Question about 1994 Ford Escort

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I recently replaced the idle speed control valve for my 94 ford escort and now it is idling high when i stop at red lights but when I put it into neutral or park it slows down whats the problem?

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EGR valve and PDFE sensor control idle speed. The idle speed valve you replace very rarely goes bad.

Posted on Jul 31, 2010

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94 st ford probe auto wont idle down when you stop at lights idles at 1500rpm takes about30 seconds to get to 500rpm ?


Could have vacuum leak , dirty throttle plate , idle air control problem . Would have to do some testing an inspecting to say what the fix would be. An don't adjust base idle screw , it will mess up the computer .

If unfamiliar with these thing's your best bet would be to take to a qualified repair shop . Ford IAC valve test how to adjust minimum idle speed Check out some more videos on testing idle control

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Have the fault code read as it may be a throttle position sensor or idle speed sensor that is at fault.

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first thing to do is check for vacuum leaks. grap a can of spray carb cleaner and spray hose connections and elbows while the engine is running. the idle speed will change when you hit a leak with the spray. also clean the IAC valve. Idle air control valve. This device controls the idle speed. then clean or replace the PCV valve. The EGR valve will cause problems like this if it is clogged with deposits.

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HAVE CAR SCANNED COULD BE FAULTY IDLE SPEED CONTROL.FAULTY EGR VALVE OR BAD FUEL INJECTOR.

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My escort is rpm over 3k when it starts and check engine light comes on. i get codes 116, 412, and 411..what can i do?


Code 116- Engine coolant temperature (ECT) sensor out of range, I would replace it.

Code 411- Idle speed system not controlling idle properly (too High)
Code 412- Idle speed system not cotrolling idle properly (too Low)

After replacing the ECT clear codes by disconnecting battery positive for at least ten seconds, see if codes 411, 412 return, if so clean or replace the Idle Air Control solenoid (IAC), repeat clearing of codes. Hope this helps, let me know.

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