NO! You could run a compression test on an engine with NO intake manifold installed, so a leak of any size will not affect compression. The only things that usually affect compression is your rings, valves, and valve timing. if you have low compression on only one cyl, then valve timing is probably OK. With the piston at TDC removed the spark plug and introduce low pressure air (20psi) into the cylinder. If rings are bad, air will go into the crankcase (air comes out the oil cap), if air comes out the intake, you have an intake valve concern, if air goes out the tailpipe, you have a exhaust valve issue......Good Luck
A leaking spark plug wire can cause a backfire out of the intake, but the most common cause is a burned intake valve. A burnt intake valve will allow leakage during the compression stroke back through the intake causing a popping backfire out of the intake manifold.
Bad spark plug? Bad plug wire? COP (Coil on Plug?) Bad coil? Bad valve? Do a compression test Bad piston? Do a compression test All of the above to include a vacuum leak such as a bad intake manifold gasket.
Normal cause is the intake manifold itself.Normal cause is the intake manifold itself.
Bad are burnt intake or exhaust valve. Pistion rings broken, Burned pistion. Blown head gasket. That is all that would cause no compression are a loss of compression.
I would make sure power is getting to the fuel injector use a noid light to test it. You may also want to check the fuel pressure also the intake manifold may have a leak that can cause a misfire as well. Glad your compression is good. That is a sure sign its something simple.
If you have lost compression on several cylinders, and the car will not start, then its a cleaning problem and not a mechanical problem. The intake valves have got dirty and cannot seal very well, take off intake manifold and clean valves at the seat area. This should bring compression back. Usual cause is a commute of a mile or two, not allowing for complete engine warm up, lots of gook condensed in intake manifold. Richard
no it will not. Bad rings will do it, Valves not seating in the head, Bad head gasket. Burnt piston will do it . These are things to look for.
A bad intake manifold or manifold gasket can cause water to leak into the oil. Some newer cars have plastic manifolds and they will crack from age.
Intake manifold gaskets are leaking, intake manifold is warped.
Yes. Antifreeze is actually pumped through the intake manifold. If the gasket is bad it is possible that it leaks out
There are a few causes: Damaged or disconnected hoses (or component) from intake manifold. Worn out intake manifold gasket. Improper replacement of a part. Cracked or damaged intake manifold.
Spark plug, wire, coil, low compression, fuel injector, intake leak, etc.