the engine starts and accelerates by itself to 4000 rpm!?
then goes to fail safe mode
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1999 Jaguar XK8 Question: engine accelerates by itself then goes to fail safe
Answer #1patrick mannion from Greg Solow's Engine Room, May 21, 2010, 11:03Master
Jaguar had some trouble with the throttle body housing. Jaguar do have a bulletin about improper throttle cable adjustment causing problems. IS there any independent Jaguar repair shop in your area that is knowledgeable in the repair of Jaguar. There are few electronic scantools that operate well for diagnosing Jaguars and the ones that work well for Jaguar are expensive.
Replyrcolgrp, May 21, 2010, 11:12Rookie
the shop says it might be throttle body (says it costs 2,500.00 remanuf???!!!) or the computer that controlls it??