After driving and coming to a stop and pressing the clutch my jeep will sometimes idle at about 2200 rpms. If I rev the engine it will settle back down to normal idle speed about 750. No CEL or codes. I've tried using propane around all the vacuum lines and fittings and not finding any leaks. Any ideas what else to try? 06 4.0 6spd
High idle while pressing in clutch
- Thread starter Jodh
- Start date
Hopefully it's just a dirty IAC. Try cleaning it:
https://wranglertjforum.com/threads/how-to-clean-your-iac-idle-air-controller-valve.662/
If it's not that, it could be a faulty TPS (throttle position sensor). If you decide to replace it, make sure you only use a Mopar sensor. I know the price is significantly more, but store brand sensors rarely, if ever, work well in TJs.
https://wranglertjforum.com/threads/how-to-clean-your-iac-idle-air-controller-valve.662/
If it's not that, it could be a faulty TPS (throttle position sensor). If you decide to replace it, make sure you only use a Mopar sensor. I know the price is significantly more, but store brand sensors rarely, if ever, work well in TJs.
Do the RPMs only rise when you use the brake pedal? If so it could be a brake booster issue.
You might consider a smoker test of the vacuum lines:
https://wranglertjforum.com/threads/cheap-engine-vacuum-leak-tester.19643/
I would guess IAC or some other issue first, though
You might consider a smoker test of the vacuum lines:
https://wranglertjforum.com/threads/cheap-engine-vacuum-leak-tester.19643/
I would guess IAC or some other issue first, though
I pulled the IAC off and cleaned it. It wasnt that dirty since I cleaned it about a year ago along with the throttle body. It did it once on my way to work today. I'll try that DIY smoke machine. Let you know what I find. The problem is it's so intermittent when it does it. Sometimes when I stop sometimes just driving and shifting gears. Most of the time its normal.