ok i got a 91 crx hf with a 1st gen jdm b16a in it, PWO mugen chipped ecu 4800 vtec, 8500 redline and my car sputters and misfires really bad, we put my friends ecu in outta his 91 integra LS and it stopped sputtering jus no vtec, but it ran a hell of a lot better.. then we put a stock b16a ecu in to see if it was somthing to do with the ecu being chipped, and it sputtered again, then we put in his LS ecu, and it stopped sputtering.. weird huh? could it be my vtec wiring? or could this be something serious?

id really appreciate this if someone could tell me what u think?

 

dids that to me but the other way around it was knocksensor

 

either all the way 8500, or stops at 3000.. so... hmm? how much is a knock sensor, and how hard is it to put in?

 

It does it through the whole rpm range and its getting worse by the day.

 

yep..

 

yes that is not good you need to fix this asap cause if it a wiring problem and getting worse your going to wake up one morning to a new giant paperweight

 

yea.. were tearing it apart tomorrow..

 

what exhaust manifold do u have? obd0 b16's have a weird dual o2 sensor arrangment which can cause trouble if u have an aftermarket header that doesnt do this. The LS map may be a bitch richer. THe b16 compensates by lower base FP but i beleive the ls will still be a tad richer. but nothing enuf to be a night and day different liek you are descring. Has nothing todo with vtec wiring.