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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 10-08-2005
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Weird Idling

I noticed today when im idling..i idle at like 500 i think..then it starts jumpin around like down doesnt go up but dont almost 100 RPMs...like its bout to clunk out....i dunno what the deal is but how can i fix it or check stuff to see whats wrong..

now yesterday i hosed my engine down a lil but didnt flood anything so i dunno if i flooded anything or what..

HELP
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Old 10-08-2005
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pull the MAF and clean it with electronic cleaner. you can get it frm auto parts stores. avoid harsh direct spray, the filament is VERY sensitive...
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Old 10-08-2005
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Sounds like you may have wet the TPS (Throttle Position Sensor).
When this sensor has gotten wet.... the computer is confused as to the position of the throttle plate.
With the vehicle and ignition OFF..... remove the connector that attaches to the TPS. The TPS is screwed to the throttlebody with 2 screws and is usually black plastic.
May need to use some compressed air to dry out the TPS and connector.
DO NOT concentrate the compressed air directly on the TPS... Just blow across it....
Another component that can cause this problem is the IAC (Idle Air Controller) sometimes also known as the IAS (Idle Air Solenoid).
Sometimes the solenoid plunger sticks and this will cause the ilde to be irratic... surging up and down. Remove the connector and the two screws and clean the beveled edge of the plunger with throttlebody cleaner and spray some in the hole that you remove the IAC from. Carbon build up will cause the air flowing thru not to be metered properly; causing the ilde problem.

OR 4x4

Last edited by OffRoad 4x4; 10-08-2005 at 09:45 PM.
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Old 10-09-2005
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you think i should just take it to the dealership cuz im still under warranty and just let them mes with it?
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Old 10-09-2005
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I would try drying out the TPS with the pressurized air and remove the harness... just to see. You will save yourself a trip to the dealer if this cures your problem.

On Jeep Cherokees this is a common problem that occurs when pressure washing the engine after a day of running thru the mud.

OR 4x4
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Old 10-09-2005
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that harness is on the intake?
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Old 10-09-2005
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There is a harness that clips onto the TPS (black plastic module that is attached to the throttlebody by two screws). You may need to remove the black plastic dust shield to see most of the throttlebody. There are two components that are attached to the throttlebody; the TPS and the IAC. Both have a connector with a couple wires going to them. The TPS is on the side where it looks like the throttle shaft intersects with it.

OR 4x4
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Old 10-09-2005
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alrighty Charles thanks man..im gunna go see what i can do...
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Old 10-09-2005
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And clean the MAF as well. I had the same problem before...
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Old 10-09-2005
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dont forget the IAC if it was in park or nuetral that is the problem.
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Old 10-09-2005
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i dont think it does it when in park and net. just in drive....

but hasnt done anything today..and i hit some mud and hasnt done it..i took all that stuff off and i think i found the right hting but i dried everything out so maybe i did it
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Old 10-09-2005
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Mine started doing that & they said that I got water almost in my motor when I had the air box mod... But I don't think you'd have that problem since you have the stock airbox...

Brenton
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Old 10-09-2005
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HRII,

Removing the moisture inside the electrical connectors and components should have cured your problem.
By some chance IF the problem comes back.... remove the IAC as I previously posted. Clean the beveled disc on the end of the solenoid shaft with throttlebody cleaner and spray some down the port where the IAC was removed from.... This will allow the IAC to meter the air better controlling the idle properly.

OR 4x4
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Old 10-09-2005
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i did that and it still goin on..i got a appt. to the dealership tomorrow i got a friend that his mom works there and shes gettin me 1st in line tomorrow so it wont take long..
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Old 10-09-2005
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HRII,

Keep us informed as to what the dealership finds.... Be interested to know !!!

OR 4x4
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Old 10-10-2005
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im bout to head out right now so when i get off work i will let you guys know..

kinda makes me mad cuz it only has 16K miles and things are already acting up..thats not cool yah know
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Old 10-27-2005
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My 2004 FX4 Level II has always had a problem with bringing the idle back down when I push the clutch in. Like when I pull off the interstate and kick it into neutral it will idle about 2,000 RPM until I come almost to a stop. Think I will take it in to have it looked at.
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Old 10-28-2005
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Mine did that too, cleaned the MAF and that helped but it had a problem every now and then after that. Replaced the IAC (that I knew was bad as anyone that's been to a meet with me can attest) and it's smooth and clean...
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Old 10-28-2005
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that was wat was wrong with mine..the MAF sensor...replaced that..runs good now...
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