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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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#161 of 231 94 gmc jimmy stalling and missing out while driving. by erikandlorie May 26, 2008 (1:18 pm)
I have a '94 Jimmy with 218,000 miles on it. It started missing out and acting like it was starving for fuel. So I changed the fuel filter. It ran fine for a day or so. Then it did it again. This time worse. So I changed the fuel pump and checked the spark plugs. They were firing okay. I test drove it and it was fine. A 1/2 hour later it was just as bad as it started out. Any suggestions of what to do?
#162 of 231 Idol Control Valve by sargrant Jun 09, 2008 (7:21 pm)
I was reading that the ICV could play a big role in the RPM's hunting. My '95 does great while accelerating and at cruise speeds but once you slow down, occasionally, the RPM's hunt and the truck sounds really rough. I know that I have an exhaust leak which I have been told that could be creating a lot of problems with the O2 sensor readings.
#163 of 231 1994 GMC Jimmy No Start by ol69stang Jun 30, 2008 (8:37 pm)
Hi all. I have read all the posts and found my problem duplicated many times but there seems to be something different each time. I wanted to see if anyone could point me in the right direction on my problem.   Engine cranks does not fire. I replaced Cap and Rotor and fuel filter. There is spark at the plugs. I tried spraying carb cleaner into the intake and there was no firing.   Fuel Pressure to the CPI before start is 55 - 58 PSI. During cranking pressure falls to around 40. When I let off the starter the pressure spikes to 55 - 58. If I do not crank it I hear the pump relay click off and the pressure slowly drops to around 20 or so and stays there. Does this indicate a bad pump?   Thanks Replies to this message: ol69stang (Jul 01, 2008 7:31 am)
#164 of 231 Re: 1994 GMC Jimmy No Start [ol69stang] by ol69stang Jul 01, 2008 (7:31 am)
Replying to: ol69stang (Jun 30, 2008 8:37 pm) Update:   I tried the carb cleaner thing again and got some response. It was trying to fire.   Vehicle info: 1994 GMC Jimmy 4.3 V6 CPI VIN code W stock condition AT   SES code 32....EGR. This is intermittent.   Thanks
#165 of 231 Re: wont start [repairdog] by etubbs Jul 10, 2008 (7:36 pm)
Replying to: repairdog (Oct 02, 2006 2:42 am) im getten gas to the throttle boty and its not the computer how much pressure should it show on the pressure tesster for the fuel pump and what else could it be it ll start with either but thats it its a 97 jimmy 4.3 gimmie sum ideas please thanks ed
#166 of 231 Re: wont start [repairdog] by etubbs Jul 10, 2008 (7:43 pm)
Replying to: repairdog (Oct 02, 2006 2:42 am) ive did evrything changed the filter on 97 jimmy 4.3 its gettin gas to the throttle body tested it with pressure guage said 60 psi when cranked it with either just had a tune up the works now it died its not the computer did i use the psi guage right and what else could it be thanks ed
#168 of 231 97 jimmy wont start by etubbs Jul 12, 2008 (12:25 pm)
my 97 jimmy 4.3 v6 keeps on blowing relays now it wont start at all could somone help me tell me what to look for now ............thanks ed
#169 of 231 2000 GMC Jimmy Starting Issues by sknight1 Jul 14, 2008 (4:24 pm)
HELP! I have a 2000 GMC Jimmy. About a month ago the fuel pump went out. Got that and the fuel filter replaced. Ran good for about 2 weeks then it died on me going home from town. Let it sit over night as 2 tow bills later I was stuck. Went back the next morning and it started just fine. Now the darn thing, will start once it sits for about an hour after being ran, but once ran (Even just a couple of blocks) will not turn back over. I have had a mechanic come to the house 3 times but it doesnt act up when he is here, and had a diagnostic ran on it and it doesnt throw a code. Does anybody have any clue as to what might be wrong? Replies to this message: etubbs (Jul 14, 2008 10:41 pm)
#170 of 231 Re: 2000 GMC Jimmy Starting Issues [sknight1] by etubbs Jul 14, 2008 (10:41 pm)
Replying to: sknight1 (Jul 14, 2008 4:24 pm) wish could help u more but it sounds like a cobe found under the hood on passengmputer problem should er side looks like a black box try replacing that or it could be the coil pack module ull find it on the side passenger try replacing it get it from a junk yard lots cheeper there not high stuff and trace ur wires see if you got any naked i no it s a lot but its worth it let me no what u come up with ed

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