I got all the issues fixed from another thread and now it seems one is back. If I drive a few miles and it warms up, I might only get to 4k in first, 3500 in second and 3200 in third. If it downshifts the rpms just stay there. It kinda plateaus(sp) out and wont accelerate anymore. If I shut it down and restart its a raped ape and hauls ***!

Ill stop a few replies now by saying I dont have a cat and I do have a custom made Y-pipe so the inner pipe didnt collaspe cuz there isnt one. I just replaced the ICM and the opticoil. Also had to put the stock coil back on cuz my MSD went out

 

I had what sounds like the exact same problem with one of my honda beater cars. I pretty much flushed the whole fuel system, and never figured it out. I eventually sold it as it was and I have a feeling it was something inside the ECM that when it was in closed loop it had a sensor malfunction or soemthing.

 

Have you changed the O2 sensors, egr valve maybe?

 

both are brand new and I even swapped out the right one too cuz I thought the issue was there also

 

it wont even reset anymore. It just falls on its face at 4k. Im kinda glad being as I just dropped this motor in and I am still testing it. It wasnt a rebuild just a 52k motor I got from a yard. I do wanna get it past this cuz Ive never had this kinda power before and I like it and want more now. It just seems to run out of pedal. I know the TPS is working cuz it will just stay there untill I let off and let it shift. When it does I might get a littel backfire out of it also.

 

come on guys this is getting worse. its coming down more and more. its around 3500 now. I did notice today that the a/f ratio gauge is lean off the chart when this happens