I dont know what's going on with my LT1 but its running a bit odd.

When the engine is cold its nice and powerful. It breaks the tires loose pretty easily.

But the problem is when it heats up and gets to closed loop, it will lag in power and even on WOT from a stop it wont break loose. It just seems weaker when passing and general driving. It also seems to hesitate as well. But at idle however the exhaust smells a bit gassy and it doesn't seems to be as loud as it used to be. I also idles kinda rough

Maybe the coil is going south? opti? The opti is stock so any suggestions? Engine is stock

Thanks a bunch.

 

Check it for codes. Mine did this when my opti was going bad. It would run fine when cold once it heated up would miss and not run then it would throw a code and go into "Safety mode" and run fine again, until I cut the car off then it would do that everytime

 

thanks I'll check that out.

 

any codes???

 

no codes. no SES light either. It used to give an EGR code a while back, but nothing since.

 

Sounds like the o2's are going bad. That would explain why this only happens when it's warm. The o2's aren't used until it reaches normal operating temp.