I have a high revving Ranger, what could it be?

[Lonesome7.3]

I am not getting a check engine light, would the scanner still help?

 

[Wyley87]

I am not getting a check engine light, would the scanner still help?

My brothers truck didn't have SES light either.

With a scan tool you should be able to look at TPS % open

 

[Lonesome7.3]

Cool, I will try and find some with a scanner.

 

[slims]

Fine then... I'll go back to the drunk thread.

 

[Wyley87]

Fine then... I'll go back to the drunk thread.

Probably a lot funner over there!

Didn't mean to step on your toes Slims.

 

[Wyley87]

TPS Showing to be about $23 from Autozone

http://www.autozone.com/autozone/pa...?filterByKeyWord=TPS+sensor&fromString=search

 

[slims]

I'm just being dumb. if it's not what you suggest I was serious about the sensor though it's pretty common.

 

[Wyley87]

I would think that if it was the MAP it the engine would be idling rough right?

Or I could just be a dumb A$$!



Seriously though a scan tool should be able to tell you either or.

 

[slims]

It causes the engine to surge, especially at idle. If I read the first post right, that's what it's doing? Am I wrong?

 

[Wyley87]

Found this on Wiki:

Why would your 99 Ford Ranger 5 speed repetitivly rev up to 3000 rpms while you are idling at a stop light with your foot off the gas and then suddenly drop back down to normal?
In: Ford Ranger
Answer
replace tps ford had a tsb about this
sorry to complicate things, i have had my ranger for 4 years 3/12 of which have been speant trying to figure out something similar, it only happens in warm weather, usually at high altitudes it does not do it, it only gets worse. i have run into only a couple people on-line to have the same problem. i have change tps iac and just replaced mass air flow sensor, only have 20 miles with it on but hopefully that was the ticket.
it could be the air flow silinoid remove the silinoid and clog the hole with your finger and see if it idels down . its located by the tps

I had the same problem with my 2000 Ford Ranger revving to about 3000 rpm for no reason and then dropping back down to normal. The problem was the idle air control valve was bad. You can get a new one at any autoparts store for about $50 and that completely fixed the problem. In fact it actually runs better now and idles at a lower rpm.

http://wiki.answers.com/Q/Why_would...as_and_then_suddenly_drop_back_down_to_normal