2004 Ford ranger Idle control system

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Old 05-18-10, 10:53 AM
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2004 Ford ranger Idle control system

Hi,
My 2004 ranger (2.3L) is idling low and the check engine light is on. I'm Getting P0506 Code, sometimes the idle is so low the truck is stalling and the throttle response is bad.
Is cleaning the throttle body going to help? What is the best way to clean the throttle body?
 
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Old 05-18-10, 02:06 PM
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Cleaning the throttle body is the least expensive repair attempt
I have had good results by----

Warm engine to near operating temperature.
Remove the airfilter connection boot.
Tie the throttle in wide-open position.
Spray Carb. & Choke Cleaner on the inside surface of the body.
If really dirty, scrub with a toothbrush.
Spray again. I seldom use more then 1/2 can to clean a TB.
Let cleaner work for about ten minutes or so, and UNTIE THROTTLE.
Crank engine( Did you UNTIE THROTTLE) and keep it raced up until all the black,blue,white smoke clears.

Take precautions to eliminate spraying the switches attached to the TB
 
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Old 05-18-10, 04:34 PM
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Thank you Giles,
Did'nt have time to buy carb cleaner, I wiped the TB using alcohol and then started the truck, it is running good now. Tomorow I'll grab TB cleaner on my home.

Beer 4U2
 
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Old 05-20-10, 05:45 PM
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Cleaning the TB did not help

I sprayed TB cleaner, scrubbed and wiped. Now the engine is idling at 1500-2000 RPM. Should I remove the TB and clean it again? Or is there another problem?
 
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Old 05-20-10, 07:07 PM
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1500-2000 RPM's - does it return to a steady idle that can be anywhere in that range every time you lift your foot off the pedal or does that change happen as a fluctuation?

Did you untie the throttle the second time around?
 
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Old 05-21-10, 07:13 PM
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I did untie it......
It was very steady between 1500-2000 RPM. Yesterday I did spray more TB cleaner and the result was that it goes to 1500 RPM for few seconds then it goes down to 1000. The normal was 700-800RPM. Should I remove the TB and cleane it? or keep spraying TB cleaner?

Beer 4U2
 
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Old 05-21-10, 07:42 PM
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Originally Posted by esalman View Post
I did untie it......
It was very steady between 1500-2000 RPM. Yesterday I did spray more TB cleaner and the result was that it goes to 1500 RPM for few seconds then it goes down to 1000. The normal was 700-800RPM. Should I remove the TB and cleane it? or keep spraying TB cleaner?

Beer 4U2
Assuming you followed my suggested cleaning procedure, I would reinstall the air filter connection and drive the vehicle. When you crank the vehicle with the air cleaner connection removed, you will get a code on some vehicles. This is because the sensor between the TB and airbox will not function properly, and you will have a driving issue.
If you still have an idle issue after a few miles of driving, I would check all sensor electrical connections and check for vacuun leaks.
Please bear in mind that I am not familiar with your particular vehicle and this is a general troubleshooting suggestion.
 
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Old 05-21-10, 08:56 PM
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1st-try remove the neg batt cable/for 1 min-reconnect & try.
this will erase the memory of the engine control module(pcm)
next-with a clean thtottle bore & plate/ unplug the 'iac'-sorta looks like a tin colered cylinder 1-&1/2" dia-close to the throtle body u just cleaned.next-start eng(preferably-warm)
eng should idle -some what slow.
there is a screw,on the throttle plate - to" adjust "base idle rpm.
try this-& reply -with results !-?
 
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Old 05-22-10, 12:44 PM
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iac ford

I had a ford explorer with a simalar problem.it turned out to be the iac (idle air control) a diamond shaped cylinder with 2 8mm screws on top or around tb.all i had to do was remove it spray the inside with oven cleaner rinse it out put it back on . It ran great after that. This remedy came from my local ford tech. Hope this helps. Good luck
 
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Old 05-26-10, 09:08 AM
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Thank you all, It was the IAC valve. I cleaned it and the truck is idling good.
 
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