I can't get pulse width low enough on siemens/mototron 60lb injectors

[ryans1000]

I have Mototron/siemens 60lb injectors on a stock ls1 motor with turbo. My wot and cruise tune with them is pretty good except for a rich idle at about 12:1 afr.

I have my all my injector tables setup for these injectors. I can't seem to get my injector pulsewidth down below 1.8. I keep lowering my ve table for the idle cells for testing, its way low around 15-20 now. But the pulse width will not go any lower . I could start hacking the b3701 and b4005 tables but it seems like the pulse widths should be able go lower with these setting. How is pulse width calculated? Any suggestions?


Here is what my tables look like

b4006 small pulse threshold is at 3.997

b3701 Injector Pulse Width Voltage Adjustment
Battery Volts {link: GM.VOLTS}
12.0v 12.5v 13.0v 13.5v 14.0v 14.5v
0.68 0.607 0.53 0.47 0.41 0.34

b4001 injector flow rate table is at 9.2422 on all cells with vacuum/boost referenced regulator.

b4002 Injector voltage correction cells are all 1.0

b4003 and b4004 minimum pulse widths are set to .80 .

b4005 Small Pulse Adjust (Milliseconds)
Milliseconds Value
0.000 0.121580
0.061 0.106383
0.122 0.106383
0.182 0.106383
0.243 0.091185
0.304 0.091185
0.365 0.091185
0.426 0.091185
0.486 0.091185
0.547 0.091185
0.608 0.091185
0.669 0.075988
0.729 0.075988
0.790 0.075988
0.851 0.075988
0.912 0.075988
0.973 0.060790
1.033 0.060790
1.094 0.060790
1.155 0.060790
1.216 0.060790
1.277 0.045593
1.337 0.045593
1.398 0.045593
1.459 0.045593
1.520 0.045593
1.581 0.045593
1.641 0.030395
1.702 0.030395
1.763 0.030395
1.824 0.030395
1.884 0.030395
1.945 0.015198
2.006 0.015198
2.067 0.015198
2.128 0.015198
2.188 0.015198
2.249 0.000000
2.310 0.000000

[5.7ute]

Can you post a log? Include DYNCYLAIR_DMA, GM.VOLTS, GM.AFR & GM.INJFLOW to the log if not already selected.

[joecar]

Some people have gotten large injectors to flow small amounts by running a lower FPR pressure.

[5.7ute]

Some people have gotten large injectors to flow small amounts by running a lower FPR pressure.

With those injector settings he should at least be able to get the pcm to command a smaller pw. Which for some reason isnt happening in this case. The 60lb motrons, from the info I have should be fine as low as 1.4-1.5ms.
Hopefully, by getting the necessary pids in a log file we should be able to see what is going on.

[joecar]

5.7ute, I looked thru some threads, you're right, he should be able to get down a bit more... :)

[5.7ute]

5.7ute, I looked thru some threads, you're right, he should be able to get down a bit more... :)

I am not sure how low I got mine on the old motor, I will have to see if I still have some old logs but I reckon they got nasty at around 1.3ms.

[ryans1000]

Thanks. I will do another log tonight and post it.

[ryans1000]

Here is the two uploads. Let me know if you need anything else. This is the first time someone has looked at my self taught tune/logs so let me know if you see anything wierd.

My signature has some of my setup details

7408

7409

7410

[5.7ute]

Very strange.
Going from your reported idle airmass of 0.03g/cyl , the pcm should be commanding around 0.8ms IBPW. (This is including the modifiers). Its like the minimum & default PW havent taken.
Have you read the tune from the pcm & verified it went through. Also there is a couple of out of range tables that need fixing {B6619} & {B6620}
I will keep looking.

[ryans1000]

Have you read the tune from the pcm & verified it went through.

I just read the tune from the pcm and yes it went through :) . Thanks for looking at it. Let me know if you want me to log something else.

[5.7ute]

Also you may want to look at why you are getting the P0357 DTC.
I cant see why you are hitting that limit. I will have a play with some bins tonight to see if there is another table somewhere causing this.

[joecar]

Fix those out-of-range cells and fix P0357 before proceeding...

