High revs in park

1992 MERCURY MARQUIS
95,000 MILES • 4.6L • V8 • 2WD • AUTOMATIC
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TRACEY MCMORRAN
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  • 4 POSTS
Revs high when put in park.
Jan 3, 2019 at 9:02 AM
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ASEMASTER6371
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Good morning,

The fist thing I would do is check the idle air control valve. it has a habit of sticking and the idle runs high. try removing the wire connector and see if the idle drops down to normal.

https://www.2carpros.com/articles/engine-idles-too-high

REMOVAL

- Disconnect electrical connector from air bypass valve assembly.

- Remove the two bypass valve retaining bolts.

- Remove air bypass valve and gasket.

Roy
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Jan 3, 2019 at 9:23 AM
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TRACEY MCMORRAN
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  • 4 POSTS
it only high idle in park in drive it is okay. code check said EGR valve. thanks
Jan 3, 2019 at 11:30 AM
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ASEMASTER6371
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What is the code number? I doubt it is the EGR valve at all but if you get me the code number, I can look at the flow chart for the code.

Roy
Jan 3, 2019 at 11:34 AM