Why is my car rev'ing on its own?

Question:
everytime i start the engine the revs go up to around 40 and im not even pressing the accelerator. its fine when im driving around but when i put clutch in it revs again and when its stationary it does it too? what could it be?

Answers:

What's your best mod to your car to save fuel?

its a sticky clutch or your automatic choke is stuck??

Tranny hesitates to shift from 2nd to 3rd and revs high when engine cold, when warm it shifts ok. ideas?

It means your timing is out.Leanne

How do you test a fuel regulator?

Or your accelerator cable is sticking

Is not having enought radiator fluid a cause for lowered gas mileage?

contact dealership

What is the best way to ship a headliner board?

Throttle adjustment problem?Ask to a car service.

Where can I send samples of transmission fluid to be sure my mechanic used the right stuff?

You never gave a year make and mdel of the car. this is always needed when you talk about car problems. If it is computerized you may have a computer that is attempting to compensate for information coming from a sensor. If you have ever seen a computer diagnostics done on a car they car make your car do all sorts of neat things with out anyone being behind the wheel. they can increase the RPM they can stop the engine, they can even create a mis-fire. The computer relies on the information coming from the sensors to optimize your fuel economy and reduce your emissions. you could also have a stickly throttle body, a mis-adjusted cold idle air control vavle. your you may even have a faulty O2 Sensor. Now if your car is carberated then I would beleve that you have a mis-adjusted Choke. Hope this helps.

1990 Chevy Lumina Engine And Trans?

Idle air controll motor or a vacume leak really need more info on the car

How do i stop my new alternator on my corsa from making a whirring noise whilst driving?

Either sabotage of the line (shortened) or a stuck link of the accelerator;
or, if a computer new car type, you may have inadvertently changed the programming by hitting the gas pedal while turning the key to start. Computer set ignition requires no stepping on the gas pedal to start the car.

Bulldog car security alarm.?

Can't be positive but I was having this same problem and I had my timing belt replaced. You might want to have your ignition coil looked at too. My car is running great now. Good luck to ya ~

My head gasket and timing belt need replacing on my vauxhall corsa?

Trunk won't SHUT!?

This condition could be caused by vacuum leak,a sticking throttle cable,lever or butterfly, a sticking idle air control valve, a leaking throttle body gasket, a faulty coolant sensor, or if it is only noticeable once th engine has warmed up, a faulty O2 sensor.

Having an idle problem with a Dodge Stealth?

If your car has a secondary air pump fitted then it could be dumping air onto the O2 sensor causing it to switch low, but once again this would only be noticeable after warm up.

How much to change fuel injectors?

We really need to know the year, make, model and engine size and configuration (3.0 V6 etc) to help any further.

My car stopped moving this morning and they said it was so bone dry out of gas that it fried the fuel pump...?

Cheers

Lift kit for my blazer?

Geordie

Replacedintake manifold antifreeze in sparkplug hole.car is missfiring?

Idle Sensor

More Questions & Answers ...

Can i replace the rack and pinion myself?

How do I remove a spoiler from a car?

Can i use a new nissan key fob on an old key?