Question about 1997 GMC Jimmy

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1997 , wont crank

I have 1997 gmc jimmy, It was running fine jsut stop in road.
cant not start it will turn over. it is geting gas and it is fireing.
fuel pump is making nose and pmping gas .
ITs is fireing throug all pugs. took all out and tryed to see if it was fireing. took timeing lighthook it p and it is in time , took nmber 1 pug out let piston come all way to top on number one.
it turn over good wont crank a bit. spryed eather still want crank.
Need help bad.!!!!!

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  • bulldogchief
    bulldogchief May 11, 2010

    I don't understand...you say it just stopped and now will not crank? What are you using to define crank? To me, when you say it doesn't crank that means when you turn the key you get nothing...just a click...but the motor does not turn over. If you were able to turn the engine over and verify firing and timing then it is cranking. Clarify what you see, ok, please?

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Fuel Pump is the most likely poblem.

Posted on Oct 15, 2011

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If starter will engage and engine can turn over quickly it should start.

however.. i dont know how you are verifying it has fuel as its a high-pressure FI system.

these systems by GM are VERY finicky and unless within spec precisely it will NOT run. i suspect fuel pump is putting out less than 57# which is min for these.

fuel pump known failure part. if replaced you MUST also replace wire harness at tank as they usually fail internally w/melted wires you cant see through wire sheath. low voltage will KILL the new pump.

also you didnt note engine size and family...

Posted on Sep 18, 2009

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Posted on Jan 02, 2017

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