C180 Idle Problems

[OAPJinx]

Hi

Just bought myself a 1997 c180 Elegance auto- love the car. Only got 60K on the clock with full service history - safe bet I thought.

However I have subsequently noticed that when the car warms up it idles roughly, it seems to tick over at about 600rpm which seems low?

I have booked it in for a service on Tuesday and they are going to plug the diagnostics in and see whats what but would appreciate any advice on what it could be

Thanks

 

[Myros]

It could be a variety of causes

Might even just be something as simple as mucky plugs reaching the end of their lifespan.

 

[kiwi_bloke]

maf?

Get some diagnostics done.

While the speed is about right, the roughness can be caused by a faulty MAF. My car has done 60k km and its just got a new MAF. Tell tale signs include black plugs, and there should be a fault code.

Is there any hesitation on acceleration?

 

[OAPJinx]

Got it sorted - cracked HT lead - replaced and all running fine now

Cheers