Question about 1995 Ford Escort

2 Answers

Well after replacing the idle air control valve and clearing the trouble code, my Escort has developed a check engine light again and gives me the exact same code again. The vehicle began stumbling off idle and seems worse off than before. Any ideas as to where to go from here? Need vehicle to smog, passes everything but the inspection due to the light.

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  • sbclick09 Feb 10, 2010

    The EGR valve passed the function test at the smog shop. Don't know if that means it is working efficiently but it is functional. How do I go about testing it more in depth? How does that interfere with the IAC valve code the computer tells me it has?

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  • Master
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Hi

It sounds like an air fault, check all your air pipes for any leaks or rips etc. And also the air mass sensor, if the air mass sensor is faulty then it will not run properly, A lot of the time you can just clean them up with some carburettor cleaner and re-fit them. this normally sorts the issue, although at times they will need to be replaced, cost new is about £30 even cheaper if you get one off ebay.

The other thing it could be which would also trigger the engine light and loss of power is the EGR valve, " Exhaust Gas Recycler Valve" this forces any unburned fuel back through the engine to reduce the emissions, if these are faulty you can also clean these with carb cleaner before replacing, does not always work but it's worth a go.

As it is stumbling from idle I would check the air flow sensor, this is located on the air box and is very easy to remove and clean, it is also very common on fords.

If you need specific information please get back to me for assistance.
Try the above mentioned, if the light go's off then you know what the issue is.

Regards
Dan

Posted on Feb 10, 2010

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  • Ford Master
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The computer is blaming the idle air control valve,so,I would look at the e g r valve,make sure it is closing all the way,not staying open.Check all vacuums also,to make sure you have no leaks.

Posted on Feb 06, 2010

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3 Answers

How to fix a dtc p0507?


A vacuum leak Leaking air intake after the throttle body EGR valve leaking vacuum A faulty positive crankcase ventilation (PCV) valve Damaged/failed/dirty throttle body Failed EVAP system Failed IAC (idle air controller) or faulty IAC circuit

Sep 28, 2015 | 2005 Nissan Altima

2 Answers

97 malibu with a 3100 engine - it dies if you let off the gas - so it won't idle - but runs fine as long as you are giving it gas


idle air control motor is most likely not working . sometimes you can clean them out with intake cleaner spray or you may need to replace it . also look for vacuum leaks . another possible problem is a egr valve stuck open .i would think the engine light would have come on if that was the case for the egr valve

Nov 05, 2013 | 1997 Chevrolet Malibu

1 Answer

94 nissan altima won't start and iddle after cleaning IACV valve


An IAC (idle air control) motor is designed to adjust the engine idle RPM speed by opening and closing an air bypass passage inside the throttle body. The cars computer or PCM (powertrain control module) receives information from various sensors and will output signals to adjust the idle air control motor in or out to adjust engine idle speed by controlling engine idle air. An idle air control motor can fail one of two ways, either the motor short circuits and stops working or the motor will develop high resistance and cause the idle air control motor to react slowly, either failure can cause the engine to stall at idle. When a trouble code scan is performed it sometimes won't always detect a failed or weak idle air control motor.

Oct 08, 2012 | Nissan Altima Cars & Trucks

1 Answer

P507 buick regal 1998


P0507 - Idle Air Control (IAC) System RPM Higher Than Expected

This P0507 code is one that's sometimes triggered on vehicles that have electronic throttle control. That is, they don't have a regular throttle cable from the accelerator pedal to the engine. They rely on sensors and electronics to control the throttle. In this case, the P0507 DTC (diagnostic trouble code) is triggered when the PCM (powertrain control module) detects an engine idle speed that is greater than the desired (pre-programmed) RPM. In the case of GM vehicles (and possibly others) if the idle speed is over 200 rpm higher than expected, this code will be set.

