I have replaced all spark plugs and two coils, I continue to have misfires and the coils are "melting"...I have already replaced gaskets but continually get engine light coming back on within a week of service, particularly after a bit longer drive (i.e. 40 - 100 km) at a time. Any ideas?
SOURCE: Missfire on number 3 coil on 2001 S type Jaguar 3.0 V6 Sport
Check the igniter module.
I assume you have a ecu code telling you #3 coil is missfiring ?
If so also check the crankshaft angle sensor .
If it is not an error code do a compression test and check the injector.
Hope this helps
Regards
George
SOURCE: Engine light continues to come
Hi Caes431,
It would not be enough just to have the codes cleared. Whatever caused the warning to come on the first time, must be attended to and rectified. As the warning is still coming on it means the reason has not yet been attended to.
The vibration as you've described it may be caused by the same problem, as it would seem to be coming from rough engine performance and could be related to the emission control.
The jolt you're experiencing would seem to be something to do with the brakes....I would suggest that further investigation is required with particular attention paid to the fitting of the calipers.
Regards Jonhgee10
SOURCE: have a 1st cylinder misfire in my 2002 jaguar s-type
Difficult to say here as with a lot of modern engines they have all these covers over the engine and this i think causes them to run too hot around the head area where the coil packs are and as they are only copper windings i think this build up of heat causes them to fail ,unlike my XJ6 where it has a external coil with a dist cap .Also make sure the plug gap is correct 25th as some of these high frequency coils are specified with a wider gap which means the coil is working overtime to jump the gap ,i like to use bosch plugs with the multiple 3 connection firing electrodes as they last a long time and can be re.gapped and yes i know some garages throw their hands up and say replace but i feel this is only for the profit margin on renewing all the time .If the plug gap becomes too wide then this is causing the coil to burn out ,pluga should be re-gapped every 10000miles or am i just a old time has been who was taught different on cars with rod brakes and side valve engines
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