[5.7ute]

O.K. I had a play last night & did find another minimum pulsewidth table which I believe is active during transient conditions. This table in your file is set to 1.27ms, which with the modifiers will give you a IBPW of 1.79-1.80ms, same as your log.
I have attached a cax file so you can edit this table to match your other min pw tables.
This has not been tested so please be careful. If it doesnt fix your min pw at idle return to stock. You will find that if this does lower your min pw you may need to raise your VE table in the idle cells, as I think it is now too low.
Also, if this does end up lowering the min pw there may be a problem in your tune elsewhere which we will have to pinpoint.
Anyway let me know how it goes.
Cheers Mick
Edit, wont let me upload a .cax file. pm me your email address & I will send it to you.

[joecar]

Mick, you can zip it and then attach it.

[5.7ute]

Here you go.
Thanks Joe:cheers:

[5.7ute]

BTW this .cax will add a folder called "Transients" in the tune tool. Once verified I will change it to go to the "Injectors" sub folder in the "Fuel" section.

[Chuck L.]

Some people have gotten large injectors to flow small amounts by running a lower FPR pressure.

was thinking, too.
At 58psi, the Motos are flowing 69.28pph.

[5.7ute]

I just done some quick maths. (well maybe quick for others)
IBPW = Airmass/AFR/IFR*1000 + offsets + spa. (I know Marcin, I havent fully proved it yet)
So we should be able to calculate your actual cylinder airmass at idle with the equation.
Cylinder airmass =(IBPW-offsets-spa)*IFR*Wideband AFR
Using your log we have
(1.770046-0.4711-0.030395/1000)*9.242188*12.3 = 0.144207498 G/cyl.
If others would like to check my equation that would be great. To me it shows you underestimating airmass at idle by a fair wack. (0.0312 g/cyl in your tune) So once the min pulsewidth issue is sorted you will be way lean.

[ryans1000]

OMG... well sorry not to reply to my own thread quicker. This is really crazy and quite embarrassing but after you seen my dtc's for me in that tune I checked my car over and my cylinder 7 coil was not plugged in!! After doing a bunch of work on my car before winter and I put my turbo kit on I had coil 7 out to fit the motor back in and must have forgot to go back and connect the coil into the harness. I don't have a check engine light in my swap car so I never knew about the dtc and forgot to check that on efilive.

My motor sounded different but I contributed it to the new exhaust routing through the turbo. And with the new turbo the car still had more power overall so I didn't notice the power loss. So I had my car running without cylinder 7 for a couple hundred miles and tuned my ve table with it that way. I can't believe I did that , hopefully it did not harm the motor.

The good news is my car has so much more power now, especially low end torque. it feels great and my turbo spools up noticeably faster. These last two days i've had a blast driving the car with the new found power.

So thank you so much for looking at my log 5.7ute . It appears the pulsewidth problem is still there so i'll start looking at your suggestions.

[5.7ute]

No worries.
I am interested to see if that table is active in your tune & causing this issue. I cant find anything else wrong at the moment.
I am not sure if you have used a .cax file before, but the directions on where to put the file are pretty clear in the cax section.
Keep us posted.

[5.7ute]

Just for the record. Was your wideband in the same bank as cylinder 7?

[ryans1000]

I'm going to bed but I can test your cax file tomorrow.

The wideband is in 3 feet after the turbo in the downpipe. It is a single turbo so both banks join and go to turbo and then downpipe.

I am open loop speed density. I was expecting the unburnt fuel to have made the wideband show rich, therefore I would've countered by making the ve table lean out everything. So after the fix I was expecting the wideband to show lean but in reality everything looks to be around 5-15% richer. Not sure why.

Did the computer, knowing about the cyl 7 ignition issue, not fire the injector?? The cyl 7 spark plug looked fairly normal , insulator was just slightly tanner then the other spark plugs, also had some small black areas in it.

[joecar]

...

I was expecting the unburnt fuel to have made the wideband show rich, therefore I would've countered by making the ve table lean out everything. So after the fix I was expecting the wideband to show lean but in reality everything looks to be around 5-15% richer. Not sure why.

No, it will show lean because unburnt fuel means there is excess oxygen present... this would have caused you to make the VE table richer.

[5.7ute]

No, it will show lean because unburnt fuel means there is excess oxygen present... this would have caused you to make the VE table richer.

