Question about Ford Freestar
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Posted on Jan 02, 2017
SOURCE: HIGH IDLE, 1500rpm
No, its the intake manifold gasket. This is a very common problem with the SL/SL1 engine. There are only three bolts around the #1 cylinder and no bridge in the block between #1 and #2 cylinders. The flexible factory gasket tends to pull out in this area.
A confirmation of this is to spray some carburetor cleaner, fuel injector cleaner or even WD40 on the gasket around the #1 cylinder and if it affects the idle in any way, its because its leaking.
Felpro makes a good replacement gasket.
Posted on Nov 22, 2008
You may have to take it to a shop and have them connect their OBD tool to the computer and clear the deep memory. If you have a code left in the deep memory it can reapear like that. Good luck. Please rate me so I know how I'm doing. Thanks.
Posted on Dec 30, 2008
I'm assuming you have the 4.2l v6. If this is the case, there are two intake runners per cylinder, one long (torque) one short (horsepower), default setting for these would be long runners or closed.
There is a valve so to speak inside the intake manifold operated by a motor that switches to the short runners when the RPM"s reach a preset point. However there has been a problem with this design, not only with the 4.2's, but the 2.5's and 3.8's and every other motor that uses this design.
The motors go bad, or the valve gets carboned up and no longer moves. If you have a 4.2 start there, if not I'm not sure what is wrong.
Good luck and hope this helps
Posted on Apr 11, 2009
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