Quote:
Originally Posted by Frank Reiner
Both pumped (engine spin w/starter) compression, and leak-down tests are important.
A leaky hydraulic lash compensator (or two or three) will affect valve timing at idle but will not be evident with increased RPM.
After compression and ignition are confirmed "perfect", an investigation of the fuel system will then be in order.
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Usually a leaky lifter will make a tapping sound but not always. I’ll have to do the compression tests and report back.