clk430 lumpy idle

[meb]

Have a bit of lumpy idle on my y2k clk 430 v8 and a slightly bumpy creep. I took it to an independent MB garage and he said it is normal and MB had a few complaints about the lumpy idle when these cars were new - anyone else heard this?

No other problems with it at all but anyone know how this idle could be made smoother?

Thanks

 

[sasha]

i have the 320 which you will be quick to note is only V6.

i experience the same

I have been told that this is characteristic of my engine.

dunno if it is true about yours

dunno if it is true at all

but at least there is 2 of us wondering

 

[BaldGuy]

My old C240 V6 Sport did this as well, I tried changing coils, plugs etc and nothing fixed it, It wasn't very bad but the engine did rock about slightly in the engine bay... I just lived with it in the end....

 

[saorbust]

Erm had both V6 and V8 versions of the 208 CLK. I'd suggest you check for a misfire - its common on the V8 especially (16 plugs and leads ! Ouch !).

Had them replaced on the AMG - thanfully under warranty. Same problem - slight 'wobble' whilst idling.

Get a dealer to check.

 

[sasha]

sounds interesting, does that mean you had a smooth idle post adjustment?

 

[saorbust]

Yes no wobble or shake once adjusted. Turned out to be the HT leads, causing one of the spark plugs on cylinder 7 not to fire. Stress this happened on the AMG engine, not the V6's.

For the V6's - its a naturally unbalanced engine anyway, so it has a counterbalance shaft to stop the 'shake'. I've never experienced it though - I had both a Coupe and a Cab - neither had a wobble. I'd definately get it checked at several difference dealers.

Cheers.

 

[grayb]

That's interesting - I was wondring if our C43 was a little uneven at tickover the other day... Only noticeable in Neutral, not when in Drive. I suppose 1 plug out of 16 wont make that much difference to the performance when just pottering about!

 

[Mambo]

Noticed the odd 'twitch' on mine when sat at traffic lights, will get it checked out before my warranty runs out!