Trouble starting
March 10th, 2024, 3:02 PM
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Trouble starting
My 99 2500 gmc starts first thing in morning but as the day goes on it has a trouble starting. If I pump the gas pedal a few times it start but struggles. What could be the reason/ cause for this?
March 11th, 2024, 10:24 PM
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Codes
Had o2 heater bank 2 sensor 1and sensor 2 changed those out and changed the fuel filter out and still does it.
Last edited by Chris staehler; March 11th, 2024 at 10:26 PM.
March 12th, 2024, 12:55 AM
#5
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Check the fuel pump pressure using a fuel injection pressure gauge, and also check the fuel pressure regulator - pull the vacuum line off the nipple and see if gasoline runs out of either the fuel pressure regulator or the vacuum line. If you get fuel spilling out then you need to replace the fuel pressure regulator.
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