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Old 05-23-2011, 05:06 AM
Lowell Lowell is offline
Learning to use the forums
Join Date: Mar 2011
Posts: 14
Default Idle problem

1 min. it sounds like it has a racing cam 500rpm the next time it high idle around 2200 rpm
I changed the air idle control valve and still have the problem
what next?
1990 2.3L 4x4 XLT 5 speed
with a 96 motor
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Old 05-23-2011, 07:52 AM
mickblock mickblock is offline
Get off my lawn
Join Date: Apr 2010
Posts: 1,059
Default Re: Idle problem

Check the upper intake for vacuum leaks.
Do a fuel pressure test to see if pressure is dropping off. Connect it inline if you don't have a schrader valve.
Do a compression test to eliminate head gasket or worn camshaft.
08 4.0 Sport 4x4
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