bBody22

What are some signs of the computer going out on the LT1 motors.

any help is appreciated thanks

ZFreie

What is the car doing that makes you think the pcm is failing?

shbox

Better to give symptoms, than to try to pin a problem on a specific thing. Computers rarely go bad.

bBody22

about a month ago after i put on a new distribtor and coil and fuel injectors the car stared running fine then i noticed i had to give the car gas for it to crank and just a few days ago the car will just run for a min. or two and just shut off.

I hope you all can understand what im trying to say

05HD

Yeah, that is probably not a computer "going bad".

I'd start diagnosing the problem by checking the fuel pressure and checking for trouble codes.

bBody22

fuel pressure is at 36-38 and the check engine light is not on

ZFreie

Thats a little low, should be 42psi at the fuel rail iirc

bBody22

my mechanic told me it was either my computer or my distributor

bBody22

i also tried a new fuel regulator also and that didn't fix the problem

shbox

Have you checked for the presence of spark when it dies and won't start? BTW a DTC 16 from the opti does not make the check engine light come on, so you really need to scan.

RogueLT1

iTrader: (2)

What is the year and model of the car? What mods have you done?

jaycenk

iTrader: (1)

fire the mechanic. Any mechanic that goes straight for the PCM as a source of the problem before going throught actual signal test to and from the PCM is a waist of money and what I like to call A Parts Pusher. Stay a way and do some of the basics stated above. find someone with a fuel pressure gauge, a scanner that can data log and run it until the problem happens. It can be a bitch to figure out but spend the time you will save a ton of money V's having this so called mechanic throw parts at it.

ZFreie

I'm glad someone else was willing to say it lol

bowtienut

iTrader: (1)

There, I fixed it for you.

bBody22

He put a scanner On it and he said when the car goes dead everything is said to still be good and running there for its either the PCM or the disturbor

1994 Caprice

96capricemgr

iTrader: (1)

What distributor did you put on and did the one before this die or was it replaced as a tuneup item?

bBody22

acdeldo and it went out so i put another one on. when that one went out i was popping when i went to refire the car amoung other things.

96capricemgr

iTrader: (1)

Was the vent harness changed? I think you might have missed the cause of the first failure. Also they often just need a cap and rotor, don't buy into the opti hate. It is a good piece when handled competently.

bBody22

[QUOTE=96cno not that I know of one of the two screws was out of the rotor when I took it apart. What do I guys think is the problem

bBody22

Last time my opti went out it would run for A ill while bout 20min before shutting off and pop when I go to recrank now it only runs for 5min or so before shutting off and I have to pump the gas pedal for it to crank. Have u went there anything like this before