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Extremely high RPMs?

Tiny
ERIC BRINKERHOFF
  • MEMBER
  • 1999 FORD EXPLORER
  • 4.0L
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 190,000 MILES
In drive vehicle will super tack wheels almost spin intermittent. Accelerating from a stop or braking is when this takes place.
Thursday, November 3rd, 2022 AT 3:47 PM

6 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,418 POSTS
Hi,

Do you mean the RPMs are very high when you accelerate? If that is the case, that sounds like the transmission is slipping. Is it possible for you to record what is happening and upload it for me to hear and see?

Let me know.

Joe
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Thursday, November 3rd, 2022 AT 8:20 PM
Tiny
ERIC BRINKERHOFF
  • MEMBER
  • 4 POSTS
It's like someone's got their foot on the accelerator happens when the vehicle is in drive. From 650 RPMs to 3,000. Have to put in in neutral and kick it down.
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Friday, November 4th, 2022 AT 2:49 AM
Tiny
ERIC BRINKERHOFF
  • MEMBER
  • 4 POSTS
Going to destroy the engine or end up in a crash dangerous.
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Friday, November 4th, 2022 AT 2:52 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,418 POSTS
Hi,

It does sound dangerous. Have you inspected the throttle cable for kinks, fraying, or anything that would prevent it from releasing?

The throttle cable runs from the throttle pedal to the throttle body under the hood. I attached a pic below. See if that cable is allowing the throttle to full release. Have a helper (with the engine off) press and release the throttle pedal while you watch for operation.

You will need to remove the plastic shield on top of the engine. Then, you will have access.

See pics 1 and 2 below and let me know what you find.

Take care,

Joe

See pics below.
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Friday, November 4th, 2022 AT 7:53 PM
Tiny
ERIC BRINKERHOFF
  • MEMBER
  • 4 POSTS
Checked throttle cable okay. Checked and cleaned throttle plate inspection of same revealed no issues. Will replace ICV whenever wallet allows. Many thanks. Eric
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Saturday, November 5th, 2022 AT 10:32 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,418 POSTS
Eric,

If you want, you can service the idle air control valve. If you do it, make sure there is no corrosion or carbon build-up where it's mounted.

Here is a link that explains how to service one. It's worth a try and won't cost anything.

https://www.2carpros.com/articles/idle-air-control-valve-service

I totally understand the wallet concept. This may help.

Let me know.

Take care,

Joe
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Saturday, November 5th, 2022 AT 9:09 PM

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