compression test, your experience/ opinon please :)
Turbo Mini Forums

with the dett i kept hitting at the pod is the head gasket fubar ?

its been playing on my mind since mitp, basically i am running dry deck so the usual symptoms dont apply, so i only have the CR test to go with
ive checked my cr hot an cold 3 times now, cyls 1/2+3 are within 1psi of each other, that i like but cyl 4 is 15psi down on that
now my engines in the past have been all over the shop regards the cr so i have no idea what to expect tbh
in your opinion is a 15psi drop alot? ie should i be thinking head gasket or not

it does have a small and regular stumble at idle and the afr flicks lean, it is regular enough to count the exhaust pulses its always on the 12th pulse witch points towards a single cylinder, but why not every fire?

cheers

Yes i moved to the darkside

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15 psi could be down to a different size chamber,

I'd say its worth swaping the plugs, if you have one that dosent fire ocasionally it can flick lean. also if the [plugs are a bit cold you can get this at idle, and the cylinder with the least compression will be most susceptable to not firing,