what the heck am i missing???

[BrianC98Z28]

This is on a friends 403 ci 02 SS 6spd. Ive followed the auto VE to a T and drove around a long time with the thing bucking and wanting to die and got most of the cells 4000 and below. How are you guys hitting all the cells or are you not?? I copied and pasted and multiplied with labels and smoothed it out and still end up with a big ass dip in the VE. I then reenabled the maf and tried to calibrate it like i was told to and reset the fuel trims. Everyone else ends up with great results but im apparently off in left field trying to punt.I end up with LTFT of like damn 25% what the heck am i missing??? Any help is appreciated. Here are the tunes and logs if I can post them. The orgbackupautove is the tune in the car as of right now. I cant post the autove log it says its to big i can email it to whoever would like to see it though. please help as im ready to give up on this whole tuning thing.

Brian

[BrianC98Z28]

any help???

[joecar]

Brian,

The VE table is wrong, it should not have that hole...

Are you sure there are no air leaks in intake and exhaust...?

Are you sure the PCM was in OLSD mode (open loop, MAF disabled)...?

The wideband AFR is not right, it looks very "indefinite"...
- which LC-1 analog output are you using (output # and wire color)...?
- is the LC-1 programmed to the default V:AFR curve (to match the calc pid)...?
- how is the LC-1 connected...?

Test the LC-1 -> FlashScan connection:
- program a flat 1V -> FS should see 1V,
- program a flat 4V -> FS should see 4V,
- restore the default V:AFR curve, remove the sensor from exhaust, in free air AFR should say 19+,
- apply propane torch flame to sensor, AFR should go to stoich,
- apply gas from cigar lighter with flame off, AFR should go rich.


Do you have FlashScan V1 or V2...?

Also, if you're going to use the wideband to tune the MAF,
then you should disable closed loop (the LTFT's will trim the AFR)...
i.e. OLMAF mode (open loop, MAF enabled).

Can you zip up the large log file and post it...?

My email address is in my profile.

Cheers,
Joe

[joecar]

Have you done each of these:
- heater calibation,
- free air calibration.

[BrianC98Z28]

there is some very minor exhaust leaks that i noticed. Im pretty sure it was in OLSD, i did follow the writeup completely as it said to disable the maf. I wired the LC1 up to use the rear 02 sensor connector to power it. I have it set to external voltage 2. Is that not right?? Im using flashscan V1 commercial.

[BrianC98Z28]

here the auto ve log as requested.

[joecar]

there is some very minor exhaust leaks that i noticed. Im pretty sure it was in OLSD, i did follow the writeup completely as it said to disable the maf. I wired the LC1 up to use the rear 02 sensor connector to power it. I have it set to external voltage 2. Is that not right?? Im using flashscan V1 commercial.

Analog output 2 is the brown wire... check that you're using the brown wire to feed the AFR signal to V1.

Is your LC-1 using it's default voltage:afr curve...?

[joecar]

here the auto ve log as requested.

More questions:
- was DFCO disabled...?
- was COTP disabled...?

Your LC-1 AFR doesn't look right, it's ranging too far up and down.

[BrianC98Z28]

yeah dfco was disabled, and cotp was also disabled. Ill post another log of another atempt i made tonight of trying it. and i ended up with the same damn thing. I can only seem to hit the same cells over and over again without a dyno. I gotta be missing something simple. I made sure the LC1 was right with the software.

[joecar]

Can you make the LC-1 show rich with butane gas...?