2004 ford explorer v8, throttle body replaced, still causing same issue. mechanic doesn't know what to do. used to be able to correct issue by restarting the car. now it no longer resolves the issue.

Mechanic hooked it up to ford diagnostic computer. He thinks its the computer too.?????? Not a very good mechanic if he can only think an not know for sure . Hook up a lab scope to the crankshaft an camshaft sensors .
https://www.youtube.com/watch?v=X6ebhNqnw64&feature=youtu.be&utm_source=NGK+Tech&utm_campaign=ef8bdf44e5-EMAIL_CAMPAIGN_2019_07_09_06_17&utm_medium=email&utm_term=0_2147b70c6b-ef8bdf44e5-214018433

If it is a single overhead can 4.6 liter v8 the intake manifold is notorious for leaking on that model of ford engine I just replaced one on a friends explorer the seal on the intake manifold deteriorates causing the leak and replacement of the manifold is the only solution! Good luck!

That is a code for the TB. Throttle Actuator Control (TAC) Throttle body Air Flow Trim at Max Limit

Remove the throttle body and give it a good cleaning. Use cleaner specified for cleaning throttle bodies, do no use standard carb cleaner

the iac code has nothing to do with the maf . the maf is your mass air flow sensor and it is in the air tube going to the throttle body. the iac is your idle air control valve that is in the throttle body next to the throttle position sensor

The V6 and V8 models are mounted on the side of the throttle body.
They don't turn on, its an electric motor that opens and closes a valve to regulate the air into the throttle body.

watch these videos and you will see what you need to do. 1999 Ford Ranger Idle Air Control Replacement 1999 Ford Ranger cleaning the throttle body part 1 YouTube Testing and Replacing Throttle Position Sensor Ford Explorer you will notice a world of difference.

try disconecting the battery for about 40min and leave the key in the on position while its disconected, turn off the key and reconnect the battery this will reset the ecu and may help your problem good luck and please rate

Go to a auto supply house and purchase a GOOD service manual such as Haynes, etc.... And it will walk you through servicing your vehicle step by step, what you need to purchase and the correct tools to use, I found it is wise to check the book in the parking lot before you Leave to be sure there are no additional supplies that I would have to make another trip for. If you are in doubt take your vehicle to an authorized FORD Mechanic for repair/replacement. If I can help further please let me know.

I hope that this advice helps you tremendously and please do not forget to rate/vote or place a testimonial to my advice.

Wicked Angel

wondering if anyone has actually replaced the throttle body and whether that corrects the problem . More two it then that , could be the gas pedal assembly . Either or throttle body , wiring problem . Electronic Throttle Control System Diagnosis Diagnostic Quick Tips Snap on...

The Idle air control valve (IAC) is on the back of the throttle body housing on the 4.6 V8, it's half the size of a can of Red Bull. Try tapping on it with a small hammer and if the truck clears up then it's time to replace the IAC.
You can clean it with Throttle body injector but that's just a quick fix for now. Good luck and hope this helps.