Help, cant figure this out! LTs +25

[12sec ss]

Cant figure this one out. Have a LS1 with a cam, backed by a M6. Cam specs are unknown, bought the motor used.

o2 sensors are both new, knock sensors are new, i tried another reman MAF, and another 411 PCM, and another complete known good throttle body.

Problem im having is that long terms go +25 on both sides, car starts surging and stalling when im off the throttle and in neutral coming to a stop. If I unplug the MAF, everything is fine, it idles better, doesnt stall, and long terms are -8ish on both sides. I dont know what else to try.. Motor is grounded to the body on each courner of the heads, Voltage is reading 14.1 in hptuners. Im attaching the tune and the log..

Attachment 19164

Attachment 19165

[Cantalope Kid]

Nothing is wrong with your engine install per say...you simply haven't tuned the PCM for the cammed motor. When the vehicle is in OL (open loop) its running fine...but going into CL (closed loop) once the engine warms up its trying to compensate using your 02 sensors and hold down a stoich value... I'm at work so I can't view your tune/logs. Do you have any experience tuning? Do you have a wideband?

[12sec ss]

Nothing is wrong with your engine install per say...you simply haven't tuned the PCM for the cammed motor. When the vehicle is in OL (open loop) its running fine...but going into CL (closed loop) once the engine warms up its trying to compensate using your 02 sensors and hold down a stoich value... I'm at work so I can't view your tune/logs. Do you have any experience tuning? Do you have a wideband?

I dont have experience tuning, and no wideband.. I didnt know this behavior was normal with a cam before a tune, I'll start tonight with turning off maf and LTs, and do some VE tuning under 4000 RPM, then i'll turn the MAF back on and scale it some... does that sound about right?

[12sec ss]

Update on the problem.. Tried doing some VE tuning, I do a bunch of driving, the trims are +15 to +20, i add them to the VE and flash. Do some more driving, trims are +15 to +20 again in same spots. I add it again, do some more driving. By the third time I do this, the car starts running really bad like its got too much fuel, but it still wants more? Am I doing something wrong? I set maf fail frequency to 1Hz, disabled codes 101-102-103, and disabled PE by changing the MAP enable value to max, disable LTFT, then do some driving and add STFT to the VE.. What am I doing wrong?

[vortec]

Thats because you set the p0103 to no error reported,that code needs to be thrown to run SD (no MAF) so either let the light stay on or set to no MIL!!
If you want to mess with the VE,disable your MAF (SD) and do the VE.Renable the MAF and scale that table where it needs.
Also,no need to disable PE when doing this,that is not a smart thing to do.

[Throttle]

Update on the problem.. Tried doing some VE tuning, I do a bunch of driving, the trims are +15 to +20, i add them to the VE and flash. Do some more driving, trims are +15 to +20 again in same spots. I add it again, do some more driving. By the third time I do this, the car starts running really bad like its got too much fuel, but it still wants more? Am I doing something wrong? I set maf fail frequency to 1Hz, disabled codes 101-102-103, and disabled PE by changing the MAP enable value to max, disable LTFT, then do some driving and add STFT to the VE.. What am I doing wrong?

do u mean u coppied ltft results from the scanner and copied them then right clicked on your VE map an did paste special mulitply % in speed density