Mechanics

CAN A HYDRAULIC ROLLER LIFTER RE-GAIN PRIME AND SLOWING LOSE PRIME WHILE ENGINE IS RUNNING & RE-GAIN PRIME AT RESTART?

2006 GMC Envoy • 108,000 miles

I have a miss in cylinder 1 and have changed the spark plugs, wires, coil pack, and even the intake gasket and still has a miss. There is a ticking noise coming from around the cylinder 1 area. This happened just all the sudden one day while driving the car and didnt seem gradual. I have checked all the fuel injectors and they all spray fuel equally. Since it has a ticking noise could that be a lifter losing prime and worn out? Could a lifter with no prime mess the lobe up on the cam?
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Gearhead90
July 24, 2012.



Yes to all. A lifter can collapse and pump up as well. If it is, I suggest replacing the lifter in question as it is causing an driveability issue.

Roy

ASEMaster6371
Jul 24, 2012.