My truck starts for about a sec. Then shuts off

Asked by Mar 26, 2016 at 09:43 PM about the GMC Sierra 2500HD

Question type: Maintenance & Repair

My truck cranks then shuts off just replaced fuel
filter and pump. Ran fine for about 3 days now it's
doing the same thing it did before I replaced it.  
Help!!!

5 Answers

82,025

May be a leaky spider assembly, (injectors, spider lines, fuel regulator) Can check by doing a fuel bleed down test.

No leaks, plenty of fire , I think new fuel pump is bad it got wet. Maybe

Little fuel from shrader valve

82,025

Not necessary to tare into taking the gas tank down just yet, get a fuel pressure gauge and you may save yourself a lot of headache. Fuel pressure should be 56 to 63 lbs. That checks the fuel pump. Turn the key off and watch the gauge. Should not drop more than 5 lbs. in 3 minutes. You have a fuel issue since you say you have plenty of spark .

82,025

And the fuel pump is submerged in gas any way, they did that so it would run cool.

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