what do i neeed to look for to fix a rough idle

Asked by Jun 12, 2014 at 02:12 PM about the 2004 Jaguar S-TYPE 4.2

Question type: Maintenance & Repair

I have already changed plugs, coil packs, radiator , water pump , left and right side cam pos sensors and still no luck.

2 Answers

222,765

Check for Vacuum leaks, and clean throttle body and idle air control of carbon. You can purchase some throttle body cleaner at any auto parts store.

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