I did a compression test on my engine, just wanted to see how these numbers looked to you guys, the car just doesnt seem like it used to, maybe i am just used to it.

car is a 97 gt with 140k miles

If looking at the engine from the front of the car these numbers are from left to right

215 196 201 210

This was dry compression after the engine was warm.

from what i can tell this seems ok, but then i also heard two lower numbers next to each other wasnt good.
the plug all the way on the right is one i had to put a sleeve in because the engine shot it out and stripped the threads, but the compression seems ok on that one.

i did notice there are ngk plugs in there, and i think ive seen on here the celica prefers denso, so im going to go get some new plugs and see how they do.

also, the plugs were slightly white.

I feel like i know just enough to be dangerous with my car at this point. i appreciate any help or information you guys can offer me.

Thanks

Edit: Also wanted to mention i did this test because it smokes on start up and heavy acceleration after its warm. on start up it doesnt smoke long. and on heavy acceleration it only lasts about 2 seconds and only happens once until the engine has cooled again, is this normal? i dont want to make it worse.

This post has been edited by Stu37363: Feb 9, 2011 - 9:49 PM

the smoke is from the valve guide seals being old. there is nothing wrong with NGK plugs, i use them in all my cars. as for the compression numbers. the numbers are good, the change between 1 and 2 is a little higher than wanted, but i dont think it will hurt. as for the plugs being white, that means you are running a little lean

all my toyota's seem to love ngk plugs, never had a problem with them

Denso just does OEM electronics for Toyota. Denso are good, but NGK are good too.

Maybe someone had overtightened plug 4? It's just finger tight and then one little squeeze shut with the spark plug wrench.

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is it possible new valve guide seals would restore compression to number two? this plug usually has a little oil around the boot as well. i would have to take it to a shop for this since i dont know how to do it. im guessing this wouldnt be cheap, so may not be worth the trouble

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the compression #s are fine.
actually, a little on the high side (from carbon build up)

doing valve seals wont help raise compression.

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Thanks for dealing with my ignorance guys, i appreciate the information. Is the carbon buildup something i could clean out with seafoam or some type of cleaner?