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Jim2 Jim2 is offline
7.0:1 > 11.3:1
Join Date: Oct 2003
Location: Calgary
Posts: 1,864
See if pinching off your brake booster hose changes the idle speed.

Remove inlet ducting or intercooler and place your hand over the throttlebody while the engine is running. If this drops the idle substantially then adjust the throttle stop set screw so the butterfly closes more, but not to the point of sticking shut.

Check that the large rubber union hose which seals the left and right intake manifolds does not have a cut or split.

My 3.2 throttle body had a forward facing brass hose nipple which was about 8mm dia. Make sure this got plugged.

As dewolf says, make sure there is a little slack in your throttle linkage.

Keep us posted.
Old 06-15-2007, 10:27 PM
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