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Old 07-02-2008, 01:59 PM
4.2trimble 4.2trimble is offline
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Join Date: Dec 2007
Location: Tampa, FL
Vehicle: 1999 Ford F150
Posts: 2,889
Quote:
Originally Posted by tj03f150 View Post
a vacuum leak/hole in the intake will usually cause you to run lean.

if unmetered air is making its way into the intake it'll be lean.

as far as being too rich thats a possibility but rich usually isnt caused by a vacuum leak (that i know of)

hopefullly he can get a scanner and tell us what it reports.
gotcha so since there more air getting let in will cause the lean condition?

so waht can cause a rich condition? for future reference?
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