Has anyone preformed a compression test on an Evo IX? If so what were the values in psi? Also, how much difference was there between the cylinders?

 

Everbodys #'s are different - 160- 190, due to the tester and the # of turns of the starter.

 

Oh No, my best number was 141 psi...........

 

More importantly, were the values consistent across cylinders?

 

Is there more than meets the eye here?

 

Did you unplaug your fuel pump fues
Did you run the chech on normal engine temps
Did you crank it enough 6 ~8 times
Did you take all the spark plugs out
Did you run the car until it dies after taking the fuel pump fues
and last what are your number on all pistons?

 

There was a 6psi difference between the best and the worst. Could the IX's be running a different compression ratio? BTW the engine was warmed up exactaly as the maintence manual says to do.

 

Did you unplaug your fuel pump fues- no
Did you run the chech on normal engine temps- yes
Did you crank it enough 6 ~8 times- yes
Did you take all the spark plugs out- yes
Did you run the car until it dies after taking the fuel pump fues- no
and last what are your number on all pistons? #1 135
#2 137 #3 140 #4 141
__________________

 

you are fine yor gauge is reading off and you need to cut the fuel...

Have fun

 

What do you mean?

 

^^ I was thinking that a problem had led you to do a comression test.

 

Well, for some odd reason the car is down about 30 horsepower from when I last had it dynoed. I put it on the dyno yesterday and I am like WTF is going on here. It was a little warmer that day, then the night I dynoed it last but I was worried it may have a compression problem, because we can't find any boost leaks.

 

YOUR FINE. your values are all very close.. you are fine

 

I hope so, I dont where those thirty horses went though........

 

was it the same dyno?