Ok here is the low down, i have a 95 b18c1 in my 1994 si. The misfiring is at random and causes vtec to cut off.I am getting the cel for the heated o2 sensor, so i replaced it. I have changed rotor button, plugs, wires, checked the timing, and all of my wiring involved with the swap. Sometimes the check engine light is on and other times it is off, when it is on the misfire happens. I am thinking it maybe a short in the ecu. But i wanted another opinion before trying that.

thanks matt

 

sounds like injector or coil, or maybe one of your spark plugs is fooled. I think what happens you just either end up with too much fuel in your cylinder, or you are just not burning it up.

 

That sounds like good reasons but would it be a random thing like once a day like what has been happening to me?

 

yeah just pull your spark plugs and see what they look like. then test the coil. if that doesn't work try getting as set of injectors which should be cheap.

 

ok man thanks i will let you know what happens

 

i kind of had a similar problem in my old car. found out that it was a bad ground. just my .02

 

ok cool, i could see that as being a problem also. But i had the fuel bumped up a week or so back and i think it may have screwed up one of the injectors so i am going to try that first.

 

My friend had the same problem in his ls civic. He changed the injector and did a complete tune up, still didnt solve the problem. He later found out that his valves were out of adjustment. Hopefully this might help you out

 

i don't think the valves are out of adjustment, because the problem is random and causes a cel

 

after you changed the o2, and you said you still got temporary cels, was it still the o2 cel that you were getting? if not which one, i had a similar problem but it was just that my vtec pressure selenoid power wire was lose in the connector, fixed that and the car ran fine.

 

i am getting the o2 cel, but i do believe that there is a fuel problem because it is random, but i checked those wires just a second ago and they were fine

 

is it at full throttle or part throttle?

 

It was at only full throttle but now its more often and at part thorttle.

 

will obd1 dx injectors work in that b18c1? I have heard all kinda of opinions.

 

got a set of new gsr injectors problem is still not solved?????????

what now

 

did you test the coil?

 

i haven't yet

 

How many miles are on this motor? Sounds like it maybe a couple of different things. If the motor has higher miles like 100k or over. Very well might be a oil pump trying to go bad. That will cause a check engine light and cause VTEC to not engage and the car to run funny. The other thing is the ECU like you had earlier mentioned.

 

i think i tracked it down to some broken wires in the harness

 

ok i think i figured it out, i talked to a few guys from import autoslavage when i was picking a motor up for a friend and there tech ricky things it is what is called limp mode. I have never herad of it before, but he GAVE me another ecu to try but ti didn't help, so i must be a damaged wire in the ecu . But once again thanks everyone for the help, and i would recommend import auto salavage to anyone.