so i finished up my jdm 96 spec b18c-r into a 00 civic dx.... used the itr ecu it came with and a 00 civic si engine harness with jumper harness...

car was working fine for a week... EVEN in 100+ degree weather.... now all of a sudden today the car started sputtering around 3k rpm like it was about to stall out and die.... it wont do it constantly but prob like every other time i start/stop the car.... there's NO CEL on whatsoever and is NOT overheating...

anyone ever experienced this.... or know of any possible solutions?

 

Is it also doing it right before vtec?

 

no... vtec in the 96 jdm b18c is 5800.... itll do it at low rpm 3000 and below....

 

? I had a similar prob in a gsr swaped hatch i did. I took off all the grounds and cleaned them with a wire brush and cleaned the frame where the grounds blot. Cleared it right up.

 

ok...will try.... i know theres the tranny ground and the valve cover ground... is there any other places it grounds at?

 

fuel pump might be goin out? How are the spark plugs?

 

ok cleaned all the ground wires.... still sputtering not as much i figure cuz its night time.... checked plugs they were replaced about a week ago....the are fine no oil on them....

 

? Damn. You dont have a bad coolent temp sensor do you. Some time if they go bad they keep your car in limp mode.

 

the car was running really rich.... so i was like wtf.... not fuel pump...getting plenty of fuel....so i started thinking why would it be dumping so much fuel into the engine.... then i figured the o2 sensor was bad... so i changed it out..... and it runs perfect.... made the 1000+ mile trip for NorCal to Texas no problem....

 

an o2 sensor can make your car run rich? How?

 

well a mechanic told me if the sensor wasnt rading the exhaust gasses right or at all... the ecu will think its running lean... therfore dumping in more fuel.... i was getting too much... havent had a problem with it since

 

If the O2 sensor doesnt read any info, it will go into a "limp mode" which basically means the ecu makes the car run rich for safety.

 

i was close.... but what he said! lol