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  Soarer Central * Test Post and Forum Issues * Uzz31 fast idle cycling between 1&2000 rpm Previous Previous    Next Next  

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Bruce Gillam
Tinkerer
New South Wales
LC400

Posts: 29
Reg: 11-2015

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Saturday, March 03, 2018 - 08:50 pm, by:  Bruce Gillam (Fiik) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Recently purchased the car knowing that it was low compression on number 7. The first diagnosis was a cracked piston. Started to get the left head off with the motor in place. Got the with the corner against the firewall so I pulled the engine out. Piston good, head gasket good,rings good. Finally found a pimple of metal on the exhaust valve seat.
Bruce Gillam
Tinkerer
New South Wales
LC400

Posts: 30
Reg: 11-2015

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Votes: 0 (Vote!)

Saturday, March 03, 2018 - 08:58 pm, by:  Bruce Gillam (Fiik) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Working on a phone here and pushed the wrong button. Anyway the motor is back together and running. As I stated the motor revs up to 2000 for a couple of seconds and then drops back down to 1000 rpm.
Could I have missed a connection or will I have to pull off the intake manifold to seal vacuum leaks?

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