Question about 1995 GMC Jimmy

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1995 jimmy I can't find where to hookup the pressure gauge to do a pump pressure test

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At the back of the engine where the fuel rods met the engine by the fire wall

Posted on Aug 22, 2008


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My gmc jimmy truck starts when I spray starter in the carborator but it just dies once the fumes in the carburetor wear off

Probably the fuel pump. When you stand outside the vehicle and turn the ignition on, you should hear the pump in the fuel tank working for a few seconds - if not, there is a problem with the pump, the pump relay, the fuse, etc. You can also check the pump fuel pressure with a gauge attached to the service port on the fuel line at the back of the engine (caution - use an approved gauge and hookup!).

If the pump is working, check the fuel filter for plugging. The problem can also be caused by a faulty fuel regulator (inside the upper manifold).

Mar 15, 2015 | GMC Jimmy Cars & Trucks

1 Answer

The jimmy seems to spit and sputter when excelarate

This culprit can be a bad cam sensor, bad fuel filter, or weak fuel pump, or fuel pressure regulator valve. Or simply a clogged misfiring or just bad injector. By testing your fuel pressure first and seeing if after a while the fuel pressure has not dropped in the fuel rail test for say 30 mins. If the pressure stays up that test eliminates the fuel rail pressure regulator. If the pressure coming in is weak all together your filter or pump is bad. If the RPM gauge does not move when this happens it is the crank sensor. If when cold it runs fine and starts running worse after warming up check the cam sensor. There you go need any help ask for me.please rate my solution it is how i earn my achievements. Thanks in advance.

Apr 13, 2012 | 2000 GMC Jimmy

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I have a 95 Jimmy. The oil pressure gauge suddenly dropped to 0. The vehicle runs fine and the oil was recently changed. Any idea what to check? or look for?

Hello dogcollector: My name is Roger and I will help with your question. First if the pressure went to zero and the engine did not lock up or start knocking? I would replace the oil pressure sensor or check for a broken wire in the sensor area. I would also perform a oil pressure test. This is done on a cold engine through engine warm up to a hot engine. This will tell you if there is a major mechanical problem or just a bad sensor. Even if you just replace the sensor I would still have the pressure test done as this will give you a good idea of engine bearing problems. Should you need further help please just ask. Please rate the answer. Thank You for using Fix Ya. Roger

May 19, 2011 | 1995 GMC Jimmy

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1995 GMC Jimmy 3.5L HO - lots of engine clatter, very low oil pressure - 10-30 on dash gauge from idle to 3000 rpm, oil full. Oil pump problem or major repair??

if the noise is coming from the oil pan you may have bad rod bearings or main bearings or the oil pick up tube could have also came loose but since you have oil pressure im gonna say your looking at replacing or rebuilding the engine witch is a major repair.

Jan 19, 2011 | 1995 GMC Jimmy

1 Answer

While driving my 1996 GMC Jimmy the check gauges light came on and my car started to overheat. After I stopped and tried to restart the car, the car would not turnover the only sound it was making was a...

Definitely get the codes read if any. But usually the check gauges light is telling you to monitor the gauges due to a pressure problem. If the oil pressure gauge is high it could mean there is a blockage in the flow from the oil pump to the heads if there is a blockage it will cause the vehicle to over heat (at the least!) It will also destroy the engine! Have a mechanic run a pressure test on the compression, oil pump, and oil flow to the heads.

Jan 12, 2018 | 1996 GMC Jimmy

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Oil pressure gauge fluctuates from high to low. What could be the cause? Remedy?

Hi. This will indicate that there may be some sludge build up in the block, or the oil pressure switch may be damaged. The more serious issue will be a failing oil pump. To isolate the issue, simply, have a oil pressure test ran on this engine. If the test indicates that the true oil pressure is optimal at idle, kindly replace the oil pressure switch. Now, if the test proves that the pressure is indeed lower than factory specifications, this will confirm that the pump is damaged. Have the pump, and oil pump screen replaced, in this case.

NOTE_ I would, also, recommend to have the engine flushed asap.

Jun 03, 2010 | 1995 Ford Crown Victoria

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1995 gmc jimmy-won't accelerate wants to stall

could be the fuel pump will need to do a fuel pressure test on it ..the pressure should be 63 anything lower even so much as a few lbs will cause this to happen well if it sat that long i would consider a complete tune up and check all vacuum lines for dry-rot

Sep 14, 2009 | 1995 GMC Jimmy

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1995 jimmy 4x4 stopped running. mechanic said it was a fuel pump. Changed fuel sending unit, changed fuel pump, changed fuel filter also changed fuel spider about 3 months ago. I have gas pressure at the...

check for dryrotted vaccumm lines or off completely ensure all the fuses are good and make sure you have spark by testing it if you need assistance for this send me a reply back sounds as if the fuel is not getting through at this point

Jul 09, 2009 | 1995 GMC Jimmy

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My truck stalled lights on dash wont come on battery gauge wont work and fuel pump wont come on oil pressure gauge works when turning over have 4 or 5 fueses not getting power and no turn signals but have...

sounds like a ground or power failure you will need to check with a test light from what point to what point you are getting power to etc...then its also from your description possible to do with the electrical system itself i suggest looking for the obvious 1 st then ck for shorted fuses and relays broken worn cracked wires etc that's a starting point also sounds as if the wiper and tun signal armature have a connection to this issue !

Jun 13, 2009 | 1995 GMC Jimmy

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Fuel pump or filter needed

I have same symptems. Fuel pressure tested out at 14psi and should be 60+ I have it on the lift today and this time I'm putting on a AC Delco pump. The one I got from Napa only has 5000 miles on it!!!!

Sep 24, 2008 | 1995 GMC Jimmy

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