Jaguar XF Ambient Temperature reads 80 Degree C!

Hi Maca4,
Just been back at Programmer tonight, He hooked it back up to laptop & Codereaders and finally accepted that it Was caused by the re-map! So Fault found, But not solved...
There were no new fault codes on engine listed so that's a slight bonus as well.
Well known company, well written software! I will not Name & Shame until this is sorted first...
He said that he had seen this problem once before a while back, and is either going to re-write software & if that fails will return to standard, Which I REALLY do not want as I've got used to the extra horses, but more importantly seeing 50+MPG :-D as compared to only around 40-43 before!!!
Decent Mapping companies at decent prices seem to be in short supply here in S.W. Scotland...Bit of a lucky dip!
Cheers, will update when sorted...

Maca4 said:

TBH I see no difference in fuel consumption at all after the remap if anything I'm using more as I tend to drive abit faster and harder and I'm thinking of having it reversed as the novelty is Waring off.

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Honestly Maca4?
I was a bit fed up with the poor MPG and thought a re-map would help improve it a bit while adding a few more horses at the same time.
I will need to wait until the new map is done then keep a close eye on it.
Previously I had a 1.6TDCI Focus to which I fitted a tuning box, it gave me an extra 25-30 BHP and when driving normally I could get around 10% more MPG (measured miles per tank and not going by dash read-out as the box adds additional fuel without the computer knowing). Was hoping a re-map to the XF would have the same result but doing a proper job rather than just over-fuelling with a tuning box.
Also interesting to hear Glenno say "The remaps likely thrown out the accuracy of the onboard computer." as I thought that a re-map would keep everything proper as it should be or |I would have saved myself a lot of trouble and just
bought a tuning box!
Either way still after 2 years I still love my Jag....Just wish it wasn't so thirsty...:-D

Ok Guys, Update time.
The extra power was fantastic especially as it was delivered between 2-3K revs just where you need it for overtaking...:-D
The difference was far better than I expected for a 20% increase in power, it was like night and day!

I took it easy for a week just so I could see how much the MPG had improved and the trip computer would show 50-52 for a run and 44-48 on my daily commute, so well impressed. :-D
BUT I also noted that the fuel gauge was not agreeing with this so I decided to re-fill and do a proper check. Trip was showing average of 44.3 MPG for over 350 miles, so I duly filled up and done the calculations which turned out to be SHOCKING... 33.2 MPG.:shock: So by taking it easy I was now 10% WORSE of than my "normal driving" before the re-map!!!

It was at this point I had had enough, called my man and he said that company would re-do a New Map for me as they had "occasionally" had a problem with an XF.
I politely Declined his offer because if their software was screwing up my Temps and saying it was 80'C thus totally confusing my Climate Control, showing me a 50+ MPG when in fact it was over 10 less, then what else was being messed up that I did not know about?
In all Fairness the lad agreed with me and I had the Standard Map re-instated, with a Full Refund I might add, so not all bad, despite three 100 mile round trips! (1 for map, 1 for computer checks to see if that would fix problems, then 1 to return to normal state).

My only complaint now is my pride and joy now feels Sluggish with ONLY 237 BHP, but on the up-side I am now getting my usual 37MPG average...(though I much preferred seeing 50 mpg. :twisted:...)

Maca4 said:

so was this a big remap company ?

I am not expecting you to name them as they have been pretty good returning it back to stock and money back but just wondered if it was one of the big players as mine was so have the remap written specifically for my car make and model.

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Hi Maca4,
It was a franchise agent for Regal Tuning in York...
The websites seemed spot on, they seemed to know what they were talking about etc, etc.
The agent was spot on, it actually cost him money because he only does the mapping. He pays a local garage to remove the ECU and he maps it.
So it was removed the 1st time to re-map and then the second time for it to be returned to Stock map, so he paid the garage twice while refunding me in Total...He was a top lad to be honest.
I suppose he can only use what Regal supply him with!
He said Regal told him they "Occasionally" have a problem with Jaguar 3.0D...
You know what they say, "if it seems too good to be true, then it usually is" and at £220 it was very cheap....:-D ..But I would still have thought it would work ok as they are bound to have done loads of these by now.
How much out of interest did yours cost, no point in saying where as it will be too far to travel for me...
I was also quoted £320, £350 and £395 by others in Central Scotland, but chose the one I did as closest to me as well as cheapest...
That many to choose from I suppose you pays yer money and takes yer chances.....