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Jeep Cherokee Start Stall Idle Problems

180 messages,  Last post on Nov 18, 2009 at 5:07 PM

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#137 of 180 Re: 1990 Jeep Cherokee 4.0 - Hard Start - Backfire in gear [lunghd] by magicmaster Aug 12, 2008 (9:45 pm)
Replying to: lunghd (Aug 10, 2008 6:48 pm) Spot on.. I actually replaced my fuel pump assembly and a fresh fuel filter this last weekend. I noticed that I had no pressure at my test port on the fuel rail after an attempt to start. Fuel pressure was a little over 15 lbs with ignition on and was suffering from pretty bad leak down, losing pressure fast. Now it starts within 2 seconds of cranking and has plenty of power, enough to powerbrake with ease (my neighbors could tell I was happy Fuel pump was definitely my problem..
#138 of 180 95 Jeep GC 4.0 Stalling under throttle by danrhodes Aug 24, 2008 (12:23 pm)
I have a 95 Jeep GC, 4.0 6 cyl, auto. I have recently replaced the starter, battery, and did a full tune-up. I am having problems with it stalling while in any gear other than Nuetral or Park while I am pushing on the throttle. It will idle fine while in gear and I can rev it up to redline with no problem when it's in N or P. Please help with any ideas. Thanks Replies to this message: lunghd (Aug 24, 2008 2:49 pm) magicmaster (Aug 24, 2008 11:28 pm) lisamarier (Sep 17, 2008 5:24 am)
#139 of 180 Re: 95 Jeep GC 4.0 Stalling under throttle [danrhodes] by lunghd Aug 24, 2008 (2:49 pm)
Replying to: danrhodes (Aug 24, 2008 12:23 pm) Sounds like the idle stepper motor (IAC) located on the throttle body. They get gummed up & can fail to open and / or properly seat. It's usually a 'free fix' - remove & clean it with some good carburetor cleaner spray.   Wait a minute - I just re-read your post... Let me double check my understanding:   Idles well while in Drive or Reverse... but does not rev up? Revs up in Park or Neutral.... but will not idle?
#140 of 180 Re: 95 Jeep GC 4.0 Stalling under throttle [danrhodes] by magicmaster Aug 24, 2008 (11:28 pm)
Replying to: danrhodes (Aug 24, 2008 12:23 pm) Check my post right before yours.. I had the same symptoms. It was my fuel pump. Would seem to idle ok and could rev it up in Idle and Park no problem but when put into gear, immediately began running rough and would back-fire when throttle was applied and/or stall out. Check your fuel pressure. Replies to this message: lisamarier (Sep 17, 2008 5:24 am)
#141 of 180 2000 Grand Jeep Cherokee 110 miles by lisamarier Sep 17, 2008 (5:04 am)
I recently had the fuel pump and 2 sensor changed. When the jeep is idle in park it runs fine however when I brake, it feels like it will stall but it doesn't. The engine light is on and the mechanic said I should bring to Jeep for testing. Other than that it seems to be running fine. What could be making the car sutter when braking? We did have tons of fan issues but the car is fine and doesn't over heat anymore. The mechanic couldn't fine anything wrong??? Any ides before Jeep charges me a fortune for nothing. Thanks!
#142 of 180 Re: 95 Jeep GC 4.0 Stalling under throttle [magicmaster] by lisamarier Sep 17, 2008 (5:24 am)
Replying to: magicmaster (Aug 24, 2008 11:28 pm) I did have the fuel pump changed. How do you check fuel pressure??   Thank you.
#143 of 180 by lunghd Sep 17, 2008 (2:17 pm)
Checking fuel pressure is with fuel pressure gauge attached to schrader valve on fuel rail - it's a lot easier than it sounds! You can 'rent' a pressure gauge at AutoZone or have it checked by a mechanic.   As to the stutter when braking: check your brake booster vacuum hose. Also a possibility that the booster has an internal rupture though not common.   Idle air controller (idle stepper motor) located on throttle body could be sticking as well & is a common pest with idle issues. Easy enough to remove from throttle body & clean.
#145 of 180 2001 Jeep Grand Cherokee sometimes stalls in reverse...help? by nikki07 Sep 24, 2008 (2:41 pm)
I have a 2001 Jeep Grand Cherokee with about 168k on it. It runs fine in drive and neutral, but sometimes when i put it in reverse the engine completely cuts off. Usually if i wait a couple minutes and try again it works fine. Also, when on long car trips on the highway, the "Trans Over Temp" light on the dash comes on. I checked the transmission fluid dipstick and there is plenty in there, and there is also plenty antifreeze. Any advice? Replies to this message: tuggajb (Oct 12, 2008 1:13 pm)
#146 of 180 96 Grand Jeep Cheerokee by dchez6969 Oct 12, 2008 (5:19 am)
We are experiencing problems with our Jeep! The mechanic can not figure it out! The Jeep will sometimes start and run fine and then other times it will start but sputter and almost stall untill warmed up, or will start and stall after a few mins of driving, and not start but turnover. Also the other day the information screen started flashing and every possible indicator went on at the same time and then it backfired, after that it drove great for a day. Now its back to same routine. we think it is something electrical. We just don't know what any think will help! Replies to this message: interditx (Apr 27, 2009 9:09 pm)

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