Potential Symptoms: Most likely you'll notice the idle speed is higher than normal. There are potentially other symptoms as well. Of course, when trouble codes are set, the MIL (malfunction indicator lamp, a.k.a. the check engine light) illuminates.

Causes: A P0507 DTC trouble code may be caused by one or more of the following:
* A vacuum leak
* Leaking air intake after the throttle body
* EGR valve leaking vacuum
* A faulty positive crankcase ventilation (PCV) valve
* Damaged/failed/dirty throttle body
* Failed EVAP system
* Failed IAC (idle air controller) or faulty IAC circuit

Possible Solutions: This DTC is more of an informational code, so if there are any other codes set, diagnose them first. If there are no other codes, inspect the intake air system for air or vacuum leaks and damage. If there are no symptoms other than the DTC itself, just clear the code and see whether it returns.

If you have an advanced scan tool that can interact with the car, command the idle higher and lower to see if the engine responds appropriately. Also check the PCV valve to see if it's blocked and needs to be replaced. Check the IAC (idle air controller) if equipped, verify it's operation. If available, try swapping in a new throttle body to see if that fixes the problem. On Nissan Altimas and possibly other vehicles the problem may be fixed by having the dealer perform an idle air relearn procedure, or other relearn procedures.


Hope this helps; keep us updated.

Feb 04, 2011 | 1998 Buick Regal

2 Answers

98 ford escort check engine light is on the code comes up p1506 how do i fix


This code refers to the Idle Air Control Overspeed Error, I would clean the IAC, and if cleaning does not work I would replace it. It is located directly on top of the throttle valve on the intake manifold. Hope this helps, let me know.

Aug 09, 2010 | 1998 Ford Escort

1 Answer

05 FOCUS P0-507 CODE


P0507 - Idle Air Control (IAC) System RPM Higher Than Expected

This P0507 code is one that's sometimes triggered on vehicles that have electronic throttle control. That is, they don't have a regular throttle cable from the accelerator pedal to the engine. They rely on sensors and electronics to control the throttle. In this case, the P0507 DTC (diagnostic trouble code) is triggered when the PCM (powertrain control module) detects an engine idle speed that is greater than the desired (pre-programmed) RPM. In the case of GM vehicles (and possibly others) if the idle speed is over 200 rpm higher than expected, this code will be set.

Potential Symptoms: Most likely you'll notice the idle speed is higher than normal. There are potentially other symptoms as well. Of course, when trouble codes are set, the MIL (malfunction indicator lamp, a.k.a. the check engine light) illuminates.

Causes: A P0507 DTC trouble code may be caused by one or more of the following:
* A vacuum leak
* Leaking air intake after the throttle body
* EGR valve leaking vacuum
* A faulty positive crankcase ventilation (PCV) valve
* Damaged/failed/dirty throttle body
* Failed EVAP system
* Failed IAC (idle air controller) or faulty IAC circuit

Possible Solutions: This DTC is more of an informational code, so if there are any other codes set, diagnose them first. If there are no other codes, inspect the intake air system for air or vacuum leaks and damage. If there are no symptoms other than the DTC itself, just clear the code and see whether it returns.

If you have an advanced scan tool that can interact with the car, command the idle higher and lower to see if the engine responds appropriately. Also check the PCV valve to see if it's blocked and needs to be replaced. Check the IAC (idle air controller) if equipped, verify it's operation. If available, try swapping in a new throttle body to see if that fixes the problem. On Nissan Altimas and possibly other vehicles the problem may be fixed by having the dealer perform an idle air relearn procedure, or other relearn procedures.

Hope helps (remember comment and rated this).

Aug 05, 2010 | 2004 Ford Focus

1 Answer

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.

