littlesk8cracker

so heres the story. over the weekend i did a little work on my 94 lt1. i changed out the catalytic converters and the exhaust, and put in a new fuel filter. took it around the block a few times and it was fine. then this morning i went to go to school and on my way there, the car backfired for a few seconds then just shut off on me. i couldnt get it started so i called the tow truck and had it brought back to my house. after i got it home, i started checking things that i messed with over the weekend. wasnt the fuel filter, wasnt the 02 sensors, wasnt the ground wires that i disconnected to take the old cat out. couldnt find any leaks or anything. i used the paper clip method and got a code h62 (something to do with an oil sensor). well i had a spare icm laying around and for sh*ts and giggles i threw it in there. car started right up and had no problems. i drove it around for 10-20 mins, let it get up to full temp, did some hard accelerating, some idling. everything seems good. was this just an odd coincidence that my icm went bad the day after i did a bunch of work to my car? something just doesent feel right? any opinions on the situation?

littlesk8cracker

any suggestions? car was fine today. possible that the icm going bad the day after i finished doing all the work was just an odd coincidence?

sailorsteve

A problem that crops up immediately after working on the car is almost always related to the work. In your case, could the connector to the ICM have been disturbed, causing your problem?

SunCr

Hard to say because the "h" means History and it was no longer present when you turned off the motor and it would have gone away with 100 ignition cycles. Generally with History Codes, you clear and restart and then if it comes back "c" or Current, use the Trouble Tree for the Code.

larry93lt1

I just replaced my heater core and can't get the damn engine to fire.
Security Light and SYS are 'a flashin', no Service Engine Soon light.
Replaced coil and module, Injectors won't fire.
What a PIA this has been.

I just had to put the on the new wheels and tires.
I just love my '92 C4, just not as much as the '93, yet.

sailorsteve

Those two lights flashing together indicate a "Fuel Enable Data Stream" failure, reference the FSM, page 8D-3 and section 9D.

littlesk8cracker

well iv had the car out a few times recently and all is well. i guess it was just coincidence that the icm went out after doing all that other work

sailorsteve

We like happy endings.

jsuzz_22

I dont think it is. I had the same exact problem with my 94 and guess what code i got... H62. Bad oil temp sensor. I noticed that it says on my guage when the car is running the oil temp is 0 which cant be right. So... I also had a spare ICM I put it in car fired right over I drove it around in closed loop and then I look at the oil temp sensor, its sitting right below 215. I cleared the code using paperclip method and it didnt come back. Wild