X2
Joe, did you have a look at my other post in relation to the maths?
I believe that this is why Marcin is dying for me to finish the IBPW composition I am working on, since once you know what part is the fuelling contribution is, you no longer have to rely on BEN factors.
Sorry to go off topic ryans1000. Just in case you have an issue with the cax file implementation, I have attached your tune file with the modification already made to the table. I also fixed the out of range values & the VE table in the idle areas is also increased to what I calculated. Keep an eye on your wideband.
Cheers Mick

[joecar]

I just done some quick maths. (well maybe quick for others)
IBPW = Airmass/AFR/IFR*1000 + offsets + spa. (I know Marcin, I havent fully proved it yet)
So we should be able to calculate your actual cylinder airmass at idle with the equation.
Cylinder airmass =(IBPW-offsets-spa)*IFR*Wideband AFR
Using your log we have
(1.770046-0.4711-0.030395)/1000*9.242188*12.3 = 0.144207498 g/cyl. <-- I moved the ) to the right place
If others would like to check my equation that would be great. To me it shows you underestimating airmass at idle by a fair wack. (0.0312 g/cyl in your tune) So once the min pulsewidth issue is sorted you will be way lean.

X2
Joe, did you have a look at my other post in relation to the maths?
...
Mick,

I looked at it and it is correct...

the parenthesis ) was in the wrong place, but the result 0.144207498 g/cyl is correct...

[ryans1000]

I did a little bit of messing with it on my lunch break. Seems to be working. it had a really lean idle at first. i eventually moved the ve table to around 78 in the idle cells and it started idling around 15.3 to 1 . almost perfect but just a hint of a miss hear and there. ibpw were mainly in the 1.6's, hitting in the 1.5's a bit. ran out of time. I'll go back out this afternoon and take a longer log.

[5.7ute]

No worries. If you can log all the same pids as before that will be good.
One thing we will have to try & work out is why that table is active in your tune, and not in others.(that I am aware of anyway)

[ryans1000]

5.7ute,

I won't have time to do another log again today but here is my quick logs from my lunch break. Log 38 is from the untouched tune you gave me and log 43 is the log after I richened up the idle ve cells as shown in the attached tune

Here is the 7429

7430

7431

[5.7ute]

5.7ute,

I won't have time to do another log again today but here is my quick logs from my lunch break. Log 38 is from the untouched tune you gave me and log 43 is the log after I richened up the idle ve cells as shown in the attached tune

Here is the 7429

7430

7431

The pulswidth has certainly lowered, which is a step in the right direction.
Have you any means of checking the fuel pressure at idle?

[ryans1000]

yes i can check the fuel pressure. i wonder if the slight miss i was getting was the injectors not working properly because they couldn't handle the low pulsewidth.

[5.7ute]

yes i can check the fuel pressure. i wonder if the slight miss i was getting was the injectors not working properly because they couldn't handle the low pulsewidth.

It's possible, but I would think that could possibly be from still being a bit lean.

[joecar]

Mick, check your email.

[5.7ute]

FWIW, I built that .cax file for the Holden platform & had a look at a few stock files. The Holden platform uses a much lower factory setting between 1.03-1.09ms, where the US platform is around 1.27ms. This is more than likely the reason why I never had the same issues getting a low enough PW when I run 60lbers on my car.
I will be doing some quick tests on mine tonight to see if this table has any effect. Will keep you all posted.

[ryans1000]

so this table you altered is a table that efilive doesn't normally show ?? so how did you find it or know about it?

[5.7ute]

so this table you altered is a table that efilive doesn't normally show ?? so how did you find it or know about it?

After repeatedly pestering MICK for some cax files he sent me 2 .bin files that I could play with & attempt to build definitions for. With some maps etc I had found on the web a few years ago I managed to find what parameters I was chasing plus a bit more.
I am still learning at this stage, but as long as I stay away from the code areas of the .bin file damage will be minimal.:rotflmao:

[ryans1000]

:master:

[5.7ute]

:master:

Nah, just too much time on my hands at work.
Just don't tell my boss.:secret:

[joecar]

Hey Mick,

Ryan's file is COS3 based on a 2002 Camaro file... does that mean it's based on 12212156...?

In my mind, the answer is yes...

This means your 02020003 cax file also applies to 02020005 and 12212156... 3 birds with one stone... :cheers: ...good job.

[5.7ute]

Hey Mick,

Ryan's file is COS3 based on a 2002 Camaro file... does that mean it's based on 12212156...?

In my mind, the answer is yes...

This means your 02020003 cax file also applies to 02020005 and 12212156... 3 birds with one stone... :cheers: ...good job.

That's correct Joe. From what I can see so far (though I am not really looking as it is way beyond my skills) the COS's still use the same main table addresses, apart from the custom tables which either use a code change to change axis, or use other sections of the file, leaving the base calibration intact.
The Corvette is in the shop trying to get it sorted for a Sunday prestart, ready for next weeks first round, so playing with mine has been put on hold till tomorrow. I will post up the results of the .cax test ASAP.
If any of you are interested check out acracing.com.au. This car really is a work of art & makes the late nights bearable.

