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Whistle!

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I seem to have a whistle on light throttle, which comes from the inlet manifold/throttle body "somewhere" on further investigation.

The revs seem to rise when I spray carb cleaner around the throttle spindle.

Anyone had this problem? Manifold pressure on the engine side of the throttle valve is 4bar at idle - bit low? I heard 0.5-0.55 was correct but not sure...[8|]

Thanks guys!
 
Hi Roddy,

it's possible that the rubber couplings between the plastic tubes bolted to the heads (the tubes with the injectors in them) and the intake runners have split. This would be the black plastic plenum on non vario cars and where the aluminium part of the manifold starts. Not common, but not uncommon if that makes sense. Examine each carefully, it might be your problem. Easy to change but not as cheap as you might hope.

Regards
GR
 
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