my octavia 2002 has an intermittant fault. 70% at idle speed the engine shakes and runs rough and makes the whole car shake! if i just rest my foot on the throttle a tiny bit it cleans right up and purs perfectly.

it has done 267.000 miles and ive done 500 of em!!!!!!!!!!!!!!!

any advice, someone has said new fuel pump?

any help?

cheers

nige

what speed is it idling at?

just under 1000 rpm

cheers for the reply

sounds about the right speed cf my TDi. I am not very familar with the SDI, hopefully someone else will be along shortly.

I had similiar with Mk1 Octavia tdi for about 2 yrs, never showed up on diagnostic at Skoda dealer or VW dealer, fault only intermittent sometimes idle speed would rise rise up to 1100 slowly then fall back to indicated 850. Sometimes on starting - hot or cold- the revs would go very high - 2000 or so and immediately drop back. Also there would be a short burst of smoke whilst driving along at constant speed. The glowplug light would sometimes stay on until the engine was started - regardless of actual temperature. The "Trade" could not come up with a solution though quite willing to start changing major items at my cost, ie fuel pump,injectors, turbo blower.

I bought a new coolant sensor, fitted it, and all problems dissapeared. cost about £10 from Jorilly.com or £20 from the "trade". The sensor is a four pin device one circuit driving the dash display the other giving an input to the ecu. Hope this helps someone for a fix and not having to put up with the main dealer' Bull Feathers!!

Edited 13 July, 200916 yr by shemart@blueyon
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