hey i need help i have a 91 crx dx with a b16a out of a 91 civic sir and i have replaced just about evrything i can think of. main relay, ground wires, ignition sys, vacuum, i got the wireing harness ( i did not make it myself took the easy way out). but anyway the car runs great better when it is cold. but when i let off the gas the check engine light comes on the main relay clicks and the car backfires bad. and some times ( not very often at all or when i try to show someone) it will work fine for 3 or 4 miles then start doing it. any sugestion ?????? please help

 

Can you get the code from the ecu? This might help diagnose the problem. How was the wiring harness done? Hopefully you just had your existing harness modified for MPFI and VTEC right?

 

no codes and yes the wireing was done like that

 

now it seems to want to come on while i am accelerating now at about 4500 the check engine light comes on and the main relay clickes and it spudders any help ?????