Just trying to get some more info on this code. My car is running ok, but usually after about 30 min driving it will start throwing codes and stall out.

the other day it ran like crap, almost home from work and i pulled these codes:

MALF 32: EGR System Fault
MALF 48: MAF fail
MALF 36: Hi-Res Fail
CODE 16 Lo-Res FAIL
MALF 51: EPROM/Flash Checksum Fail
MALF 42: EST GROUNDED
MALF 41: EST OPEN
malf 46: FUEL ENABLE (VATS) FAIL


Edit:Also found it strange about the vats fuel enable code, as vats is disabled in the tune, and there is a resistor hard wired into the column harness. Also after I cleared the codes I reprogrammed the pcm back to the stock tune to eliminate a possible corruption in the tune, though I've been driving on this tune for a couple of months with no issues.


cleared codes, drove fine next day while scanning, then day after that it dies while pulling into work. cranks right back up, runs like crap.
Pulled codes when I got home:

MALF 15: COOLANT TEMPERATURE LOW

get under the hood, check connector, notice icm is cracked

replace ICM and clear code, crank it back up let it run, it dies
Pull these codes:

MALF 36: Hi-Res Fail
CODE 16 Lo-Res FAIL
MALF 41: EST OPEN
MALF 51: EPROM/Flash Checksum Fail

Things that I have noticed:

the longer I drive the lower the voltage shows on the cluster. It starts out strong at about 14-14.5 volts and by the time I get to work it is at about 13 volts. Also when data logging if I hit a good bump i lose sync with the PCM.

I don't have any issues before it is thoroughly warmed up.

What really gets me is the MALF 51: EPROM/Flash Checksum Fail
I can't seem to find any info on this code.
any ideas?

Thinking possible short or bad ground could cause it but where to start looking?

 

Pull the PCM Batt guess and cycle the key on for ten seconds, then back off put the fuse back in, hook up your scanner, turn the key back on and check for codes. If you have the 51 back, you MAY get lucky & be able to flash the PCM. I have never seen that work, but it's worth a shot. Otherwise you have a chip failing.
Good luck

 

will do as soon as I get home today.
First time I got the code I cleared it and reflashed it back to stock tp make sure it wasnt a tune issue