Compression Test Results
Senior Member
Joined: May 2002
Posts: 2,925
Likes: 0
From: Sacramelto, home after 10 years in Texas
That 175 is a problem. what it indicates is the combustion chamber is not sealing as effectively on the #3 piston. When it is out by a good amount, it can put an uneven load on the reciprocating parts, think about how your car would ride if one of the wheel balancing weights fell off. It might be rings or valves, does it smoke at all when you start it in the morning?
I
Joined: Jan 2001
Posts: 56,525
Likes: 0
From: Westside til I die
That 175 is a problem, there shouldn't be more than a 20 psi variance between any two cylinders.
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2015 Ford Mustang GT Fastback - Ingot Silver - 6M - Performance Package - Gibson Catback, JLT CAI, FR 47lb injectors, BAMA E85 tune, Eibach Sportline, BMR wheel hop kit, UPR oil separator, Steeda shifter bushing/bracket
Team B.O.B.® - Ballaz on a Budget