Last post on Apr 25, 2013 at 2:17 AM
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GMC Jimmy, Engine, SUV
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#293 of 301 99 Jimmy vapor lock when it is hot outside.
Sep 24, 2012 (10:21 am)
When it is hot outside, I have to drive with the gas cap off. Recent;y with cap off I am vapor locking. This is new.
When it is hot if i leave the gas cap on the car will vapor lock and a whoosh of air comes out of the gas tank when I open the cap. Gas is also pushed out of the purge valve. I have tried a vented cap same problem.
I can drive the when it is below 75 degree outside with the gas cap on. Gas mileage is perfect, no pressure when I remove the cap.
Parts replaced: sparks, rotor + button, wires, all O2 sensors, new fuel tank, pump, fuel lines, fuel filter, evap charcoal canister, evap purge cylinder, and the evap part by the carburetor.
In the past it has given a p1352 code with the vapor lock condition.
#294 of 301 1993 GMC Jimmy start and stall problems
Sep 26, 2012 (9:33 pm)
Hi,I have a 1993 GMC Jimmy that will start and run for a few.maybe 5 minutes at idle but after a few minutes if you hit the gas it will stall out and will not start back up...If you wait say 1/2 hour to an hour it will start back up but stall again in a few minutes...So far i have replaced the gas tank...The gas pump...The gas filter...The gas pressure regulator and the fuel pump relay but it still does the same thing...Any ideas on what else i could try to get this thing running the way it used to run would be greatly appreciated...Only thing i havent tried is maybe loosening the gas cap...I just thought about that...I'm running out of ideas here...Thank you and have a great day...
#295 of 301 98 GMC Jimmy won't start after head gasket replacement
Dec 14, 2012 (9:18 pm)
I have a 98 GMC Jimmy with a 4.3L V-6. My son was driving it and it died on him while driving. Low and behold, there was water in the oil. It sat in the driveway for about 3 months. I finally got around to getting it in the garage, and replaced the head gaskets. I got it all back together, and it won't start. I've replaced the following items: plugs, wires, Distributor cap, rotor, Crank position sensor, cam position sensor, fuel pump. I have tested the ignition coil, ignition control module, and all fuses. And, oh by the way, I had to rebuild the starter as well. I did get it to start one time, with the gas pedal on the floor, but once it fired up, I let off of the gas, and it died. It hasn't started since, or even acted like it wanted to. I'm at a loss, with the exception of a possible timing chain slip. I really don't want to go there. I have poured a little gas into the throttle body, yet still nothing. When I crank the engine, I do hear a little bit of a "flutter" from the exhaust pipe. I'm at a loss. I do have a 5 gallon can of gas, and a match. Any thoughts?
#296 of 301 Re: 98 GMC Jimmy won't start after head gasket replacement [chevydaddy]
Jan 29, 2013 (2:27 am)
Did you get the problem solved?
I have the exact same issue now with wife's 2000 Jimmy. She over heated it , water in oil, barely runs now. Now I'm persuing head gaskets, BUT....
If you're gonna replace the head gaskets....you have to send the heads out for warpage & to be pressure tested for internal CRACKS!!
#297 of 301 Re: 98 GMC Jimmy won't start after head gasket replacement [jonnyring]
Jan 29, 2013 (10:07 am)
Hey I had the same problem three years ago and i replace my head gasket and Fuel pump. That fix the problem. Then two years ago Jimmy did the same again and come to realize we had to cut the Cadillac converts out and when we did you should see how clog it is. Yes the Engine light will stay on but i can look past that. Now we are battling break light switch. Hope this helps.
#298 of 301 Re: 98 GMC Jimmy won't start after head gasket replacement [chevydaddy]
Jan 29, 2013 (10:09 am)
Cadillac convert. I know sounds crazy but that happen to my 2000 Jimmy. Stop running and when we cut them out they were so clog know wonder why it wouldn't run.
#299 of 301 Re: 98 GMC Jimmy won't start after head gasket replacement [jonnyring]
Jan 29, 2013 (10:28 am)
I did get the problem fixed. I replaced the head gaskets, intake manifold gaskets obviously, crank position sensor, cam position sensor, plugs, wires, rotor, and dist. cap. The problem ended up being that I had it out of time. There are "veins" that run through the dist. cap, and I had it aligned incorrectly. Also, I did NOT send my heads out to have them pressure tested or anything like that. One thing to keep in mind, if you had any kind of coolant in the oil, you need to change the oil pump. I have good oil pressure upon initial startup, but once it warms up a little bit, pressure drops to almost nothing. I am in the process of replacing the oil pump, but I have to do it in my spare time, if there really is such a thing as spare time. Mine is a 4x4 and I have to pull the front differential in order to get the pan out. SUCKS!!!!
#300 of 301 cant figure it out
Apr 24, 2013 (9:02 pm)
I have a 95 jimmy it starts fine but after it runs for a lil bit stats to act up and if i drive it it really acts up between 1500 and 2500 rpm. I've replaced the Distributor and the cap new plugs and wires changed out the mass air flow i even tried and different computer i replaced the fuel pump a few years back really not sure what to try next so any suggestions would be appreciated
#301 of 301 Re: cant figure it out [bryanh83]
Apr 25, 2013 (2:17 am)
I too face a similar situation with my jimmy 95 model. After a few miles ride, the rpm goes high during idle. Par year I changed the fuel pump and hence I face this issue. Appreciate any suggestions.