Question about 1994 GMC Jimmy

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94 GMC Jimmy, Spider Assy. Problem or not?

I have a 1994 GMC jimmy with the 4.3 in it. It starts right up, but when i go to take off, it runs like a dog. I can floor it and only be going like 5mpg. It is NOT the converter, it is also guzzling gas real bad. could this be a problem with the spider assembly?

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It coul be a problem with the maf sesor.being dirty. Clean with CRCelectrical clesner . don't brush or rub, just no compressed air or touching. good luck, ned

Posted on Sep 27, 2009

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Posted on Jan 02, 2017

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94 gmc s-15 jimmy will not start and when does start runs for short time and dies


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i have a 1994 gmc jimmy 4.3l cpi. i could not pass the emission test.hard to start, spuddered, and smell of gas was strong. long story short, i replaced my spider injectors, good to go. $278 brand new from auto zone.

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1994 GMC S15/T15 Jimmy 4WD 4.3 liter V-6 VIN "W"

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Hope helps (remember to rate this answer).

Mar 21, 2011 | 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

1 Answer

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

1 Answer

94 jimmy will not run bad fuel pressure regulator?


Nothing wrong with the regulator. That is how it is supposed to work, it sounds normal.
I guess you will have to get to the spider to see what is wrong. Fuel delivery to the pot seems normal. Could be something to do with injector circuit, IDK. Sorry can't help more.

Mar 14, 2017 | 1998 GMC Jimmy

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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

2 Answers

1994 jimmy fuel shutown @spider?


Hi

A very common failure on these is the CPFI unit , or SPIDER as people like to call it.

There is one single injector which feeds each cylinder via a pipe and poppet. The injector becomes blocked and the engine won't start or run.

Before you go condemning this though, just make sure you have good fuel pressure because the fuel pressure regulator or fuel pump could also have a hand in the problem. Make sure the pump is running, and if not then check the fuse, the relay, and the pump itself.

Very best regards

Geordie

Jun 18, 2008 | 1991 GMC S-15 Jimmy

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