Feb 18, 2010 | 1995 Ford Escort

1 Answer

Won't start while hot, wait an hour fires right up and runs / idles /drives smooth


FORD: 1995-96 CONTOUR, CROWN VICTORIA, ESCORT, TAURUS, THUNDERBIRD
1996 MUSTANG LINCOLN-MERCURY: 1995-96 CONTINENTAL, COUGAR, GRAND MARQUIS, MARK VIII, MYSTIQUE, SABLE, TOWN CAR, TRACER LIGHT TRUCK: 1995-96 AEROSTAR, BRONCO, ECONOLINE, F-150-350 SERIES, RANGER, WINDSTAR
1996 EXPLORER This TSB article is being republished in its entirety to include the 1995 4.6L Thunderbird/Cougar. ISSUE: After a 1-4 hour engine soak time, long crank times and/or long crank to start followed by a stall may occur on some vehicles. No further stalling or rough idle will occur after the engine is running. The long crank and/or stall may be due to the Idle Air Control (IAC) Valve sticking.
ACTION: Replace the IAC Valve with a revised IAC Valve if no Diagnostic Trouble Codes (DTCs) are present. Refer to the following Service Procedure for details.
SERVICE PROCEDURE
  1. Perform normal diagnostics and correct any DTCs as required by referring to the appropriate year Powertrain Control/Emissions Diagnosis (PC/ED) Service Manual.
  2. If no codes are present, replace the IAC Valve by referring to the appropriate model/year Service Manual, Section 03-14. Refer to the following Idle Air Control Valve Application Chart for proper IAC usage.

    IDLE AIR CONTROL VALVE APPLICATION CHART Model Year Vehicle Engine Revised Part Number PASSENGER CARS 1995 Escort/Tracer 1.9L F5DZ-9F715-BA 1996 Escort/Tracer 1.9L F6CZ-9F715-BB 1995 Contour/Mystique 2.5L F5RZ-9F715-AB 1996 Contour/Mystique 2.5L F6RZ-9F715-AA 1996 Taurus/Sable 3.0L 4-Valve F5DZ-9F715-DA 1995 Taurus/Sable 3.0L 2-Valve F5DZ-9F715-EA 1996 Taurus/Sable 3.0L 2-Valve F6DZ-9F715-DA 1995 Taurus SHO 3.2L F6DZ-9F715-CA 1996 Taurus SHO 3.4L F6LZ-9F715-AC 1995 Taurus/Sable 3.8L F68Z-9F715-EA 1995 Crown Victoria/Grand Marquis/Town Car 4.6L 2-Valve F5PZ-9F715-AA 1996 Crown Victoria/Grand Marquis/Town Car/Mustang 4.6L 2-Valve F6AZ-9F715-EB 1996 Mustang 4.6L 4-Valve F65Z-9F715-BC 1995-96 Continental 4.6L 4-Valve F5OZ-9F715-AB 1995 Mark VIII 4.6L 4-Valve F3LZ-9F715-AA 1996 Mark VIII 4.6L 4-Valve F6LZ-9F715-AC 1995 Thunderbird/Cougar 4.6L 2-Valve F5PZ-9F715-AA 1996 Thunderbird/Cougar 4.6L 2-Valve F6AZ-9F715-EB LIGHT TRUCKS 1995-96 Ranger 2.3L F5OZ-9F715-AB 1995-96 Ranger 3.0L F67Z-9F715-AA 1995 Aerostar 3.0L F68Z-9F715-DA 1996 Aerostar 3.0L F69Z-9F715-AA 1995-96 Windstar 3.0L F68Z-9F715-DA 1995 Windstar 3.8L F68Z-9F715-EA 1996 Windstar 3.8L F68Z-9F715-CB 1995-96 Econoline/F-150-350 Series/Bronco 4.9L F68Z-9F715-EA 1996 Explorer 5.0L F67Z-9F715-BA

Nov 03, 2009 | 1996 Ford Explorer

2 Answers

1999 Ford Escort idle problems


PVC valve is not metering air correctly, it will appear ok shaking it but looses it ability to maintain proper position causing a medium to gross vacuum leak.

Sep 12, 2008 | 1998 Ford Escort

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