did a compresion check what should it be at?

[Ryan441]

its at about 163psi. when i checked it with the old motor it was at 110-120psi. is this bad or good

 

[BobHyatt]

its at about 163psi. when i checked it with the old motor it was at 110-120psi. is this bad or good

What motor and what year?

Our 2000 runs around 190 cylinder to cylinder with maybe a 10psi range around that.

 

[98COBRA281]

mine was 190-200psi across all the cylinders

 

[BurningRubber]

How many miles are on the motor?

I checked mine with 125k or so, most cylinders were in the 150-160 range, one being 175 or so, and two were 120...

If they are consistant with eachother, then 163psi is fine.

 

[Mustang5L5]

its at about 163psi.

WHat were the other 7 cylinders?


It's not about a set number...but more about all 8 cylinders being within a certain percentage of each other. If you have 1 that is really off, it's something to worry about

 

[Ryan441]

idk i only checked the one bc i was checking the sparkplug to see if it was bad bc the motor is spitting at wot. its a 97 gt w/ fresh motor odometer is broken but its had about one tank of gas threw it.

 

[CobraRed_96_GT]

compression on one cylinder doesn't mean anything. As long as they are consistent then all you're looking at is wear

 

[Mustang5L5]

idk i only checked the one bc i was checking the sparkplug to see if it was bad bc the motor is spitting at wot. its a 97 gt w/ fresh motor odometer is broken but its had about one tank of gas threw it.

Then you didn't really do the check right.


You gotta check all 8