HELP: Idle goes up and down after not starting up for 2 weeks

[peter91]

Just came back from a 2 week holiday and decided to give my car a spin today. For some reason, when i stopped at a traffic light, the idle of the car keeps jumping from 3000 RPM down to 1500 RPM. its continuous until i take off but reoccurs when the car is stationary.

How can I fix this?

[butter]

What car is this?

What mods do you have on the car?

Is it tuned?

[peter91]

What car is this?

What mods do you have on the car?

Is it tuned?

EP3R

mods: CAI, full cat back exhaust with headers.

Car isn't tuned. full standard ECU

[eskimo_firefighter]

Maybe try clean your IACV (idle air control valve) using throttle body/brake cleaner/degreaser.

[iVTEC_R]

Maybe try clean your IACV (idle air control valve) using throttle body/brake cleaner/degreaser.

+1

The IACV might be sticking, causing erractic idle

[DaRKNT]

It could also be a vacuum leak. Had the same issue recently and found that the vacuum hose for one of the emisssions assist valves had come off.

[knobosaurus]

+1

The IACV might be sticking, causing erractic idle

9 times out of 10 it's this. The IACV tends to seize up if not used.

[peter91]

thanks for the input guys. Well I've been driving the car for 2 days now and the problem is gone now.