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Can you have good compression on an engine with defective valves?
Wiki User
∙ 13y ago
no if the valves do not seat properly against the head the piston will force the fuel mixture past either into the exhaust or the intake if the vehicle is running rich i would suspect the intake valves
Wiki User
∙ 13y ago
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Why would number 2 and 3 plugs not be firing if you have good compression good fuel pressure new plugs wires cap and rotor and valves are not cracked or loose on a 1994 350 in a Chevy suburban?
You wouldn't have good compression if the valves were damaged or not seating. If they are not firing as in no spark at all, and the fact that these cylinders are on opposite sides of the engine I would say it has to be the cap. Inspect the inside and the outside of the cap very thoroughtly looking for any blackish lines to confirm this or take it back to the parts store and tell them it is defective is my reccomendation.
What is established through compression testing?
Compression testing is done on engines and it establishes whether the engine has good compression. Good compression is needed for the engine to start easily and run efficiently.
How much compression is good for a Briggs and Stratton 11hp vertical engine?
Leak down test : Uses 70lbs pressure to test for leaks around valves and cylinders.
What are typical compression test reading for a diesel engine in good condition?
typical compression test reading fora diesel engine
Why does a car engine click after you stop the motor?
engine click engines do the clicking noise because it has good compression its just youre valves returning to there original positions and the oil falling back in the oil pan. Probably the exhaust system cooling down.
Is unleaded fuel good for a cadillac 472 engine?
It is not good for the engine if it is the original setup from the 1970's. Lead is needed for lubrication to the valves. A reconditioned engine can use unleaded fuel if the intake and exhaust valves and the seats are replaced.
What is the compression on a 1989 yamaha 750 waverunner?
on any engine good compression would be anything over 100psi, though really good can be up to 150+ anything under 90psi and your engine will not run.
How much compression is good on a Briggs and stratton 26 hp over head valve twin engine?
Briggs doesn't publish engine compression specs, but 120 is good. 100 is okay. 80 is lousy.
What is a good compression on an old 2hp engine?
85-125 psi is acceptable.
What is needed to start 3800 series 2 engine?
A key? Compression/spark/fuel/good timing/good starter/ decent battery/correct wiring.
Would a defective fuel cap cause the check engine light to come?
Yes, a defective fuel cap will make the check engine light come on. It will alert the car that its not getting good gas mileage.
How can you tell a engine is bad on 2004 cts?
A compression test is a good place to start.