[neil]

Nice looking Corvette Mick

[ryans1000]

that vette is sweet, post up videos when you get some

[joecar]

The Vette is pretty cool...:cheers:...and quite quick.

[5.7ute]

O.K. guys, I finally got to test that .cax file.
What I did was fit up the roadrunner, and did a quick log at idle while raising the minimum transient/DFCO? pulsewidth table. Once the value was raised above IBPW-offset, etc,etc the IBPW raised accordingly & this then became the minimum pulsewidth. It did not switch to the default pulsewidth table like when {B4003} is active.
In conclusion, this table needs to be lowered when trying to get big injectors to idle. You need to at least make the value equal to minimum pulsewidth.
Joe, that other Trim minimum pulsewidth table can be deleted as it doesnt appear to be active in the same way. I think it is more to do with end of injection.

Yaay, no more raping offset tables.:fluffy:

[joecar]

Mick,

Good job...:cheers:...RR is very handy...!!

Ok... B9021 is in, B9024 is out...

I'll sanity check the few .cax files I have and I'll post them later tonite (they're on my PC at home).

[5.7ute]

Thanks Joe.
I should have said in that last post that the new {B9021} table should be set lower than {B4003}(minimum pulse width), just to ensure that {B4004}(default pulsewidth) is still active. Though it really depends on what the tuner is trying to achieve.

[ryans1000]

No worries.
I am interested to see if that table is active in your tune & causing this issue. I cant find anything else wrong at the moment.
I am not sure if you have used a .cax file before, but the directions on where to put the file are pretty clear in the cax section.
Keep us posted.


FYI, I went back today and instead of just using your tune file I put the cax file in my \Program Files\EFILive\V7.5\Calibrations and its working and I can see the transient minimum pulsewidth table and edit it. I thought that was pretty cool. Everyone with 60lb'ers on up should have that table!

I remember another guy having the same problem a while back with these injectors so that will be nice for future guys. I do have 80lb mototrons sitting on the shelf for my future e85 ambitions, I'm getting ahead of myself but I'm curious how well those will idle.

[joecar]

I tidied up the files a little, here's what I have so far...
- changed the spelling of m/sec to ms,
- expanded the description a little,
- expanded the name to "Transient Minimum Pulsewidth",
- attributed 5.7ute (MH) in the Modifications comment.

Note:
- identical files: 12202088.cax, 01250003.cax.
- identical files: 12212156.cax, 02020003.cax, 02020005.cax.

Copy the file for your OS to the folder: C:\Program Files\EFILive\V7.5\Calibrations

Open the tunetool and search for B9021, should show as in attached pic.

:)

Thanks 5.7ute(Mick)...:cheers:

[5.7ute]

Thanks Joe.
If anyone else is looking for this parameter for a different ls1 OS either post in here or pm me & I will have a look.
ryans1000, The prestart for the car went without any major hitches. We should get some vids this weekend at the opening meet.

[johnv]

You have a PM !

Have a friend having similar problem with 120lb low impedence injectors.
Maybe your cax file will help, but he has a different operating system.

cheers
John

[5.7ute]

Try this JohnV. There is a bit more on there, some still being tested but the main one you are chasing should work fine.(B9021)
After unzipping change name to 01290005.(there is a typo present)

[BLK02WS6]

Will this help me at all with 96#ers running on a versafueler? Trying to tune one for a friend and having a tough time getting it to lean to a reasonable idle AFR...
Thanks,
Bret

[5.7ute]

Not sure what you mean by a versafueller.
If you have a tune file & log with IBPW1 or 2 post it up.

[BLK02WS6]

Versafueler is an injector driver for low impedence injectors.

Here is a log and tune file. I made some changes trying things after this one, but they are on my tuning laptop. Also, the car doesn't have a speed sensor yet, so you have to look at the TPS to see when I was sitting idling or rolling. I was trying to use SOL (STFTs) to lean it out during this log. At least you can see what I'm working with. Thanks!

[joecar]

If you have an adjustable FPR, you can try reducing rail pressure (to say 3 bar) and rescaling IFR.

If the FPR is manifold referenced, measure the rail pressure with the reference hose temporarily removed (i.e. FPR open to BARO).

