Hi everyone. I've got a 1995 civic 1.6L vtec d16z6. My issue I believe lies with the idle air control valve but its a strange symptom. In park or neutral ONLY, the car doesn't know where to idle at. It revs up to 1600 rpm's then throttles back down to about 800-900 rpm's and the back up again. Basically it doesn't know where to idle at so it repeats that action until I with put the transmission in gear OR I turn the headlights on. Running lights have no affect on the idle. Any idea's? Thanks in advance and I'd be happy to provide any other known info if needed.

 

CEL codes?

Clean the IACV and FITV, and also bleed the cooling system.

 

I have a d16y8 on my 97 coupe and it was doing that and it could be a vacuum leak but mainly it's was the throttle position sensor (TPS) it's about 76 at autozone might be able to find it cheaper online

 

Okay sorry for the leave of absence. The cel is 15. So to this point I have found that the idle screw was backed out to far. I tightened it with the engine warm and set it to 650-700. I've replaced the pgm-fi module; the electrical portion of the ignition switch. The idle screw seems to have solved the "idle search". After I installed the ign. switch I still got cel 15 along with rapid flashing of the SRS lamp. Is a reset of the cel memory in need or will it reset itself?

 

Reset the ECU to see if CEL code 15 repeats.

https://honda-tech.com/honda-civic-d...lists-1901557/

 

Okay, I did the reset according to the thread you posted. The CEL is steady on when I have the 2p connector jumped and the srs lamp is steady flashing. If I read the thread correctly this is means all things are good, right?

 

CEL steady on with the jumper in place means there are no CEL codes stored.

SRS light should stay out while driving with the jumper out.

 

Do the jumper trick with the car running, in park or neutral.

 

With the service connector jumped, the SRS light is blinking trouble codes for the airbag system.