Compression Test

[TrisK]

My mate has had white smoke and stuttering

So got him to do a compression test

He got (in bar)

1: 9.7

2: 8.6

3: 7.8

4: 8.2

What do you guy make of that? Basically after a ragging till smoke white and thick after stopping for 30 seconds then clear and be fine

He also claims its flat boosting although his guage is showing a solid 1 bar

What do you guys think?

Results seem a bit all over the place

[AdamB]

Probably headgasket mate, they are all over the place. Did he do a wet test? Dropping oil down the bores to eliminate the rings.

[Flaminsam]

As a rule of thumb I always go for if there's a difference of over 1 bar across all four cylinders there must be something wrong. Do you have access to a bore scope? That would give a better indication of the problem.

[corofin12345]

cylinder one seems fine, other 3 seem to have problems... if he didnt do it the way below tell him to do it again just to make sure..

warm engine

remove king lead "removes spark"

remove EFI fuse "removes fuel"

WOT "wide open throttle while cranking for comp reading"

Edited July 9, 2012 by corofin12345