I have been chasing a rough idle issue for the past couple of months and it is killing me! I have researched this issue and have exhausted all of the threads and can't really get to a solution that doesn't require deep mechanical knowledge or a relatively large amount of money.
I have thrown the usual "easy" solutions at it - new plugs, cleaned IAC and throttle body, run fuel system cleaner through it - but to no avail.
Jeep isn't throwing any codes. Here's what's going on.
Symptom #1: Will idle roughly at a standstill. Barely perceptible but definitely there. Intermittently worse some times than others. Could just learn to live with this except for Symptom #2. See below.
Symptom #2: This is what is weird. After backing the Jeep into a parking spot or my garage, it really bogs down and threatens to quit. Sounds horrible and can't be good for it. After about 15 - 20 seconds of sounding like it's struggling to keep running, it goes back to idling *almost* normally much like it does in symptom #1. By the way, the extent of the struggling varies and I can't correlate it to any specific conditions (heat, length of time running the Jeep before reversing it, etc.)
I will say that these issues don't seem to exist until after the engine warms up.
I have had 3 separate mechanics look at this and they agree they can feel it but can't get to the source of it without it getting expensive. One guy mentioned the O2 sensors which I will tackle next but I wanted to throw this out there to the community in case anyone has had a similar issue, especially if it relates to REVERSING the Jeep.
Help!
Thanks.
I have thrown the usual "easy" solutions at it - new plugs, cleaned IAC and throttle body, run fuel system cleaner through it - but to no avail.
Jeep isn't throwing any codes. Here's what's going on.
Symptom #1: Will idle roughly at a standstill. Barely perceptible but definitely there. Intermittently worse some times than others. Could just learn to live with this except for Symptom #2. See below.
Symptom #2: This is what is weird. After backing the Jeep into a parking spot or my garage, it really bogs down and threatens to quit. Sounds horrible and can't be good for it. After about 15 - 20 seconds of sounding like it's struggling to keep running, it goes back to idling *almost* normally much like it does in symptom #1. By the way, the extent of the struggling varies and I can't correlate it to any specific conditions (heat, length of time running the Jeep before reversing it, etc.)
I will say that these issues don't seem to exist until after the engine warms up.
I have had 3 separate mechanics look at this and they agree they can feel it but can't get to the source of it without it getting expensive. One guy mentioned the O2 sensors which I will tackle next but I wanted to throw this out there to the community in case anyone has had a similar issue, especially if it relates to REVERSING the Jeep.
Help!
Thanks.