Hi everyone...I've been trying to figure out whats wrong with my car for the last few days. I have a 2000 Civic Dx hatch with a turbo'd 94 GS-R swap (running the OBD1 p72). This will be the first time on the road since the swap.
The problem is exactly what the topic says, when idling, it fluctuates up and down, sometimes it will stall itself out it goes so low. (Will 90% of the time when the motor's up to temp.). When accelerating lightly, it lacks power, and you can feel the engine missing sometimes. When you partly open the throttle, sometimes nothing happens until say 15-20%.

I spent the better part of yesterday [freak]ing with the TPS (3 actually). Turns out they're all fine, giving accurate, smooth readings.

-I replaced the MAP sensor with a known good one.

-Verified proper IAT resistance.

-Changed ECU's to a P06 Automatic , no change.

-Set timing.

-Tried to adjust the idle screw, but it has no effect, and when you pull out the IACV anyway (as the manual says to), it definitely stalls/will not idle.

Tomorrow I'm going to:

-Check/change spark plugs

-Change fuel filter

-Swap injectors

-Clean/inspect IACV

I may frig with my IAB wiring....try and get them to work, and test the ICM.


Anybody have anything else to add to my list of possible causes?

 

I have the exact same problem on my 98 integra ls vtec. Could you let me know if you figure out whats wrong?

 

is it only sputtering while accelerating? misfire whie idling?

 

You may just need ot clean the idle air control valve. I had the same problem pop up about a month ago. No cel. Just sputtering, misfiring, and rough idle or dying. Cleaned the IACV and no more problems. Try it and see if it works.