Compression readings

[123-gtt]

Hi guys,I've been having running probs with the 5 since I got it last year,Afrs all over the place,lumpy running,lumpy tickover and so on,
Anyway that aside for the mo,as I've tried every sergestion thrown at me and none have worked so far,I've done a cylinder pressure test today(maybe I should have done this sooner)
But I've got readings,starting from the cylinder closest to water pump of
No 1 135
No 2 125
No 3 131
No 4 117!
What you think?:confused:
It not that far off really

[SirSamuelOfBuca]

cant really help but. mines lumpy like that as well, never run right. but comp test was ok. :S

temperamental cars!

[Matt Cole]

They all look low to me, but as a general rule should be 10% within each other. Looks like no.4 on its last legs.:eek:

Did you do the test dry with throttle open? If ss, blob a bit of oil down each cylinder (5ml) and re- test. If compression pics up then could be a ring issue.:crap:

[123-gtt]

They all look low to me, but as a general rule should be 10% within each other. Looks like no.4 on its last legs.:eek:

Did you do the test dry with throttle open? If ss, blob a bit of oil down each cylinder (5ml) and re- test. If compression pics up then could be a ring issue.:crap:

Did throttle open with warm engine mate,going to glug a bit of oil down now,still praying its a valve:cool:

[123-gtt]

Nope it's the rings, totally guttered:(
Went from 117 psi to 140

[TNT ANDY]

Nope it's the rings, totally guttered:(
Went from 117 psi to 140

WTF - that's great news. Easy fix is rings:)

[Matt Cole]

Nope it's the rings, totally guttered:(
Went from 117 psi to 140

:cry: