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dhallworth



Member Since: 10 Oct 2011
Location: Glasgow
Posts: 3033

United Kingdom 2012 Range Rover Autobiography TDV8 Baltic Blue
Melted Ignition Coil

As per my other post, I recently solved a misfire on my 4.2 Supercharged by replacing a melted ignition coil.

Click image to enlarge


I've been thinking over the last couple of days, what would cause a coil to melt? Would it just be old age and the insulators on the coil failing or could there be something on the car?

The plug from that cylinder didn't look bad when I removed it either. I've since replaced them all with the proper NGK originals. The ones I removed were Denso but I can't imagine that making any difference.

Click image to enlarge

Click image to enlarge

Click image to enlarge


I've done a couple of miles in it since replacing the coil as I put it in the garage to do a few other jobs on it including replacing the plugs, etc. After doing that short trip the coil didn't feel hot to touch.

Having had one Range Rover catch fire already, I don't fancy having another with something like this so was wondering what everyone else's thoughts were?

Thanks,
David. 2002 4.6 Vogue SE - Alveston Red with Lightstone Leather
2007 Range Rover Supercharged in Java Black with Ivory Leather
2012 Range Rover 5.0 SC Autobiography in Indus Silver with Jet/Ivory Interior
2012 Range Rover 4.4 TDV8 Autobiography in Baltic Blue with Sand Interior

Post #578517 5th Jan 2021 3:00pm
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dennij



Member Since: 24 Feb 2019
Location: Up North
Posts: 450

United Kingdom 2011 Range Rover Vogue SE 4.4 V8 Buckingham Blue

Assuming that the wiring to the coil pack is good, i.e. no signs or burning or hardened or cracked insulation, I would say it's a fault that has occurred on the single coil. As you have already checked for excessive heat with your replacement it would seem to suggest that all is well, however, it won't hurt just to check it for a bit for your own peace of mind. 2011 TDV8 Vogue SE

Post #578528 5th Jan 2021 4:00pm
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