Question about 1999 GMC Yukon

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1997 yukon ran good one day. shut it off and would not crank, just turned over, seamed like it was trying to start but did not. changed feul pump, spark plugs and put in a new battery and still does the same thing. what else could be wrong?

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  • GMC Master
  • 21,873 Answers

Did you check for spark, and the actual fuel pressure ?

Posted on Feb 09, 2014

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6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

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SOURCE: 1997 GMC K1500 4x4 5.7 ex.cab SFI injection system

Did you check the fuel filter?
or possably the catalitic converter is cloged, check the exhaust pressure.

Posted on May 27, 2008

Mike258
  • 1498 Answers

SOURCE: 1997 GMC K1500 4x4 5.7 ex.cab SFI injection system

Hey there boatright33,

A few things things immediately come to mind.

There may be a problem with the engine controller. You could check the ODBII onboard diagnostics. Auto part stores will usually do this for you at no cost.

When you pulled the ones that were/went bad, how did the filters look? Could there be particulate matter still in the tank causing them to fail.

I always put this one off until last. Check the injectors. Are they gummed up?

Let me know what you find out
Mike


Posted on Aug 12, 2008

  • 1 Answer

SOURCE: Engine died while driving, cranks but won't start.

not all scanners a created equal. You need to check for trouble codes...............but it must be fixec by now.

Posted on Feb 08, 2009

Molson02536
  • 3854 Answers

SOURCE: 2001 GMC Safari. Changed spark plugs, rotor cap

Try changing the fuel filter and checking the fuel pressure at the shredder valve. The readings should be 60 to 65psi with the fuel line pressurized with the engine not running, once the engine is running. It should drop by 5psi. Start with the simple things first. Keep me posted, be glad to help.

Posted on Jun 28, 2009

  • 1 Answer

SOURCE: 97 gmc pickup, 5.7 eng, fuel pump not operating,

What you need to do is check you fuel pressure. Go to a local auto parts store and buy a fuel injection pressure tester. The pressure fitting is on the top of the motor its a 3/8 ish sized metal line and has a screw on fitting like a tire valve does. This line comes up from the back of the motor to the right of the distributor and goes down into the intake. Make sure to have a rag handy to catch the fuel seepage. After you connect the pressure tester turn the key on and off three times and read the gage you should have atleast 58 pounds of pressure. If you have 56 pounds it won't run because the fuel injectors are a poppit valve style and need atleast 58 pounds of pressure to operate.

Posted on Sep 12, 2009

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