98 Honda Civic DX 1.6L Surging Idle
#12
Ok, I checked the voltage. It's .48 closed and 4.7 fully opened. There was a smooth transition from close to open too. I don't know how to check the ohms though. The signal wire was reading 5.4v from the ECU.
#17
Sorry it took so long to respond. I couldn't figure out how to read the ohms on my meter. I went to the junckyard though and bought a new throttle body, with a new TP and MAP sensor. Same thing happens. The code goes away for a day or two and returns. I've also clean my PCV valve and run Seaform through the intake system again. I've bleed my coolant system several times, and can't find a vaccum leak. The surging idle goes away when I adjust the idle screw in the TB, but eventually the code returns (p0505). I've also had the cylinder 1 misfire code pop up once or twice (p0301 and all cylinder misfire p0300)
#18
I have a 98 Civic DX that has a surging idle. The CEL code is P0505. I cleaned the throttle body and IACV several times and bought a used IACV at the junkyard; still didnt work. I bought a new IACV, the problem was fixed for a few days and now has gone back to surging. I have checked for vacuum leaks and bled the coolant system. I replaced the ECT because someone told me that could be a problem. The idle problem only starts when the car warms up. If I remove the TPS and MAP sensors, the problem stops. Obviously I get two new codes once I pull the sensors. If I clear the codes while the car is idling, it starts surging again.
I also have another problem that I'm not sure if its related or not.
While I'm driving, if I let off the gas while in gear, the car jerks. When I push the gas pedal again it jerks as well. It doesn't happen all the time and only happens when I let off the gas and initially push the pedal. I have replaced the engine and trans mounts.
I would appreciate any help, Thanks.
I also have another problem that I'm not sure if its related or not.
While I'm driving, if I let off the gas while in gear, the car jerks. When I push the gas pedal again it jerks as well. It doesn't happen all the time and only happens when I let off the gas and initially push the pedal. I have replaced the engine and trans mounts.
I would appreciate any help, Thanks.
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chadzeilenga
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03-20-2007 08:10 AM