P1 Idle speed when cold?

[marty]

Hi
When i start my P1 in the mornings it fires up to 1000rpm for a few seconds then drops to 800rpm for a second or 2 then goes back up to 1000rpm and stays there,when i drive the car down the road and put my foot on the clutch the revs drop down to 750rpm then go back to 1000rpm .Do other P1's act the same way?
marty

[Mickle]

Have you got your air-con on?

If not it's probably one of your sensors on the way out like the MAF sensor. You running normal air filter? Pretty sure there is an idle control valve aswell that might need a clean.

[Dave]

Mine used to do something like that. Took it to the garage and they sorted it out. No idea what they done.

[Kev]

Marty,

Welcome. Glad you made it after my prompt on Scoobynet :wink: Do you have any mods, dump valve etc?

[Carl WIndsor]

Welcome to the club Marty

[marty]

My car is standard apart from back box and centre pipe.I have had fitted the MAF and temperature sensor by the garage who then said nothing else controls the cold start
marty

[Kev]

Ok, this morning when I started the car the idle was at 1500 rpm. After about a mile it was at 1100 rpm b4 settling down to 800 rpm when warm. Sounds like an abnormality there.

Is the car still under warrenty?

[marty]

the car is no longer under warrenty.Does your revs drop at all bellow 1100rpm even when you first drive the car and then press the clutch in
marty

[Kev]

No, althought you can hear a difference in engine sound. This is probably because the engine will have less work to do when not turning the gearbox.

[jag]

heres one for you guys.

do you ever take notice of the rev counter when giving it some. i noticed that when the loud pedal is flat, and i lift off to change gear, or even just ease off it a little bit, the rev counter stil ticks forward a little bit before starting to drop again.


so if i go to change gear at say 5k RPM, even when i've lifted off loud pedal and clutch is down, the rev counter will bump up to 5.1 or 5.2k. as though its playing catch up with the actual engine speed....

[Viv]

so if i go to change gear at say 5k RPM, even when i've lifted off loud pedal and clutch is down, the rev counter will bump up to 5.1 or 5.2k. as though its playing catch up with the actual engine speed....

Hi Jag
Could it be the turbo pressure taking a moment to vent away? Not my field of expertise :oops: , but I would have thought that rev counter shouldn't need to catch up with engine speed. Whenever I boot it, I don't have time to look so closely at the rev counter :lol:

[Dave]

heres one for you guys.

do you ever take notice of the rev counter when giving it some. i noticed that when the loud pedal is flat, and i lift off to change gear, or even just ease off it a little bit, the rev counter stil ticks forward a little bit before starting to drop again.


so if i go to change gear at say 5k RPM, even when i've lifted off loud pedal and clutch is down, the rev counter will bump up to 5.1 or 5.2k. as though its playing catch up with the actual engine speed....

I suppose I am going to have to have a rag in my car now and find out, dam :lol: