LT1 trouble again!
LT1 trouble again! Alright so I've got the car actually running .. sort of. The car would start and then 2 mins later it would just die. After a few starts and it doing this its decided it doesn't want to start at all. I hadn't started it for about 5 days and decided today I'll see if it starts, fuel pump primed, turn of the key and instant start. It ran for about 2 minutes then died. I started it right back up and did the same thing. Now the damn thing will not start again. also when it's idling every so often it will backfire, not to bad but still backfire... I'm baffled.. anyone have any suggestions? so far on the other forums I"ve heard that its an icm issue or the opti but I thought I would get yall's thoughts on it?
On The Tree
Joined: Jun 2008
Posts: 183
Likes: 0
From: new orleans to houston
i really think you should get ur coil or icm tested because im going thru the same thing...and hell i didnt even get it tested yet! try the icm cooling mod too. i heard it works wonders. i havent tried that yet either lol!
I just went thru the SAME THING.. I wasted money on a new ICM and a new Coil(prolly needed new ones anyways) but it continued to do it.
It was actually the ICM pigtail..the prongs were bent.. I had to bend them back to get better contact...
after it died I would unplug the pigtail then plug it back in and it would start back up..
Just something to check out..
It was actually the ICM pigtail..the prongs were bent.. I had to bend them back to get better contact...
after it died I would unplug the pigtail then plug it back in and it would start back up..
Just something to check out..
Launching!
Joined: Dec 2004
Posts: 242
Likes: 0
From: Cana, VA
I had this problem, alot. Every time it was the OPTI. Let me ask a couple questions. Do you spin 6500+ rpm often? Do you make pretty decent power? I had the setup in my sig, everytime I would spin 6800+ while running the 1/4 on spray 50 miles later opti would die. Went to a MSD never had another problem. Went through 3-4 stock replacements. I got videos still I think of mine screwing up.
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As stated, check your ICM and coil, do the ICM cooling mod, check all pigtails associated with the ignition system including the opti harness.
Where is your fuel pressure at when the car is acting up?
If none of the above reveals the culprit, then it could be your opti.
Where is your fuel pressure at when the car is acting up?
If none of the above reveals the culprit, then it could be your opti.
Launching!
Joined: Dec 2004
Posts: 242
Likes: 0
From: Cana, VA
Mine would run good for the first 2-3 mins, then gradually would really screw up.
http://s35.photobucket.com/albums/d1...=Crazyness.flv
http://s35.photobucket.com/albums/d1...=Crazyness.flv
Teching In
Joined: Jan 2009
Posts: 2
Likes: 0
ya i pretty much have the same thing going on. My Z will run for about 5-10 mins and just start acting up. It starts to miss, drop in rpms, and die. i replaced injectors, plugs, the opti, alternator, and battery, im really startin to think its the computer.
