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I HAVE A 1991 LTD CROWN VICTORIA 5.0 LITER WITH EFI. HOW DO…

I HAVE A 1991...

I HAVE A 1991 LTD CROWN VICTORIA 5.0 LITER WITH EFI. HOW DO I ADJUST THE IAC? I NEED A LITTLE BIT BETTER IDLE.

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Answered in 3 minutes by:
10/7/2017
Jaybird61
Jaybird61, ASE Certified Master Technician
Category: Ford
Satisfied Customers: 2,317
Experience: Automotive Instructor at Palm Beach State College
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Hi, My name is Jay

The IAC does not have any adjustments. If you have a lower than normal idle then you may have another problem like sludge buildup in the IAC and throttle body plates. Have you tried to clean both of these using carburetor cleaner?

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Customer reply replied 10 months ago
No. The car only has 77k miles on it. It runs fine otherwise. On a cold start, I usually let it idle for 30 seconds or so, then drop it into reverse. It sometimes dies at that point. If I let it warm up for a few minutes, the idle improves and I can usually back out.

This year was very prone for carbon built up in the throttle body and idle control valve. If you have both of these cleansed it will improve both cold and hot idle.

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Customer reply replied 10 months ago
Ok. Thanks Jay.

You are welcome. Let me know if you have any other questions? If not then please accept and rate my answers 5 stars so I can get credit for helping you today. Thanks.

Jaybird61
Jaybird61, ASE Certified Master Technician
Category: Ford
Satisfied Customers: 2,317
Experience: Automotive Instructor at Palm Beach State College
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