Have no clue what I'm doing
June 15th, 2019, 4:11 PM
#1
CF Beginner
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Have no clue what I'm doing
Have a 2001 GMC Sierra 1500 vortec 5.3 engine stalled wouldn't crank back up, now cranks occasionally runs for a bit , rough like misfiring, I am getting the p0405 code, egr is brand new. Any thoughts pls
June 15th, 2019, 8:51 PM
#2
CF Monarch
Short to ground in EGR signal or Reference circuits
Short to voltage in EGR ground or signal circuits
Bad EGR valve
Bad PCM wiring issues due to chafing or loose terminals
I'd look for any damaged wires. Might have fuel pressure checked and at the age always a good idea to clean the MAF too.
June 17th, 2019, 10:59 PM
#5
CF Monarch
Need to run a compression test on all of the cylinders. Might be a bad head gasket if your rig is loosing coolant.
Last edited by oilcanhenry; June 17th, 2019 at 11:01 PM.
