Need Help.... 2004 GMC Sierra 1500 cranks and has spark but won't start - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 05-05-2016, 05:54 PM   #1
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Default Need Help.... 2004 GMC Sierra 1500 cranks and has spark but won't start

I was driving down the road at about 45mph when my truck shut off and would only crank but not start, I've check for fuel going to and past the fuel filter, changed the ignition control module, oil pressure sensor, distributor cap and rotor. The engine has spark and will back fire once and a while while cranking also I've changed the battery just as a precaution. Is there something I'm missing
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Old 05-05-2016, 07:51 PM   #2
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Verify your fuel pressure with a fuel pressure gauge. Your pump may be working to a point to flow fuel, but not enough to provide the 50+ psi to make the injectors work.
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Old 05-05-2016, 08:47 PM   #3
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Verify your fuel pressure with a fuel pressure gauge. Your pump may be working to a point to flow fuel, but not enough to provide the 50+ psi to make the injectors work.
Okay thank I will get a Gauge and test that
Do you think it can be a timing issue
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Old 05-06-2016, 05:53 AM   #4
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Anything is possible right now. If you can, get it scanned for any codes.
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Old 05-06-2016, 09:46 AM   #5
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Anything is possible right now. If you can, get it scanned for any codes.
Will a code show even though I put a new battery in?
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Old 05-06-2016, 05:05 PM   #6
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Most likely. But don't get your hopes up. If the pump isn't providing enough fuel pressure, you might end up with a misfire code. But you have to remember the basics for an engine to run.
1. Air
2. Fuel
3. Spark.

Without those three things, an engine won't run.
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Old 05-06-2016, 06:12 PM   #7
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Quote:
Originally Posted by Mike View Post
Most likely. But don't get your hopes up. If the pump isn't providing enough fuel pressure, you might end up with a misfire code. But you have to remember the basics for an engine to run.
1. Air
2. Fuel
3. Spark.

Without those three things, an engine won't run.
And #4 compression and unfortunately in modern vehicles #5 working computers and electronics that control the first 3, but what the heck to I know I'm an old fart from the breaker point days.

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1971 Chevelle SS
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