Harry's V12 XJ Coupe - new engine issue

It seems a shame that Harry’s fresh engine needs work already.
What do you think?


Looks to me like Ole Mobeks kit is much simpler, more complete, and easier to install than that contraption Tom Lenthall is installing.


The basic system that Harry fitted to his car has in its basic form has been fitted to V12s since 1975/6 - sure a few issues but basically still works.

I think Harry has been sold a pup with this new system - sure it will work but at a cost of over £20,000 I think the mechanic is pushing his own system. Any half decent V12 mechanic would have been able to sort the old system for very much less cost.

Harry seems locked into this guy, maybe he also needs to look elsewhere.


I think it should have been presented not as a remedy but as an upgrade/modification.
Like this he seemed silly and being sold to a completely unnecessary expense.
And even worse if you think that it wasn’t an issue with the intake manifold to begin with, as it had new injectors and all… it was either the ECU, or its wiring, or ignition related.
And many stand alone systems to choose from at a fraction of the cost.

Otherwise it’s not a bad modification if you have £20.000 to burn on top of the £70.000 you’ve put in already, or if you want to make a show on YouTube…
I liked the distributorless ignition though.

Yes, that is nice, and the two Ford V6 coil packs are what the 6l x305 is equipped with by Jaguar.

I really like the distributorless ignition too! But for half the price, mobek gives you all that plus a real wiring harness, plus new injectors, plus AAV delete.

It is so tempting…


Completely unnecessary in my opinion. For the requested outcome of a nice running car, the original system is fine and can be sorted with minimal additional effort and cost to what he’s already done.

The fact that the car was dropping cylinders at temp, is a pretty good indication that something is up with the re-opus, or the ECU communication from a bunk sensor or short.

The car (I believe) was pretty rock solid reliable prior to the rebuild / they had a bunch of new harnesses made, etc., during the rebuild. Very easy to ground source and diag those early systems.

Watching them gut and replace with an entirely new system, that requires dyno tuning and maps, is brutal for a more or less stock car.

It feels like drama created for the internet and to sell stuff.

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Drama sells. HDTV is largely scripted. That program Love it or list it is essentially fake. The majority of houses that they visit are not for sale, and in most cases they have already decided which house they want.
You make money on uTube based on clicks and subscriptions. The more drama, the more clicks. In this case the increased traffic might very well pay for a system that is really not needed, but it builds his followers which is the prime objective.