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GMC Jimmy Starting and Stalling Problems

231 messages,  Last post on Nov 13, 2009 at 1:49 PM

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#191 of 231 Re: PLEASE HELP! 95 JIMMY [jonnyring] by my4littleangel Mar 22, 2009 (12:42 pm)
Replying to: jonnyring (Mar 22, 2009 4:30 am) Thanks. Ill try that. yep, it also stalls in overdrive. I have had 2 different shops tells me the codes keep coming back that I need a new fuel pump. After replacing it twice, I furiously fought against replacing it a 3 rd time. (Within a 3 month period) I will ask them to check out the temp codes. I think I really just need a good mechanic in my area and have failed to find one!   Thanks for any and all advise! I really appreciate it!
#192 of 231 98 GMC Jimmy rpms drop while driving by 446duster Apr 28, 2009 (4:19 pm)
When driving some times the rpms just drop and the motor ulmost dies and then the rpms will come right back up like nothing ever happened and other times it will just die. This happens intermitently, some times at highway speed and other times while sitting at a light. The check engine light does not come on. It has about 130k on it. I hooked a fuel pressure gauge to it and there is no pressure drop when this happens. I also put new plugs and fuel filter in it and it still happens. I took it to a shop and they are not sure either but said somethng about there being distributor problems with these. Any help would be greatly appreciated. Thanks Its a 4.3 4x4
#193 of 231 Re: stalled and wont start [firetruckie] by goincray May 19, 2009 (4:50 pm)
Replying to: firetruckie (Sep 12, 2006 9:07 pm) I am having the same problem. It will run fine for a week and just shut off. I had the fuel regulator and the spider assembly replaced. The fuel pump was replaced in Sept. My mechanic seems like they have no idea now. Did you ever figure it out? It will shut off while driving with no check engine light and it will do it sitting at a light.
#194 of 231 2000 Jimmy stalls out driving and stopped at a light by goincray May 19, 2009 (5:13 pm)
Sept 08 got a new fuel pump- 4-09 started to stall out while driving. No check engine light. Took it in, no codes,took it home. Drove it again stalled out and wouldnt re-start. Got it towed and it started again when it got to the shop. Needed a new fuel regulator 30psi and a new fuel filter : . Good for a week after being replaced. Started again, now needs a spider assembly. ran all day, stalls again at 10 psi???? Any CLUE?? Replies to this message: jonnyring (May 20, 2009 2:55 am)
#195 of 231 Re: 2000 Jimmy stalls out driving and stopped at a light [goincray] by jonnyring May 20, 2009 (2:55 am)
Replying to: goincray (May 19, 2009 5:13 pm) This is a PITA, but on the fuel rail up to the engine there is a valve with a cap on it. Remove the cap and install a fuel pressure gauge. I think you need 70lbs. or somethin'? It can be done in 2 minutes. Install gauge..crank and look at pressure (through windshield with hood up).  I bought a gauge with screw on fitting at a Napa, or Adv. Auto. Check the fuel pressure real quick next time it dies. My wife's 2000 just up and died. Towed it home...replaced filter. Nothing. Then bought the guage. It told me 4 lbs pressure. Got a fuel pump assy. with sender from a junkyard for $100. (I had already dropped the tank and replaced the bad sender once.) Replaced fuel pump assy and all is good. Sometimes these pumps can be intermittant (especially on the older cars...you rap on the metal tank with a block of wood and it'll start and run for awhile).   Guage setup/location:     I tested the junkyard pump and sender in this fashion before installing in tank:     Guage and pump check fine:
#197 of 231 2001 GMC Jimmy Starts great,but will not restart after warm up. by nickjax Jun 26, 2009 (10:00 am)
2001 GMC Jimmy/4.3L Vortec/4X4.   When I first start the Jimmy it fires right up. While driving the engine runs great,and even better now with all the new parts. I park it then try to re-start it. It only cranks and does not fire back up. I could drive it for hours,but when I stop and shut it off. It will not start back up. It will start again if I wait for 20 or 30 min. When I shut it off after that,still no start up,just cranks. I have so far replaced,the fuel pump,fuel filter,the map censor,the crank censor,EGR valve,air filter,all plugs,all wires,the whole distributor assembly,and the oil. I took off the coil,and the ingintion module. I brought them to autozone and had them run a test on them. All checked out fine. During the problem I checked for spark. There is spark,but still will not start up. The timing is great.This is the EDI ignition. Can't adjust the timing after the installation of the distributor.   Can't figure this one out. Anyone on here had this same problem? The check engine light never has turned on. Is there a part in the fuel system that heats up that will cause it not to restart? It will start and run fine in wet weather too. Will not restart after warm up. Replies to this message: kenneyg (Jun 30, 2009 2:29 pm) my4littleangel (Jun 30, 2009 7:38 pm) jonnyring (Jul 01, 2009 3:54 am) steelerfan67 (Jul 29, 2009 8:50 pm) jonnyring (Jul 30, 2009 3:06 am)
#198 of 231 Re: 2001 GMC Jimmy Starts great,but will not restart after warm up. [nickjax] by kenneyg Jun 30, 2009 (2:29 pm)
Replying to: nickjax (Jun 26, 2009 10:00 am) Hi there, I'm Kenney and live in Oregon and have an elderly man that is like a father to me living in Ark. that has this very same problem that you seem to be having . I was curiouse if you ever found out the problem with your rig so that I may be able to help my good friend back home. I'm sorry not to have the info for what has been already done. All that I can say is that it was put on a scope and nothing was found to be wrong with it. Thank you for any help you may be able to help with. kenney for Edgar   197 of 197 2001 GMC Jimmy Starts great,but will not restart after warm up. by nickjax Jun 26, 2009 (11:00 am) 2001 GMC Jimmy/4.3L Vortec/4X4.   When I first start the Jimmy it fires right up. While driving the engine runs great,and even better now with all the new parts. I park it then try to re-start it. It only cranks and does not fire back up. I could drive it for hours,but when I stop and shut it off. It will not start back up. It will start again if I wait for 20 or 30 min. When I shut it off after that,still no start up,just cranks.     Can't figure this one out. Anyone on here had this same problem? The check engine light never has turned on. Is there a part in the fuel system that heats up that will cause it not to restart? It will start and run fine in wet weather too. Will not restart after warm up. Replies to this message: my4littleangel (Jun 30, 2009 7:38 pm) jonnyring (Jul 01, 2009 3:54 am)
#199 of 231 Re: 2001 GMC Jimmy Starts great,but will not restart after warm up. [kenneyg] by my4littleangel Jun 30, 2009 (7:38 pm)
Replying to: kenneyg (Jun 30, 2009 2:29 pm) They ended up replacing the central port fuel injectors, now the car runs like a top! Perfect! It is the second time I have had to have that replaced, so I am worried if it will go out again.
#200 of 231 Re: 2001 GMC Jimmy Starts great,but will not restart after warm up. [kenneyg] by jonnyring Jul 01, 2009 (3:54 am)
Replying to: kenneyg (Jun 30, 2009 2:29 pm) FWIW...   One thing I replaced once was the temp. sender to the COMPUTER.... NOT the sender to the temp. gauge/light. It was inexpensive ($10-$12? Autozone). Once the truck was up to temperature..the Computer temp. sensor/sender was telling the computer to not let the truck re-start. That solved my problem when the truck would not restart after getting up to temp.

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