Grumble Grumble
 

Ok, some background info:

I have a 91 honda Crx Si with a b16a j-spec swap. I just recently swaped a newer motor *old one was trashed* and it runs great execpt for one thing.

When it warms up it idel's normal but when you go to punch the gas it studders and grumbles, almost like its not getting any spark or the timing is off. We have replaced the plugs, wires, cap, rotor, checked the timeing, and replaced the MAP sensor. Now when I firsted swapped this it worked fine, after 2 days it started to do this and the problem is getting worse every day.

Any ideas???

Racerx

Sounds like a fuel issue. Might be the pump or filter or dirty injecters. Or it might be the ecu learning itself. When I swaped my civic it took like3 weeks, it would stumbile under acceleration. I read on the Shop Key it could take 100+ starts to run normal

I figured out the problem.

Check this, O2 sensor.

the wire was melted on the block, shorted the o2 sensor, the o2's only begin to work when its hot, so after it warms up the car drives like hell. The computer threw no codes, damn swaps.

the turnout: works like a ****ing beast now!