Idleing problems

[JAR HEAD_56]

My 89 Eddie Bauer w/302 keeps falling out of idle once warm. It is evan worse when in gear. EGR was replaced along with plugs, rotor, cap,wires, fuel filter. There is no vacurm leak.....I am stumped. It also seems to be burning rich strong exhaust smell. will only Idel around 400- 800rpms. Help please....

 

[Seabronc]

Welcome to the Zone > . Fuel mixture, which is controlled by the computer, requires good input from the sensors to make the proper adjustments. The first one that comes to mind is the O2 sensor but it could be a number of things, have you tried pulling codes?

Good luck,

>-

 

[BroncoJoe19]

I agree with seabronc, that pulling codes is the next place to go.

You may consider cleaning your IAC too.

http://www.fordforumsonline.com/forum/engine-drivetrain/261-howto-check-clean-your-idle-air-control-valve-iac-iab.html

 

[JAR HEAD_56]

Thanks for the ideas I am going to pull the codes today. I am also going to reset my timming. I will let you know if it works. Thanks again....

 

[JAR HEAD_56]

I agree with seabronc, that pulling codes is the next place to go.

You may consider cleaning your IAC too.

http://www.fordforumsonline.com/forum/engine-drivetrain/261-howto-check-clean-your-idle-air-control-valve-iac-iab.html

Where is the IAC None of the books or diagrams I have show it?????

 

[miesk5]

yo,

bolted to the driver's side of the throttle body

IAC Location, Removal & Cleaning by Bobby (blue) 4th row down on right

one pic;



Location in "Disconnect Concept" Video in a 94; "...another idea i had to save fuel. by disabling the IAC the idle will drop. lower rpm means less fuel burnt...." Source: by pfun41 at youtube.comOverview & Testing; "First let me say this little thing has many names. But they all talk about the same item under the hood. Here all the names I’ve had the torture of learning throughout the years: Idle Air Bypass •Idle Air Control •Idle Speed Control •Throttle Bypass Air •Idle Bypass •Inlet Air Controller •Inlet Air Bypass •Intake Air Bypass •Intake Air Control..." Source: by Ryan M (Fireguy50) at fordfuelinjection.com "...IAB TESTING

This is really easy to test. First as with all problems you should gather the trouble-codes from the computer. Follow the codes for testing and repair. If you get a code that points to a problem with the IAB start the vehicle and bring the engine up to operating temperature. Allow the engine to idle without any driver input to the throttle or pedal. Go under the hood, and disconnect the electrical connector to the IAB. If the engine begins to stubble or stalls the IAB is functional and does not need to be repaired. If the engine idle does not change you should remove the IAB for inspection.

The IAB can pass and still need repair, or it can fail and not need replacing. The plunger and internal spring can get clogged with dirt and oil. This will slow down the air flow and not allow the IAB to function properly. Remove the IAB and clean it. There are 2 halves to the IAB, and you can not buy just one half, but you can take it apart to clean it. But if the internal solenoid is faulty the IAB needs to be replaced..."

-----

Idle Air Control (IAC) Sludge; Poor Idle TSB 91-25-07 for 85-92 Bronco & F Series & many others; "...Hard cold starts, hesitation and stalls on initial start-up or during idle or decel may be caused by sludge in the throttle body and/or idle by-pass valve. Sludge deposits or oil film on the throttle body bore and plate or the idle air by-pass valve may cause one or more of the following conditions. Hard Cold Start, Stall On Initial Start-Up, Stall During Idle, Stall During Decel, Rough Idle, Rolling Idle, Hesitation During Acceleration. A new idle air by-pass service kit (F2PZ-9F939-A) is now available for service use to correct sludge contamination concerns of the throttle bore and plate only. It eliminates the need to clean the majority of past model throttle body applications. Cleaning is not required on sludge tolerant throttle body designs released for 1991 and newer model years..." Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net

READ MUCH MORE

Semper Fi

 

[JAR HEAD_56]

yo,

bolted to the driver's side of the throttle body

IAC Location, Removal & Cleaning by Bobby (blue) 4th row down on right

one pic;



Location in "Disconnect Concept" Video in a 94; "...another idea i had to save fuel. by disabling the IAC the idle will drop. lower rpm means less fuel burnt...." Source: by pfun41 at youtube.comOverview & Testing; "First let me say this little thing has many names. But they all talk about the same item under the hood. Here all the names I’ve had the torture of learning throughout the years: Idle Air Bypass •Idle Air Control •Idle Speed Control •Throttle Bypass Air •Idle Bypass •Inlet Air Controller •Inlet Air Bypass •Intake Air Bypass •Intake Air Control..." Source: by Ryan M (Fireguy50) at fordfuelinjection.com "...IAB TESTING

This is really easy to test. First as with all problems you should gather the trouble-codes from the computer. Follow the codes for testing and repair. If you get a code that points to a problem with the IAB start the vehicle and bring the engine up to operating temperature. Allow the engine to idle without any driver input to the throttle or pedal. Go under the hood, and disconnect the electrical connector to the IAB. If the engine begins to stubble or stalls the IAB is functional and does not need to be repaired. If the engine idle does not change you should remove the IAB for inspection.

The IAB can pass and still need repair, or it can fail and not need replacing. The plunger and internal spring can get clogged with dirt and oil. This will slow down the air flow and not allow the IAB to function properly. Remove the IAB and clean it. There are 2 halves to the IAB, and you can not buy just one half, but you can take it apart to clean it. But if the internal solenoid is faulty the IAB needs to be replaced..."

-----

Idle Air Control (IAC) Sludge; Poor Idle TSB 91-25-07 for 85-92 Bronco & F Series & many others; "...Hard cold starts, hesitation and stalls on initial start-up or during idle or decel may be caused by sludge in the throttle body and/or idle by-pass valve. Sludge deposits or oil film on the throttle body bore and plate or the idle air by-pass valve may cause one or more of the following conditions. Hard Cold Start, Stall On Initial Start-Up, Stall During Idle, Stall During Decel, Rough Idle, Rolling Idle, Hesitation During Acceleration. A new idle air by-pass service kit (F2PZ-9F939-A) is now available for service use to correct sludge contamination concerns of the throttle bore and plate only. It eliminates the need to clean the majority of past model throttle body applications. Cleaning is not required on sludge tolerant throttle body designs released for 1991 and newer model years..." Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net

READ MUCH MORE

Semper Fi

Thanks, figured it out yestrday. My IAC is clean...., still having idle problem. I am going to reset ntiming this weekend. keep fingers crossed

 

[Gamma4diesel]

Make sure all your spark plugs are firing. Check your fuel pressure, air filter, and air valve on your air injection system. What codes did you get?