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700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
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740 brakes affecting idle?Views : 1956 Replies : 15Users Viewing This Thread : |
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Jun 22nd, 2010, 23:15 | #1 |
Senior Member
Last Online: Jun 2nd, 2013 22:00
Join Date: Jun 2010
Location: salford
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740 brakes affecting idle?
hello all,
I've noticed that when my car is cold it will idle up and down at 500 rpm and 'chug' once warmed up it will run perfect...however i've noticed if i pump the brake pedal quickly on idle that same chugging returns and i assume when brake vacuum rebuilds again, the idle smooths out once again.....should there be a non return valve on the vacuum pipe between the manifold and the master cylinder? |
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