Quote:
Originally Posted by XfireZ51
Well yes the PR vacuum line is by #7 but plenum volume is supplying vacuum so its hard for me to gather how it discriminates on #7.
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As I recall the Fuel Pressure Regulator last time I had one fail (someone else ZR-1) there was raw gas all the way forward coming out the Air Intake in front of Throttle Body which.........raw gas got there through the FPR vacuum line.
Quote:
Originally Posted by mike100
Poor man's leakdown test: What is the compression on one crank compared to other cylinders?
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Yes.....I would be more suspect of the uneven compression. Blue or Black smoke for example.....burning oil or gas??
You say gray/blackish exhaust??