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Old 11-08-2009, 10:15 PM
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Tomguy Tomguy is offline
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Join Date: Aug 2002
Location: near Scranton, PA
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The 4.5's MAPs are different than the 3.5's - the 3.5 MAP is a slotted screw and the 4.5's is like that picture, with a hex head screw. The 4.5's gets stripped out internally if you much with it too much (ask me how I know). So if you can't locate said screw this may be why. Keep in mind yours may be covered with a black cap.

With your engine running, try to spray carb cleaner around your injectors and your manifold seals. If your engine slows/stalls, you need new seals and this is why you're running so rich with such low vacuum.
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