My engine hits 300+ psi in all cylinders (12:1). In the Northeast weather has been very hot and humid (102F). I had my car out for an hour and it felt really sluggish has to be becaue of the weather. I did a compression test and I hit 300 (cylinder 4) 300 (cylinder 3) 290 (cylinder 2) 295 (cylinder 1) I did a compression test about 2 weeks ago and I was 300 across the board. Any opinions

 

i wouldnt worry about it

 

thanx sgt. I just like to stay on top of motor and make sure everything is ok. Do you think it could be cause of the weather?

 

i would think its possible but the numbers are still nice and high.

 

ill ckeck either tonight or tomorrow morning when the air is a bit cooler

 

i dont think thats big of a variance enough to be worried.

 

I just get a bit concerned, when 2 weeks ago it was 300 psi across the board. And today its 290 and 295 two cylinders. If the rings were to go, then that variance would have been much more? Sorry to ramble, I just wasnt expecting 2 cylinders to be low.

 

How are you doing the compression test?

 

From the Directions from C-speed

 

if the rings were to go, yes, expect a much more noticeable variance,

something like 300/300/180/300 <--- cyl 3 has a problem

if your self testing expect a little changing in the number.. nothing too serious as long as you know you are properly taking the readings.


[Modified by 00-0187, 5:56 PM 6/27/2002]

 

thanx man. My last motor went boom..trying to take care of this one.

 

I beleive that barometric pressure does have a hand in the results of a compression test.


Jason

 

im thinking that as well its hot and 100 percent humid making the temperature 102-105F