compression test

[fernando cunha]

was wondering if its ok to do compression test on 4 cylinder turbo engine
without the intake manifold and distributor ?
will i get the right psi.
thanks

Topic

[Joseph C]

[quote=”fernando_cunha” post=162572]was wondering if its ok to do compression test on 4 cylinder turbo engine
without the intake manifold and distributor ?
will i get the right psi.
thanks[/quote]
Yes. That’s how you are supposed to do a compression test, though you don’t have to remove the intake manifold.

Disable spark (disconecr distributor)
Disable fuel (so its not going into the cylinder while cranking)
HOLD THE GAS PEDAL TO THE FLOOR WHILE THE ENGINE IS TURNING they call this “WOT” or “Wide Open Throttle” THIS PART IS WHY YOU DONT NEED TO REMOVE INTAKE MANIFOLD
Turn engine about 5-7 times.

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[fernando cunha]

Removed intake and injectors for cleaning .
Injectors were clogged fuel leaking from O-Rings.
After I removed it I did compression test and
It was a shocker 85 psi first cylinder the rest 95 psi
So I got a bit confused maybe should have left intake on.
Anyway thank you

[Author]

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