Throttle Body?

jberks

Senior Member
Joined
May 12, 2004
Messages
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Location
M1, Outside lane, somewhere between Leeds and Lond
Your Mercedes
Jaguar XF 3.0 S, LR Freelander 2, Fiat 500 & Fiat Panda
Hi all,
Still trying to figure out the poor idle. Since changing the plugs, things are a whole lot better, but they're not perfect. When cold, a get a slight shake that when creeping in gear (backing out of the garage) can transfer to the road wheels and give an amost warped brake feel. When warm, it vaires from perfectly smooth to a bit juddery, I never know what to expect from one stop to the next. Left idling for more than 30 secs or so, it starts to knock a bit most of the time. Knowing the throttle body is a weak point, could it cause these symptoms?
 

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