idle

  1. Jt223

    Revving idle problems

    Hello all, So I had a couple of codes pop up a month or so ago. Misfire on cylinder 5, a couple of O2 sensors and a failure to reach idle code. I replaced spark plugs, O2 sensors, and things were good for a bit. Haven't thrown a code since. But I am having this weird revv problem. It runs fine...
  2. M

    Jeep TJ intermittent surging idle and stalling

    I’ve recently had some issues with my 2004 Jeep wrangler rubicon that I was looking for some help with. Since I purchased the vehicle, I’ve had a very loud whistling sound that I assumed to be a vacuum leak. I replaced the throttle body as that’s where a majority of the smoke came out of when...
  3. MorganMacc

    Clicking/Buzzing When Stopped

    Hi sorry I know there are like a million threads on clicking noises but I can’t really find one that sounds like mine. Had 3 or 4 JKs that were leases & recently bought a ‘98 TJ with ~ 77k miles on it from a classic car dealer in PA. Had some trouble starting it up initially but turned out to...
  4. J

    Jeep won't idle when at full stop

    Hey everyone! I'm hoping I can get some advice from you all. Today after doing some work on my Jeep TJ I took it for a drive. I stopped for a moment and turned it off and when I turned it back on the Jeep could no longer hold idle and would stall. This was not an issue before the work I did or...
  5. NigelTheTJ

    Engine Squeal Fixed

    Hey Guys & Gals, I'm not sure if this is the right place to post this, but I wanted to share how I fixed a squealing noise from the engine bay of my '02. A little backstory, about 3-4 months ago I started hearing a noise from the passenger side of my front end whenever I would start it up in...
  6. Lowcountryearl

    Idle issues

    98 TJ, 173k 5 sp manual,,starts fine, idles fine about 825 rpm, when driving at the point of shifting and the clutch goes in the rpm's don't fall as much as I would think they should. Coming to a stop sign if you push in the clutch it starts off about 1500 and comes down to the normal idle after...
  7. G

    Idle Problems

    I recently rebuilt the engine in my 98 TJ with the 4.0. New pistons, lifters, push rods, gaskets. My buddy cut the exhaust off literally right after the manifold and before the Cat. I’m faced with an idle problem. When it warms up it idles around 1500-1700 sitting, and can get up to 2000 with...
  8. RayDaJeeper

    01' 4.0 wrangler misfiring

    Hello, I’m in need of some help with my 01’ TJ. I’ve had an engine light for my Cat converters about 6 months now but was told by the auto parts guys it was nothing to worry about... well lately I’ve been having issues and I’m thinking I should have worried. On cold starts it starts and runs...
  9. mgroeger

    Rough idle after short shuts downs

    This just started happening a few days ago. The Jeep is running great, idles smooth, no problems. I shut it off, go run in a store, come out around 5 or 10 mins later, fire it up and it idles like crap. I goose it a little and it sounds like crap, almost like it's running on five cylinders. Then...
  10. 02GreenTJ

    High Idle When Cold (I know this is normal for some)

    Hey guys the other day my jeep started idling high when it was cold (1000 rpm) and after it warms up it goes down to 500. I already cleaned the IAC with no results. Just seems weird as it has never done that before even when cold.
  11. Matthew Keller

    P1604 headache

    I can't seem to win with my TJ. Just fixed a few issues and now I'm throwing a p1604 code. This is a communication issue apparently with the computer. I just completely removed and cleaned my throttle body and IAC so I'm thinking something during that processes may have caused this problem. The...
  12. tank

    Not Getting Fuel

    I've got a 97 2.5. I was getting a p1294 about not reaching low idle rpms. Read some threads that said either the IAC is stuck/needs to be replaced or I have a vacuum leak. I sprayed some throttle body cleaner through it while it was running, giving it some gas so it wouldn't die and some...
  13. T

    99 Wrangler 4.0 Rear Main Seal Leaks at Idle

    Gents, I recently acquired a 99 TJ wrangler (RHD) with the inline 6 and five speed transmission. The car is twinlocked, lifted. 32 inch muddies, spotties, rear bar, rock sliders, hardtop etc. etc. etc. with less than 140,000km (or less than 90,000 miles). The car drives great, no fluid leaks...
  14. Tj04

    Low rpms on a 2004 tj

    I have a 2004 TJ, 4.0 sport 5 speed manual. 30 inch tires, no lift. Just replaced TPS and IAC after check engine like error code p1294 I think. (wasted money. Did nothing :BangHead:) cleaned out throttle body, still get a rough idle. Doesn't stall or anything. There was a lift in it that was...
  15. Forty

    Throttle body butterfly valve

    so today I took on the task of cleaning my throttle body. As usual I have to take it to the next level. I pulled the butterfly valve and set screw that hold the plate open just enough for idle. Now I have no clue what the gap needs to be between the butterfly valve and the throttle body. I...
  16. Wyeth Bernardin

    Rpm falling below idle at stops

    Hi, I have a 97 Wrangler 2.5 and recently when I stop or slow down suddenly the rpm will fall below idle. It drops to about 500 rpm. I have read that it could have something to do with the exhaust but I don't want to go tearing apart the engine to find nothing. Looking for a quick fix because...
  17. Wes london

    Stalling in drive through

    Ok so on top of the key switch problem, There is a random stalling while trying to go through a drive through. Replaced plugs and still does it. Cleaned out throttle body. Still persists. Ordered tps and map sensor. Wrong ones came in. Few months ago I replaced the muffler and catalytic...
  18. Chris

    How to clean your IAC (Idle Air Controller) valve

    If you're experiencing idle issues on your Jeep Wrangler TJ the most likely culprit (and the first thing you should check) is your IAC (Idle Air Controller). Often times the IAC gets very gunked up causing the Jeep to idle improperly. A simple cleaning is usually all it takes to get it running...