[5.7ute]

The ETC's are high in that log. I guess there is no real cooling system present.
Where did you get the injector data from in regards to voltage offsets etc? They look very high to me. (not saying they are wrong just look high).
B9021 is set standard & may be contributing to your issues. I will clean up the .cax & post it shortly.

[BLK02WS6]

If you have an adjustable FPR, you can try reducing rail pressure (to say 3 bar) and rescaling IFR.

If the FPR is manifold referenced, measure the rail pressure with the reference hose temporarily removed (i.e. FPR open to BARO).

Tried lowering pressure, and it didn't really effect AFR much at all... went down to 45 pounds from 60 and it leaned it out about .5 AFR average.

[BLK02WS6]

The ETC's are high in that log. I guess there is no real cooling system present.
Where did you get the injector data from in regards to voltage offsets etc? They look very high to me. (not saying they are wrong just look high).
B9021 is set standard & may be contributing to your issues. I will clean up the .cax & post it shortly.

It was having major cooling issues - they have worked on that, but it still runs hot... I could only run it a few minutes before - made it hard to make any progress.
They are working on a new radiator setup (turbo car without much room) now, but I wanted to do some homework and be ready when they get it running again...

The injector data was some I found from someone on here or tech - as close to the injectors that I could find. Do you have any other sources for that data? I'm having a hard time with this car all around...

[BLK02WS6]

Can you tell me where the instructions are for the .cax file? I have never used them before... Thanks again for all the help!!

[5.7ute]

Just unzip that file into your mycomputer/c:/program files/efilive/v7.5/calibrations folder. Then next time you open the tune file the new parameter {B9021} will be in the injectors/parameters folder. (or you could just search for B9021.)

[BLK02WS6]

Just unzip that file into your mycomputer/c:/program files/efilive/v7.5/calibrations folder. Then next time you open the tune file the new parameter {B9021} will be in the injectors/parameters folder. (or you could just search for B9021.)

Thanks -just found the .cax thread and the instructions - done and I can see it.

Any input on my comments above? I'm in uncharted territory for me... I've gotten 42# and even 60# pretty good, but these are looking to be tough.

[5.7ute]

I don't have any injector data sources sorry. Usually I will get something started with the standard injectors which we have good known data for, & work back from there. (Extremely time consuming) While this method is not 100% accurate it does seem to work.
Once you have set B9021 lower than the min pulsewidth log again & post it up. ensure MANVAC & Battery Volts are logged along with ibpw 1 or 2, DYNCYLAIR_DMA & GM.AFR. Usually we would also need GM.INJFLOW, but since you have a manifold referenced FPR this will be a constant value & not necessary. Also make sure the fuel trims are off by commanding away from stoich AFR.

[BLK02WS6]

Will do - Thank you so much! It will be awhile before they get the cooling system straightened out, then I'll get a chance to log it some. That log I posted was just going up the street and back and it got that hot... didn't realize how bad it was till I got back to the shop.

I have been commanding it off stoich for open loop - I was just trying it for that one log to see if the STFTs would help at all...

Are there any known injectors that would be better for me to start with as far as the data?

[5.7ute]

Anything GM related that we have data for. Something like the LS3 injectors would be a good starting point.(keeping away from boost of course)
If you can post a link to where you got the 96lbers info it might help. Or hopefully someone who has used these injectors might be able to chime in & verify your data. It might be worth starting a seperate thread asking for verification & posting a tune file in there.

[BLK02WS6]

I'd have to go searching to find it again. I'll make a new post and ask if anyone has data for these 96#ers... Thanks again for your help!

[5.7ute]

No worries.
One thing I did find is that the injector driver boxes also have a minimum opening time. So even if you can get the pcm to command a short PW, the injectors will still be opened by the driver box to its minimum PW. Something to think about.
Have you looked at maybe going for the ID2000 or similar. Apparently these can be driven real low, & all the necessary data is supplied.

[BLK02WS6]

What is the ID2000? I'm trying to work with what my friend put together on this car... but if we need to change it up, I can tell him about it. I wouldn't have done most of the things on this car the way he did, but I wasn't involved in the build, unfortunately.

[5.7ute]

Have a look here http://www.injectordynamics.com/ID2000.html
I have never used them, but from all reports they are a very good injector. They also do them in smaller flow rates so there will be something there to do the job for you.

