[Instagraham01]

I just did a compression test on the rear cylinders, they all read 200 psi, and the front read 240 psi. What could be causing that difference and what is the compression suppose to be at?

 

[pcfreak4]

I just did a compression test on the rear cylinders, they all read 200 psi, and the front read 240 psi. What could be causing that difference and what is the compression suppose to be at?

That sounds really high are you sure?

 

[Instagraham01]

That sounds really high are you sure?

Yes, we went around 2 times just to verify

 

[Sabertooth^2]

Rumor is the rear wears more due to the added heat. I know it's that way with the coilpacks, spark plugs, and injectors.

 

[fcabagnot]

I just did a compression test on the rear cylinders, they all read 200 psi, and the front read 240 psi. What could be causing that difference and what is the compression suppose to be at?

Hey bro, how did you go about doing the compression test? Obviously you had to remove the intake manifold?

 

[Sabertooth^2]

Hey bro, how did you go about doing the compression test? Obviously you had to remove the intake manifold?

WITH THE CAR HOT:

Intake manifold off, remove all your coil packs (will need to be off when checking those cylinders anyway), unplug your crank position sensor (won't fire fuel or spark), pull the spark plug for the cylinder you're checking, put in your compression tester, crank the engine a few seconds


Cold compression testing numbers aren't of much value unless you're chasing a bad cylinder, as nothing will be sealed