Car revs abnormally high when started up

[thewraith]

Hi all,

As far as everything else is concerned my 99 c4 is fine. However sometimes when starting the car- it revs very high right on startup then comes back down. Is this normal? I've never seen it in other cars.

[RFM]

The car should not overrun 1000 RPM, check if the throttle cable tension is not too hard, he needs a little "play".

[1999Porsche911]

The car should not overrun 1000 RPM, check if the throttle cable tension is not too hard, he needs a little "play".

Since you don't have a throttle cable, don't waste too much time looking for it. :P

It is normal to have a slightly higher idle when the car is first started from cold. It should only last a short while and then drop back to normal.

Edited June 30, 2008 by 1999Porsche911

[CJ_Boxster]

When you start the engine when cold, it should rev past 1200 rpms then come back down to about 900-1000 till the engine warms up a bit, then lower to about 850-900 rpms.

[thewraith]

The car should not overrun 1000 RPM, check if the throttle cable tension is not too hard, he needs a little "play".

Since you don't have a throttle cable, don't waste too much time looking for it. :P

It is normal to have a slightly higher idle when the car is first started from cold. It should only last a short while and then drop back to normal.

My car DOES have a throttle cable- it's attached to the throttle body that I removed when I did the oil filler tub fix. What a HUGE HEADACHE.

[1999Porsche911]

The car should not overrun 1000 RPM, check if the throttle cable tension is not too hard, he needs a little "play".

Since you don't have a throttle cable, don't waste too much time looking for it. :P

It is normal to have a slightly higher idle when the car is first started from cold. It should only last a short while and then drop back to normal.

My car DOES have a throttle cable- it's attached to the throttle body that I removed when I did the oil filler tub fix. What a HUGE HEADACHE.

Then you are not talking about a 1999 C4 as they do not have a cable. What kind of car DO you own?

[thewraith]

The car should not overrun 1000 RPM, check if the throttle cable tension is not too hard, he needs a little "play".

Since you don't have a throttle cable, don't waste too much time looking for it. :P

It is normal to have a slightly higher idle when the car is first started from cold. It should only last a short while and then drop back to normal.

My car DOES have a throttle cable- it's attached to the throttle body that I removed when I did the oil filler tub fix. What a HUGE HEADACHE.

Then you are not talking about a 1999 C4 as they do not have a cable. What kind of car DO you own?

a 1999 c4 :)

The whole EGAS thing drove me nuts since I ordered one new maf sensor from ebay- it was the wrong one. Then went thru pelican- it was the wrong one. And finally took the old one out and took the part number- NOT EGAS :(

It is surely a C4 thou, according to both the title and the way all 4 wheels spin :)

Edited December 1, 2008 by thewraith

[1999Porsche911]

The car should not overrun 1000 RPM, check if the throttle cable tension is not too hard, he needs a little "play".

Since you don't have a throttle cable, don't waste too much time looking for it. :P

It is normal to have a slightly higher idle when the car is first started from cold. It should only last a short while and then drop back to normal.

My car DOES have a throttle cable- it's attached to the throttle body that I removed when I did the oil filler tub fix. What a HUGE HEADACHE.

Then you are not talking about a 1999 C4 as they do not have a cable. What kind of car DO you own?

a 1999 c4 :)

The whole EGAS thing drove me nuts since I ordered one new maf sensor from ebay- it was the wrong one. Then went thru pelican- it was the wrong one. And finally took the old one out and took the part number- NOT EGAS :(

It is surely a C4 thou, according to both the title and the way all 4 wheels spin :)

And you are telling us that the throttle is controlled by a single cable from the pedal to the passenger side of the throttlebody? If that is the case, there is something suspicious about your engine. Are you the orginal owner and was a different engine put in the car?

Edited December 1, 2008 by 1999Porsche911

[thewraith]

The car should not overrun 1000 RPM, check if the throttle cable tension is not too hard, he needs a little "play".

Since you don't have a throttle cable, don't waste too much time looking for it. :P

It is normal to have a slightly higher idle when the car is first started from cold. It should only last a short while and then drop back to normal.

My car DOES have a throttle cable- it's attached to the throttle body that I removed when I did the oil filler tub fix. What a HUGE HEADACHE.

Then you are not talking about a 1999 C4 as they do not have a cable. What kind of car DO you own?

a 1999 c4 :)

The whole EGAS thing drove me nuts since I ordered one new maf sensor from ebay- it was the wrong one. Then went thru pelican- it was the wrong one. And finally took the old one out and took the part number- NOT EGAS :(

It is surely a C4 thou, according to both the title and the way all 4 wheels spin :)

And you are telling us that the throttle is controlled by a single cable from the pedal to the passenger side of the throttlebody? If that is the case, there is something suspicious about your engine. Are you the orginal owner and was a different engine put in the car?

Yes that's what I have- no I'm not the original owner of this car. Hmmm.now you're making me wonder- where would I look to check for matching vins??

thanks

meek

[Loren]

Can you take a picture of your throttle body and post it here?

BTW... does your car have PSM or TC (Traction Control)?

Please PM me your VIN.

[Loren]

The car is a C2 according to the VIN.