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No start 99 gmc yukon!!!!!
Have a 99 5.7 gmc Yukon... Was running fine, shut it off then the next morning tried starting it up and nothing. Turns/cranks wants to start but nothing, checked it for codes and have none. The fuel pump, plug wires, distributor, cap and rotor were replaced maybe 6 months ago. Holds fuel pressure( key on jumps to 60 psi then drops to 55psi when the relay clicks on and stays there), the pump and relay come on, have spark at all plug wires.
Thought the timing chain had jump but everything is at tdc. I swapped out the spark plugs, starter, crank sensor, battery and did a compression test this morning with cold engine(since it will not start) and here are the numbers
#1 150 #2 150
#3 170 #4 110
#5 85. #6 90
#7 150 #8 75
Would these low of numbers cause it not to start?
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