Did A Compression Test

[JET]

The most common is to turn the car over 7 times when doing a compression test. Pull the MPI fuse and all the plug wires before hand. Your fuel injectors also will not make a difference, they are outside of the combustion chamber.

[Enes]

I heard its 4 times not 7 times?

-E

[1ViciousGSX]

Between 5 & 10 is a good number as long you do the same number of revolutions per cylinder. I like 5 times each.

[Raptor]

We always go 7. Like Mike said, between 5-10 is fine, but it is worth it to choose a number and stick to it for repeatability and comparison sake. I may start hitting the engine with the IR temp gun to try and keep testing at the same general temp also for the same reason. It is always good to develop a good solid method and stick by it whenever possible.

[timwakefieldjr]

I am more concerned about the spread from 190-150 (difference of 40) I know that the spec book states that the range between cylander should not be um um (ok i forgot the number off hand) but you get the idea. Obviously we are seeing a HIGH number on two cylinders. I would recommend running the test with a diffrenent test as other people have said (i have one if you need to borrow it let me know) make sure you are getting the tester sealed tight and run it the 5-10 times. (dont forget to unplug the injectors and also to take out the mpi fuse it would be a huge mess)

Good luck dont forget WOT

Let me know if you have any other questions

-Tim

[Raptor]

Thanks Tim, didn't we have all this covered around a month ago? Did you add something we didn't cover and I am just not seeing it? If you are really bored you can go back a few more months and answer several other questions that have already been covered as well. :rolleyes:

[PSI2HI]

It still runs and thats good enough.

Check your lifters they are usually a good cause of low compression, had those be a problem many times. Second is usually leaky valves.

Leave the compression tester in your toolbox until the car starts to run shitty. All that compression testeris gonna do for you is make you worry about your motor.

Nick

[Enes]

he just had the head rebuilt.

-E

[Raptor]

Again, this thread was done a month ago ;) The head gasket is being replaced next week.

[timwakefieldjr]

Well if you fix the problem maybe you should say so that way people dont keep trying to help. And it always helps to chew ppl out makes them feel like adding their input.

-Tim