As some of you all know. Ever since I got my car back together, after driving it for ~15mins or so. The car becomes very sluggish, vtec doesn't work, and the car will not rev past 52xx rpms, it will in neutral, but it makes a popping noise as it pasts 52xx rpms. For the 1st 15mins or so, vtec works, and the car runs perfectly. Also after the car starts acting up, it will begin to idle high, sometimes as high as 2500rpms. It idles normally at 1st as well. I have replaced the o2 sensor, and that was not the culprit. I have an a/f guage and an oil pressure guage, both read normal. One of the local Honda Shops here stays all symptoms points to a clogged CAT. I however, do not have a CAT, my exhaust is a Kamikazi Header modified w/ a 2.5" collector, to 2.5" piping to a universal 2.5" muffler that dumps under the car, in front of the gas tank, so my exhaust is FAR from being clogged. Any help would be GREATLY appreciated, i haven't been able to participate in any autoxs or HPDEs, in the past 2months because of this

 

have you checked for codes? tried swapping ECU's?

 

no CELs. I had one at first for the EGR system, I had to 2 vacuum lines backwards, swapped em around, and it went away. I'm beginning to think its the ECU as well.

 

yeah umm swap out the ECU thats the onlything that could do what your getting i think, i mean think about it any mechanically problem would be constant but cuz the problem is constantly always there maybe the ecu is good in initial start cold mode but once it goes into normal mode soemthing is shorted out in it and or perhaps its throwing its self into limp mode hell it could be a bunch of **** but id deff swap your ECU next.

i dont really think its your problem but im assuming youve checked the head/valves and done a comp test?