Ford Ranger
Chevy S-10
New Electrical Work

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?


Top Answer
User Avatar
Wiki User
2010-05-23 18:18:18
2010-05-23 18:18:18

Might have something to do with the timeing. I have a 1991 ranger that would drop down to 500 RMP from 1.5K when idleing before i lost my timeing.

Answerreplace 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.

User Avatar

Related Questions

It could be a sticking valve lifter. If you didn't hear it before, it should be investigated. Ticking is not normal.

A low oil pressure reading when idling for a 1986 Fiero is normal. As long as the oil pressure goes back to normal when the car is being driven, there should be no problem. If it is not, then the oil pressure sensor or the oil sending unit should be looked at.

Engine temperature rising when the engine is idling is normal. The car is sitting still and no air is entering the engine compartment. This will cause the engine temperature to rise. The cooling fans then come on and the engine returns to a normal temperature. Unless the cooling fans do not bring the temperature down, you have no problems and this is totally normal.

Mine is between 500 and 600 rpm's after the engine is warmed up.

No, it's not normal. It may be a burst cyst. Go and speak to your doctor

If they have suddenly changed colour that is not normal but if they have always been yellow then it isn't very common but it is normal. I have a friend called Bobby who has yellow eyes.

Normal operating temperature 650-750 RPM it should be between 0.5 and 1

Normal would be 25-30 psi. 10 psi would be the minimum.

No. It should be idling around 650 warmed up. Look for a possible vacuum leak.

There are 11 mission in all.. and you have special missions additionally..

i have the same car and mine stayes 40 to 60 psi depending on if your driving are idling

It is normal for a temperature gauge to go up a little bit until the thermostat opens up and the cooling fan comes on. As long as it is not going out of the normal temperature range it is fine.

Chances are, particularly if this is an automatic transmission, you are low on tranny fluid. To check this, the engine needs to be at normal operating temperature and idling. Checking tranny fluid when the engine is cold and not idling will give a false reading, indicating that it is full ...

Nothing - carry on as normal and live your life happily. He is your ex and he was that for a reason.

No, it's just the skin's production of melanonin. Very normal and common. I wouldn't worry about it.

If there eyes were normal they may change suddenly or else get an eye exam at your eye doctor.

You cant. Ho-Oh is another one of those legendary Pokemon who cannot be caught in Pokemon Ranger. Through normal play or Action Replay, you cannot capture it.

There signs for normal, non-legendary pokémon. When you complete certain quests, you will get them.

Copyright ยฉ 2020 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.