Question about 1994 GMC Jimmy

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How to change a 94 gmc jimmy fuel injector spyder on a 4.3 vortec. What all do you have to take off to get to the spyder?

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You have to take everything of of the plennum and then remove the plennum its self and there she is make sure you have the plennum gasket ( GM part # 10105939 or 032700) ready for when you are done replacing the spyder. GM actually upgraded the spyder set up beacuse it was a faulty set up. Hope this of some assistance to you!

Posted on Oct 23, 2009

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Posted on Jan 02, 2017

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I have a 1994 GMC Jimmy 4.3 vortec 4x4 automatic, and the transmission started to slip, then the battery died, we got it home and it wouldn't start, so we charged the battery and it ran fine for abou


You may potentially have an serious electrical drain in your car circuits. The drain is slow and continuous, draining your battery charge even if you do a start. Check the cabling and look for load on your battery with a Volt meter to check for any charge drainage. Check this as a precaution before replacing any more parts.

Feb 02, 2015 | 1994 GMC Jimmy

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I have a gmc jimmy that will not run it keeps flooding out we replaced the spider under the intake and the fuel presure reg. but still dumps fuel like a stuck pig any suggestions


put a fuel pressure guage on it and turn the key to on, the pressure should build and hold if not you may have a leaking injector or injector seal

Nov 20, 2010 | 1994 GMC Jimmy

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My 94 gmc jimmy wasn't starting up, I thought it was the battery so I jump started it, when it finnaly started up it was idoling rough and oil was coming out of the muffler. I was told it just might need a...


Jimmys of this year had a bad problem with the fuel spider on vortec fuel injector hoses underneath the plenum. check your oil level to make sure that fuel isnt draining into oil sump and over filling it. this condition is very dangerous. 1 it can blow the top out of a piston or 2 catch on fire. that is where I would look first.

Sep 01, 2010 | 1994 GMC Jimmy

2 Answers

In a 92 GMC Jimmy, Where is the Fuel Pressure regulator?


If this is the 4.3 liter the fuel pressure regulator is located in the intake valley. You will need to remove the upper half of the intake manifold, once removed you will see a small round regulator located at on end of the injector line.

Aug 09, 2010 | 1992 GMC Jimmy

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Will crank and idle for about a minute then cuts off. 92 gmc jimmy 4,3 vortec, replaced fuel pump and filter


bad fuel injectors! i replaced the pump and flue filter and did same thing idle for minute then kill.

Feb 23, 2010 | 1992 GMC Jimmy

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What is a Vortec engine?


The "spider" injector is the problem. You're right that one of the injectors is stuck open, unfortunately it has to be replaced as an assembly. This a common problem on the Vortec V-6's. When you were checking the fuel pressure, the fuel was passing through the open injector, giving you a low reading. After replacing the injector assembly, be sure to change your oil before you start the engine. I'd be willing to be you have a pint or two of gasoline that has gotten into the crankcase. That injector unit will cost you around $350. It's not too hard to put in, just be careful.

Feb 20, 2010 | 1994 GMC Jimmy

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My 1995 jimmy starts hard. I have to pump gas pedel 5 or 6 times while turning it over?


it's a 95 with probably over 100,000 miles with a vortec engine. i would change the fuel filter,plugs and wires (simple tune-up) and every fill up i would put a bottle of fuel injector cleaner in the tank or take it to a firestone or other shop that can do a fuel system cleaning and injector cleanig

Jan 14, 2010 | 1995 GMC Jimmy

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My 1996 Gmc K2500 with a 7.4l is miss firing. runs good till it warms up, then the problem starts. I have no codes in the computer. new fuel filter, spark plugs, air filter


Very good chance that it's bad fuel injectors and/or fuel pressure regulator. Very common with the 96-2000 L29 motor (Vortec 7.4L)
Replace with better injectors, the OEM ones are NOT WORTH cleaning. Go to http://www.fullsizechevy.com/forums/general-discussion/technical-maintenance/213662-96-99-454-vortec-owners.html
for more info...

Sep 05, 2009 | 1996 GMC Jimmy

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94 gmc jimmy will not start


You have to determine a few things. Are you getting spark at the plugs? Are you getting fuel to the injectors? You can also read the engine codes to see what codes are stored in there.

Jul 04, 2009 | 1994 GMC Jimmy

2 Answers

Hard start when cold/first start in morning


The pressure relief valve is in the spider fuel injector not the fuel pump. We have had our 94 gmc jimmy for 4 years & have had to replace the fuel injector 4 times which cost right at $500 each time for the part. Yes the spider fuel injector cost averages around $500.

Nov 16, 2008 | 1994 GMC Jimmy

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