help 140-130-135-100 compression...

[Sbeing1]

I was changing the plugs on my new talon 95 and decided to do a compression test while i was at it. from passenger side over to driver side 140-130-135-100. Was there anything special i should have done b4 doing the check? the engine has been sitting for about 2 days since being driven and i did it on cold engine, could that change things? and what about these cam dialing or something, ive heard people doing that and there compression is better???? idk, im stock internally so that probably doesnt apply. if anyone can help itd be GREATLY appreciated. also, do you think these compression number could be whats making my accelration so damn slow? thanks alot guys

 

[Sbeing1]

oh, also my battery is pretty low on charge, its about to just run out, dunno if that effects anything. maybe it was higher charge on forst check (140) then worked its way down to 100 as power got lower on my battery....?? idk about this stuff, just my guess

 

[Quasimondo]

Warm the engine up and do the compression test again. You really can't get accurate numbers unless the engine is up to operating temperatures. If the numbers are still abnormal, have a leakdown test performed to determine if it's a bad valve, bad rings, or blown gasket.

 

[talonTSIDriver]

well, first give the battery a good charge and then redo the compression check. If it still gets around the same numbers, then thats not the problem and i would maybe look for white smoke at the tailpipe to see if its a headgasket. Do leakdown test, and even check for blue smoke which could be a sign of rings going out.

 

[Sbeing1]

ok looks like ill do the test again. also, i revved it and i think it was white smoke that came out idk, looked more white than blue.

 

[rowlex]

make sure you floor the car when cranking it over to do the compression test.

Try adding a capful of oil to the cylinders if you still get bad #'s. (this will seal any ring gap and will tell you if the problem is in the rings(if compression goes up a considerable amount --it was/is your rings being worn))

 

[Sbeing1]

what do you mean floor it? i thought all i had to do was turn it over and thats it, i should step on the gas too? hmm, ill try that, thanks

 

[rowlex]

Yes, compression tests are done with the gas pedal to the ground (throttle plate open) so that plenty of air can be sucked into the cylinder.

 

[JiggahMan]

make sure you floor the car when cranking it over to do the compression test.

Try adding a capful of oil to the cylinders if you still get bad #'s. (this will seal any ring gap and will tell you if the problem is in the rings(if compression goes up a considerable amount --it was/is your rings being worn))

Obviously the compression will go up, but ya know what? Our pistons have something called a dish, you must get the oil to the RINGS not in the dish for this to work.