Ok i have an 87 Iroc with a m5 and 305 tpi... i did a motor swap to a 350 bored .040 over with aluminum edelbrock heads, new accell injectors 30lb, lt1 cam, 1.6rr, edelbrock headers and Y, i kept the original tpi. The motor ran great*aside from the timing being a little off* until one night on my way home i smelled gas... injector was leaking, i took off fuel rails and replaced the already new rubber o rings with new ones. i bolted everything back up and cranked the engine. i get a very rough idle and the car shakes and shuts off if i dont give it gas. also i had a problem of when the car was hot it wouldnt crank back over, and i read somewhere here that this may be caused due to a coolant temp sensor. anyways could someone help me out with any info on why my engine could be running like this... after just changing the O rings? ive searched for a while and found very little. thanks guys!

 

I wonder if the ecm adjusted for the less fuel from the leaky o-ring and now that it's fixed. It is still trying to compensate for what was wrong before hand. Kind of like a "phantom bandaid." -Just a thought.

 

have an idea how to fix that then?

 

Try resetting the ecm. Pull its power for a few minutes. Is it running rich when it does run?

 

yeah its running a bit rich... it ran fine when i drove it down to San Diego from San jose about 500 miles for breakin... and when i was driving here it ran fine i never abused it or anything. then this happens and seeing as how i live in an apartment now and do not have access to tools im looking for a speed shop or soemthing to work on my car but san diego doesnt seem to be the place for muscle cars haha...

 

Is it still MAF equipped? Any codes? Did you have a custom prom burned? And why'd you go that big on the injectors? Future mods?

 

well you may look into you may have a vacum leak
when you cahanged to O ring
ez way to check is use a propane bottle DONT LIGHT IT
and run it around the runers when running
if it reves in a spot thats your leak

 

Yes it is still MAF equiped... the injectors are for future mods and i have a chip burned but not dyno tuned. thanks for the propane idea ill have to try that as soon as i get the chance.

 

caution around the coil
one spark will light it