70 compression across

[sTeCz|GsT]

ok so i randomly decide to to a compression test of my motor and came to the conclusion that starting from left to right cylinders the compression of each was 70 75 85 and 95. now i know thats kind of low how should i go about this problem??

 

[1993eclipseGS]

Kind of low? The service limit is 121psi. The standard compression is 164psi.

Did you also perform a leakdown test, To find out where your losing compression?

http://www.dsmgrrrl.com/FAQs/leakdown.htm

 

[98eclipseRS]

Did you do the compression test with a hot engine or a cold one. To get proper readings you really need to beat on the car for a bit before you come back and do the test. If you still have bad readings, pour a cap full of oil into each cylynder and try again. If you get better readings your rings aren't sealing properly. If you still have bad readings perform a leakdown test to see where you are loosing compresion.

 

[Dream On]

and be sure to hold down the gas pedal when cranking.

 

[larsenracing]

is the bat charged and cranking over fast enough.