Turbo Silverado goes really lean idling in gear

[94heritage]

Had a local guy drop off a truck for me to tune for him. He just bought this unfinished truck that supposedly just needs a tune. Well the truck starts and runs great in park but once you drop it in gear it will randomly go super lean and almost want to die. You shift it back to park it cleans right up and runs great again. Then drop it back in gear and it will idle perfect. So I took it for a spin after it ran decent and it seems to have slight miss at light throttle tip in. The wideband shows good when it starts to miss but you can tell its breaking up. I checked over the injector data and everything seems to be correct on it compared to some data that i found on here. Any ideas from any one? Setup is 99 silverado 1500 6.0/60e btr stage 4 truck cam, deka 80 injectors from fuel injector connection (FIC), 3 bar map unknown brand (seems to be a little off on kpa reading), vs 78/75, wally 450 in the tank, aeromotive regulator and holley rails base psi is at 52. Very end of the log where it pegs the wideband at 18-22 afr is with it in reverse and then when it goes back into the 14s its in park then back to drive. Log and tune attached.
braxton turbo silverado my base with new data.hpt
braxton turbo silverado.hpl

[mister480v]

Wonder if the fuel is falling out of suspension in the intake charge at low rpm, that's where the intake velocity is at its lowest. I've seen that before with cams that are too big, don't match the airflow of the heads. Also seen it on my personal truck where I got carried away porting the heads and they flow way more than the little 4.8 needs. To compensate, I just richened up the VE table in that below 800 rpm range and it seems to do ok until its super cold out, otherwise no issues. Ran the log you attached, didn't see anything graphed from the O2's. Anyway, that's my only running theory right now.

[94heritage]

Not running on the narrow band sensors at all. Tuning it in open loop with the wideband. Aem 30-300 wideband

[blindsquirrel]

"aeromotive regulator" - but with no vacuum reference hose? Injector data is set up for a nonreferenced 'returnless' system, boost plus aftermarket regulator is usually done to gain the benefit of boost reference, which needs different injector data.

Gen 3's with the rear O2s deleted will repeatedly go lean, then rich, trying and failing to get a result (even a 'fail' is a result) from the catalyst/post-O2 tests. These cannot be disabled in the tune.

Your MAF DTCs are set to No MIL, not MIL On First Error.

Logfile has a P0200 - Injector Circuit (Current) set.

I stopped looking after that, life is short.

[94heritage]

"aeromotive regulator" - but with no vacuum reference hose? Injector data is set up for a nonreferenced 'returnless' system, boost plus aftermarket regulator is usually done to gain the benefit of boost reference, which needs different injector data.

Gen 3's with the rear O2s deleted will repeatedly go lean, then rich, trying and failing to get a result (even a 'fail' is a result) from the catalyst/post-O2 tests. These cannot be disabled in the tune.

Your MAF DTCs are set to No MIL, not MIL On First Error.

Logfile has a P0200 - Injector Circuit (Current) set.

I stopped looking after that, life is short.

It has reference to the regulator and it doesn?t have a maf. Any of the other stuff I have ever tuned that is speed density has always had the maf codes set to no mil light so your not staring at a check engine light all the time. When I scanned it before the test drive there were no codes in it. But that was right after a flash so that probably explains why I didn?t catch that.

[blindsquirrel]

It MUST have a P0102 or P0103 for it to be in speed density. It doesn't. You can keep the light from coming on by just unchecking the SES Enable box.

The injector data needs to be fixed. Copy the 0 kPa column, paste into every column all the way across. Do that for both Injector Flow Rate & Offset vs Volts vs VAC.

[edcmat-l1]

The thing barely has any manifold vacuum at all. Can't be from the cam. Gotta be a BOV that isn't open or bad vacuum leak or something.

[94heritage]

It MUST have a P0102 or P0103 for it to be in speed density. It doesn't. You can keep the light from coming on by just unchecking the SES Enable box.

The injector data needs to be fixed. Copy the 0 kPa column, paste into every column all the way across. Do that for both Injector Flow Rate & Offset vs Volts vs VAC.

Ok. I will give this stuff a shot. I appreciate your reply. Do you have any tricks for the rear o2s?

[edcmat-l1]

I'd be worried about where the vacuum went. Bad injector data ain't gonna cause that. The vacuum being so low is an indication there's a real mechanical problem.

[94heritage]

I'd be worried about where the vacuum went. Bad injector data ain't gonna cause that. The vacuum being so low is an indication there's a real mechanical problem.

I will check for a vacuum leak as well or see if the bov is leaking

[blindsquirrel]

Could be a false reading, what the MAP displays is a direct function of the linear/offset numbers in the tune.

[edcmat-l1]

Could be a false reading, what the MAP displays is a direct function of the linear/offset numbers in the tune.

It's possible but the KOEO MAP is 105. So the idle Kpa in relation is terrible.