Rafig process

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Originally Posted by Doc

What value/ units are you using in DesAir?

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Doh! Grams/sec... That's my problem...

o.k. I have been making a lot of progress...however I am to the point now where it keeps telling me to add .5 at each temp. I have added .5 3 times, and every log tells me to add .5 again. Any thoughts?

The other issues are a high start up like around 1800rpm , it comes right back down, but I would like to fix this. Also a fast rolling idle of around 1200rpm, that doesn't drop until I get below my 15mph set point. Weird thing is, it doesn't always do it, just after a long time at constant speed.

Any help is appreciated... thanks!

Jason.

No thoughts???? I have been through every table and parameter, and can't see anything that is obvious. ANyone?

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Originally Posted by Jason S.

o.k. I have been making a lot of progress...however I am to the point now where it keeps telling me to add .5 at each temp. I have added .5 3 times, and every log tells me to add .5 again. Any thoughts?

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+/-.5 works for me. Day to day I'll see the thing go up and down +/- ~1.0 and am happy with it. It fires up on it's own and it is happy.

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Originally Posted by Jason S.

The other issues are a high start up like around 1800rpm , it comes right back down, but I would like to fix this. Also a fast rolling idle of around 1200rpm, that doesn't drop until I get below my 15mph set point. Weird thing is, it doesn't always do it, just after a long time at constant speed.

Any help is appreciated... thanks!

Jason.

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The high startup- what are you commanding when you get the 1800 surge? What is your IAC counts(forgive me if you have the ETC)at?

Fast rolling idle ~1200 that doesn't drop below 15mph- Throttle Cracker/ Follower Delay/Rate settings.

Bottom line, all of these symptoms are related to the IAC valve (Actual TB Blade for ETC) not being optimal for your setup and can be a pain without a RR to get that instant feedback without stopping and flashing and then starting again. All I can say is give the car what it wants in small amounts/ changes. Try not to get frustrated and change more than one thing at a time.

It is ETC. High rolling idle does drop below my 15mph set point.... I just can't see where to make the changes above that mph. I'm not frustrated, I have just exhausted my resources from what I can see in the software. I was kind of hoping someone had experienced this before at some time, and could point me in the right direction.

THanks

Jason.

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Originally Posted by Jason S.

It is ETC. High rolling idle does drop below my 15mph set point.... I just can't see where to make the changes above that mph. I'm not frustrated, I have just exhausted my resources from what I can see in the software. I was kind of hoping someone had experienced this before at some time, and could point me in the right direction.

THanks

Jason.

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Throttle cracker most likely....if you're rolling, haven't been on the gas for a while, and it's idling at 1200 or higher, you need to reduce the throttle cracker in the appropriate cells.

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Originally Posted by SSpdDmon

Throttle cracker most likely....if you're rolling, haven't been on the gas for a while, and it's idling at 1200 or higher, you need to reduce the throttle cracker in the appropriate cells.

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Throttle cracker is at zero at those points. It's not when I haven't been on the gas for a while, it's when I have been cruising for a while, then come to a stop (I.E. on the freeway). It drops back down the second I get below 15mph set point. I just can't see anything that applies to those conditions in the software.

Thanks for the input!

Jason.

Just start logging airflow pids. If it's not something that jumps out at you, I'd start looking over the mechanical parts.

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Originally Posted by SSpdDmon

RAFIG and RAFPN are pids included in the last two or three released versions of EFI Live. They are calculated .pids that work off of other logged .pids:

GM.IAC_LTD_DMA & GM.IAC_STD_DMA for RAFIG

OR

GM.IAC_LTPN_DMA & GM.IAC_STPN_DMA for RAFPN

So, you need to have all 3 .pids in order for your log to work.

In the scanner, you need to build a map to reflect the Desired Idle Airflow table. The data is the RAFIG or RAFPN. The rows are ECT (as seen in the tuning tool). The way I setup the single column is to log RPM. The label I use is ,8000 (yes you need to type the comma).

Log from a cold start until up to operating temps. Paste and add the results to the Desired Idle Airflow table.

A couple of passes will help you get this close. Keep in mind it will vary from day to day, which means it'll never be perfect. Just like the fuel trims, I like the numbers to be slightly negative. Get it close to zero and then add a little more (ie 0.5 grams/second).

That's how I did it.

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I know this thread is old, but I'm curious, can you do this when the PCM is setup for AutoVE? As in open loop, speed density? Should I do the autoVE first, or this first?

That's a good question. I am going out this morning to log this again and I had the same thoughts. I am in SD and after my 2nd round of logging and adjusting RAFIG I am full tilt lean on my WB gauge at startup and until I reach running ETC.

I'm in Northern KY, where abouts are you in Cincinnati?