OK, I put in a new opti, harness, coil, ICM, coil wire, & Plugs. The car ran fine for a few days after I put the new opti harness on. Then after taking it up through the RPM's it started to run like crap again. Now it will start and run but after it gets warmed up everytime you let off of the gas it dies. Plus it cuts out real bad after 4000 RPM?? What the helll is wrong with this thing? Do you think that an LTCC kit would fix my troubles?

Thanks in advance

 

My car missfires a lot but after I put pulf wires it took care of it, now I put a coil, it runs good but not were it should be, I think that a Fuel system service, clean the throttle, intake, and fuel rail, will take of the problem and improve throttle response also. I will be use BG chemicals.

 

But it has good fuel pressure and this didn't start until my opti went out and I put a new one on so it leads me to beleive that it isn't a fuel problem.

 

Stop chasing what you already replaced. You said it's crap after it warms up. So you're saying it's ok while it's in open loop? If so you have a control problem. Try unplugging a front O2 and see if it runs better at that time.

 

That's what I'D TRY!