Question: Need Help!!!!... TJ Idle Issue
Hoping for some help/insight -- suggestion!
1999 Sahara 4.0l 6cyl a/t
***Idle issue: [i think!]
- when I shift from "drive" to "park" the idle sometimes revs upwards of 2500 rpms. Trying to kick it down rarely has any effect. When I shift there's usually quite a clunk - and if I don't have my foot firmly on the brake the thing might just slam into the car parked in front of me [more on this below].
For the most part, doesn't happen on cold start - but jeep doesn't need to be warmed up for it to happen [ie. i can start it when cold, drive 100 feet, put it in park and it could happen].
Problem has gotten progressively worse used to happen on occasion - now happens more times than it doesn't.
- other symptom [which i assume is related and made reference to above]: once I take my foot off the brake [when in 'drive' or reverse and stopped] - the jeep takes off on its own.
this started happening about the same time that the high rpm issue got worse. I've basically wore down my brakes just from sitting at a stop light.
Had someone tell me its likely a vacuum leak and I should let the engine run and spray carb cleaner all around the intake to check? [no idea if this is the thing to do]!
Also have read that it's likely either the IAC [which should be pulled and before buying new] -- or the TPS.
Any troubleshooting advice or diagnostic expertise would be greatly appreciated.
And if there is any other info you need in order to nail it down, please ask!!!