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lumpy tickover with servo fitted
Posted: Mon Sep 24, 2007 9:45 pm
by malminor
fitted a remote servo lockheed type, with drilled manifold new hoses etc, I have a lumpy and reluctant tickover, is it a matter of adjusting the tickover to suit the extra vacuum from the servo unit, there are no obvious leaks in the hoses manifold / gaskets they are all new.
According to the instructions it's fitted the right way around with the valve at the bottom, it bled up ok
the engine has been stood for a while during restoration, the only thing I did to the carb was clean out the float bowl. It starts fine.
Posted: Mon Sep 24, 2007 10:00 pm
by eastona
try disconnecting the servo and blocking the manifold. If its still lumpy, then its the engine itself. If it's OK, then it's the servo set up.
If it turns out to be the manifold, fit the pipe, block the end, check the engine runs OK, then add the servo, just gradually add bits to isolate the problem.
Good luck
Andrew
Posted: Mon Sep 24, 2007 10:02 pm
by eastona
BTW, can't you check for induction leaks with WD40 or carb cleaner?? spray around the joints and listen for increase in idle speed??
Posted: Mon Sep 24, 2007 10:15 pm
by bmcecosse
Servo should make no difference to the idle - unless it's leaking air. Advice from Andrew above is excellent.
Posted: Tue Sep 25, 2007 9:52 am
by RobThomas
Should be one-way valve just as the pipe goes into the servo. Often the plastic ones get fatigued and the valve brakes. If Girling, you can pull the valve out and do a 'suck-blow' on it to test it.
Posted: Tue Sep 25, 2007 10:26 am
by dunketh
You used to be able to hear mine leak on my old Fiesta - a distinctive hissing sound.
However, if it is the servo causing problems I'd expect you to also suffer a corresponding increase in brake effort.
Posted: Tue Sep 25, 2007 2:27 pm
by bmcecosse
The one-way valve is designed to hold a little vacuum reserve inside the servo - it won't have any effect on idling.
Posted: Wed Sep 26, 2007 9:32 pm
by malminor
thanks to eveyone for the advice, it all points to an air leak, I'll start with disconecting and seeing how it runs without, then working my way back.
I have been restoring this morris for my daughter for almost a year ( a lot longer than originally planned),
hopefully we are on the final stretch, I have asked many questions, the help and advice from eveyone who uses the message board has been great.
thanks again.