BOB URZ said:
My 96 S10 seems to have some issues when its cold and i am suspecting
some potential problems with the computer under the hood.
Normally, i would have no problem with tearing one apart and checking
solder joints or such. But, i don't not have a spare and do not want
this to
be a one way trip. Anyone tore down a mid 90's Gm vehicle computer
soldered it up and inspected it, and put it back on line successfully?
Any pictures internally if you did? Any tips? This is a OBDII unit.
BOB
Sorry in advance for the slight off-topic
Bob, for your consideration:
I have heard of numerous problems with GM's computers/proms. Most are
late-80's early 90's, but the same could apply for mid-90's. I had a
1989 Oldsmobile Cutlass Ciera 3.3L that ran very poorly. A mechanic
scanned for codes and it was found that the coolant temp. sensor was
reading full hot ALL the time. This mechanic changed the sensor (and a
few other sensors) and it didn't solve the problem. I decided I would
finish the repair. I went to the scrapyard and picked up a replacement
computer (with prom). I swapped the proms and put in the new computer.
SAME PROBLEM. Swapped proms, and it ran like it should. Corrupted
proms do weird things.
Another nearly identical issue was with my co-worker's 1991 Olds
Cutlass Supreme. The car ran poorly and smelled of gasoline. If he
didn't keep it revving, it would flood out and die. He swapped out
sensors from a wreck to no avail, and once again, swapping PROMs fixed
the issue. Seems the corrupted prom was keeping the fuel injectors
open either constantly, or just too long.
BTW: the computer on most of these vehicles is located behind the
glovebox. I'm sure you know this, but when removing the prom, keep in
mind that they are **particularly** sensitive the ESD.
One last note: I opened both computers and found no potting compound
and all solder joints looked great.
Take care and good luck with your repair!
-k