Ben ev
Member
Registered: 23rd Oct 05
Location: kingslynn / torquay
User status: Offline
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my car has a pritty major vac leak on a inlet mani that i mde for a c20let. its fixable but wonted to no if it would cause it to un lean s my widebandshows full lean on idle (22.4)
hoping to kill 2 birds with one stone but i always thought that a vc leak would cause it to run rich?
[Edited on 14-08-2008 by Ben ev]
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luke85
Member
Registered: 26th Nov 07
Location: Chesterfield
User status: Offline
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On a non turbo car or when the manifold is under vacuum then it will be sucking air in and like you see, it runs leaner.
But with a turbo car when its on boost it will run rich because instead of sucking air in, it will be blown out of the leak by the pressure in the manifold
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phil_sutton
Member
Registered: 8th Sep 07
Location: Nottingham
User status: Offline
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the fuel pressure is controlled by the inlet boost / vacuum as well
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Ben ev
Member
Registered: 23rd Oct 05
Location: kingslynn / torquay
User status: Offline
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cheers. cleared it up abit. ime going to weld around the plenuim, although it will be permanently fixed on there at least it shouldnt leak! if that fails ile have to go back to standed inlet i guess
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