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Ask Shawn Your Own Question
Shawn, Ford Senior Master Technician
Category: Ford
Satisfied Customers: 360
Experience:  20+ years Ford, Lincoln, Mercury experience, Senior Master Ford Tech, ASE Re-Certified Master Tech
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2000 explorer: sohc idle speed..idle air control..aftermarket made

Customer Question

I have a 2000 explorer 4x 4.0 SOHC idle speed high erratic idle air control valve changed 3 x still code p1506 can the parts all be bad? using aftermarket made in china parts
Submitted: 8 years ago.
Category: Ford
Expert:  Shawn replied 8 years ago.

I recommend using a factory ford part, I have had concerns of aftermarket parts setting dtc's before. Thanks for asking, Shawn from Alaska.


If I can be of further assistance to you, we can go back & forth on this thread.

Customer: replied 8 years ago.


What else will cause the erratic high idle?


Expert:  Shawn replied 8 years ago.

Possible sticking throttle plate, binding cable, vacuum leak.


When your vehicle acts up, try tapping on the idle air control valve that you replaced. If that does not help, try unplugging it. Let me know the results please.

Customer: replied 8 years ago.


I did tap on it no reaction I didn't unplug it. Another symptom seems to be an initial very high rpm when the engine starts. The original problem was very high idle most of the time. The 1st replacement part fixed the problem for a week - it ran like new - than erratic but never as bad as the 1st valve.

Expert:  Shawn replied 8 years ago.
When it has a very high idle, unplug the IAC & let me know the results.
Customer: replied 8 years ago.


I unplugged the valve, started it and it ran at a normal rpm after a minute I plugged it in and the idle jumped up, unplugged and it drops to normal.

Expert:  Shawn replied 8 years ago.

Sounds as if you may have multiple concerns.


Do you know if your intake gaskets have been replaced, they are terrible for causing a vacuum leak.


I would recommend using a Ford idle air control valve, as it may be your concern with setting the repeat dtc.

Customer: replied 8 years ago.


the gaskets have not been replaced is there a test to check them? can the original idle air controller be successfully cleaned

Expert:  Shawn replied 8 years ago.

I have cleaned them, but with a low success rate.


If your lower intake gaskets are still oem, they will leak at cooler temperatures, the materials have been revised to reduce shrinkage.

Customer: replied 8 years ago.


What should it cost to have them replaced?

Expert:  Shawn replied 8 years ago.

Labor is 2.7 hours & parts is under a $100


Customer: replied 8 years ago.


what was the proper response for the idle speed when the plug is pulled from the idle air valve while running?

Expert:  Shawn replied 8 years ago.
The engine should die
Shawn and 5 other Ford Specialists are ready to help you
Customer: replied 8 years ago.




Expert:  Shawn replied 8 years ago.
Your welcome! Have a Great Christmas, Thanks, XXXXX XXXXX Alaska!