Idle dying engine: solved!

[Erwin]

Hi guys,

I was having that particular "idle" problem with my Explorer. Mine is a Sport-99 with the SOCH 4.0L engine. My problem started yesterday when finally the engine wasn't able to keep revolutions once the accelerator pedal was depressed. Even running on the street the engine would died if the pedal was completely release. The problem was now consistent no matter if the engine was cold or hot.

Then, I searched at this forum and some others and found about the Idle Control Valve problems. I wasn't able to remove the IAC. The two bolts were very heavy and I almost damage one of them so I decided not to thouch the part at all. I even not sure if I was trying to remove the correct part.

Instead, I decided to remove the 4.0L plastic cover and remove this part, which I don't know its name, but is also connected to the Air flow system from the throtle and mounts with two regular 8mm bolts over the plastic manifold right in the middle.

The part was very dirty with carbon deposits in its inside. I also removed the mounting base which is attached with four torx-15 bolts. Also cleaned this part.

Also cleaned the interior of the throtle. I noticed the factory label warning not to do it but I have to solve this problem today.

...and... TATAAAA!!! The engine started with a little doubt but immediattely remained steady at 1k revs. Subsequents tests resulted completely normal. I was so HAPPY!!!

Now, my questions:
1. what is the name of this part located below the 4.0L plastic cover?
2. where is exactly located the IAC valve? A photo would be very appreciated.

Regards and hope this can help someone else.

 

[Glacier991]

Congrats you just cleaned the Mass Airflow Sensor (MAF). Do a search and read up on it!

 

[MDPuckett84]

sounds to me like you cleaned the IAC valve. It's under the 4.0 SOHC cover that you took off, top of the engine, held on by 2 bolts, which i think are 8mm. Not sure what you were trying to remove before, but if you didnt have to take off the cover to get to it, it wasnt the IAC

edit, here's a pic:
IAC Valve

Also, you may want to look into cleaning the MAF, which is attached to the air filter box, but search and read up on it first as it is a some what delicate piece.

 

[Glacier991]

DUH, you're right of course. He'd never have gotten past the torx security screws. My mistake. thanks for pointing it out !

 

[Erwin]

found out all parts names

Hi guys!

First... thanks for the time to respond and the pics!

The part that I cleaned was the Idle Control Valve. The part that I tried to remove and wasn't able was the Throtle Position Sensor and the MAss Air Flow is the one with the Torx security bolts immediately after the Air Filter canister.

Check this site for pictures and instructions on removal: www.autozone.com

Regards,