[SSpdDmon]

Kinda glad I saw this. I'm running 60lbers and have dropped the FP down to about 40psi to try and combat the rich idle. I ended up "tweaking" the voltage offset table to try and bring the idle AFR in line (was in the 11's before I did this). This kinda worked for me...got my min IPW's into the 1.6 range. I don't recall see the transient min pulsewidth table though (still using the factory '99 M6 OS). I'm assuming this is something custom??? Sorry - it's late and didn't have the energy to read through the entire post thoroughly.

[5.7ute]

Yeah Jeff. Since we started making .cax files some of these table definitions are now finding there way onto here. I have made this parameter available for a few OS's now. If you cant find one for yours let me know & I will get it made up.
I havent tested B9021 on a stock standard engine as yet. I know it was active in mine & a few of the cammed cars that have had this issue. But it could be something to do with a not fully stable idle triggering a transient condition. Hopefully the stock engined car coming in tomorrow will bring some insight into this.
Cheers Mick

[ryans1000]

Car has been running good with this modification. Will future efilive releases just include access to this new table by default

[5.7ute]

Car has been running good with this modification. Will future efilive releases just include access to this new table by default

I am sure if we can prove the table over all the LS1 OS's they will look at implementing it. However since .cax files will still be supported with V8 there is probably no need.

[BLK02WS6]

Just to let you guys know - this helped me with the 95#ers! But, they are still having issues with the cooling system on the car - trying to stuff a 100mm turbo in between the engine and radiator has proven to not work well... At least I was able to learn something and get it to idle right. Thanks again for all the help!

[5.7ute]

Just to let you guys know - this helped me with the 95#ers! But, they are still having issues with the cooling system on the car - trying to stuff a 100mm turbo in between the engine and radiator has proven to not work well... At least I was able to learn something and get it to idle right. Thanks again for all the help!

Thanks for the update.
Any ideas on how you will get around the cooling issues?

[BLK02WS6]

Thanks for the update.
Any ideas on how you will get around the cooling issues?

Not really - the guy basically built a racecar and is trying to drive it on the street... The only thing I see that they could do would be to cut the core support and move the radiator out farther to make room and then switch the fans to pullers vice the pushers they currently are. I'm not involved with the build from that aspect (thankfully), so I told them to let me know when they get it right... It will drive around okay now, but as soon as you start hitting boost, even a little, the turbo heat shoots ECT up quickly... It has a blanket, which helped, but not enough... Just too tight putting all that in the front of an F-Body...

[SSpdDmon]

Yeah Jeff. Since we started making .cax files some of these table definitions are now finding there way onto here. I have made this parameter available for a few OS's now. If you cant find one for yours let me know & I will get it made up.
I havent tested B9021 on a stock standard engine as yet. I know it was active in mine & a few of the cammed cars that have had this issue. But it could be something to do with a not fully stable idle triggering a transient condition. Hopefully the stock engined car coming in tomorrow will bring some insight into this.
Cheers Mick

Thanks, Mick! I'll try and get you a copy of my stock OS file this week and read up on what I need to do to make this work.

[SSpdDmon]

Bringing this back to the top now that I am gettin back in the game.

1) Please confirm that when I download the .cax file from Joe's March 27th post for OS 12212156 and place it into C:\Program Files\EFILive\V7.5\Calibrations, that I do or don't need to do a full flash for the change to take effect.

2) Can we get the same transient min PW table done up for the OS in the attached stock file?

I've got a cam'd car with SVO 30's and need to drop the minimums down to 1.08 to get rid of a rich decel issue. I'd also like to be able to try this out on my '99 as I'm 99% certain this is one of the major issues I coming across with it's rich decel as well.

[5.7ute]

Hi Jeff.
A full flash is only necessary when changes are made in the code section of the file, like when adding a COS. Since the changes made for min transient PW are in the calibration section of the file, a cal only flash will suffice.
I will have a look at that OS & see if I can make something up for you.
Mick

[SSpdDmon]

Awesome - thanks, Mick! :)

[5.7ute]

Jeff, What floor are you seeing for IBPW in the 99 Camaro?
The 99 code is a lot different address wise to the later 2000+ so will take a bit of digging.

[2ktransam]

I'm having the same problem with my turbo truck. I have the motron 60's and my ve table has always been screwed up from having the wrong injector settings. I would like to get the injector tables set up correctly so I can retune it the right way and not have the rich decel problem. Any help would be appreciated.

10252.

[SSpdDmon]

That tune should have the same 1.276591ms min pulsewidths as the other tune (12212156). I don't recall off the top of my head where my 99's 60lb injector tune is pulsewidth wise. But, I do know that SOB idles pretty damn rich (11.x:1) and won't lean out.