flywheel

iTrader: (2)

Had my lq4/4L80E combo in my 71 chevelle tuned a few weeks ago and now Im still getting a P0103 MAF, PO327, PO332, PO121 codes in it. The 6.0l is stock except for the cam which is a TR cam with .594/.602 lift and .230/.236 duration and a 3200 stall yank convertor....and help please...
Rick

Brad Campbell

iTrader: (19)

Did you have the car running without codes before? Just a brief look would make me think it's more of a wiring issue. Is it converted for speed density or still running an airmass sensor?

flywheel

iTrader: (2)

Had it mail tune by Speartech with a van MAF, got codes then, put a trk MAF in it before the tuner got it and still have problem. Even tried another MAF that I kknow is good.... Car also dies, just shuts off while driving at least once every time i drive it, still have dash power, hit key an it fires right back up.....very frustrating.....

robbyredneck

iTrader: (1)

i have to go with brad on this one looks more like a power supply,ground or connecter issue than a tuning problem.

crainholio

iTrader: (2)

Pretty sure those sensors are all fed voltage from one fuse & circuit, verify you have 12VDC at the fuse and then work your way out to the sensors.

flywheel

iTrader: (2)

Took both grounds off, battery and wiring, cleaned threads and surfaces and re-installed then the silly car wouldn't even start. Cranked and cranked, thought the pump had died.... finally found it took an external ground off the pcm to get car to start!! Goin to call John at speartech to see what he thinks since he did the initial tune and harness.....frustrating

Rick