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Discussion Starter · #1 ·
Hi All
I have been using my car a lot more and doing longer journeys. I have noticed, and its becoming annoying, that it feels like its dragging its heels/brakes applied when driving. I have found that if its taken up to say 50mph and no gas is applied, this is when it feels like its braking. I have felt the brakes front and rear and they do not feel excessively hot. on a recent return trip to Cumbria from Southend on Sea I averaged nearly 34mpg which makes me think it isn't a brake or an engine problem (steady 75 mph on the motorway).
Its now covered 69000 miles from new (S type/auto/3.0 v6 petrol).

I have noted a very occasional and momentary 'sigh' noise comping from the rear of the car.

Any thoughts??

Thanks

Rob
 

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check to see if the electronic park brake is releasing correctly. I had a similar problem with mine because the workshop that had replaced the rear brake shoes had fitted them dry. We took the pads out and put a litle bit of ceramic grease where the pads rub on the caliper.

The brake now functions perfectly and releases very quickly.
 

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Discussion Starter · #4 ·
Thanks for your replies.
I've checked brakes - no problems.
I took the car to a transmission specialist today as I was concerned whether I had a gearbox/transmission problem. 6 gearbox fault codes were highlighted and cleared. I've also had the gearbox reprogrammed too. Touch wood, its driving like a dream again now....One of faults highlighted though was to do with 2 to 3 gear change which I have been told to keep a watch on.

These cars are so electrically complex now there appears nothing that the average DIY'er can do in the way of repairs/maintenance.

Regards

Rob
 

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Treat yourself to a mongoose clone or an elm 327 and go this site to download a copy workshop manual
Jagrepair.com
 

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Has the gearbox oil ever been changed.
Although they did say that gearboxes were sealed for life this is not the case.
 

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Discussion Starter · #11 ·
The fault has now reappeared and worse than ever. I have connected my ELM327 and received a pending P1111 fault code (having looked on the web it appears that this is a common code to see for a Jaguar?). I have driving back and forth from Southend to Ulverston (Cumbria) and get around 33mpg. However, driving home on Friday I have real issues with acceleration and this feeling of braking (engine braking???) and only getting about 27mpg so something is not right. It actually was hard work to drive so I used the cruise control as much as I could keep speed down between 60+ mph.
I am going to contact the Bosch centre that reprogrammed my gearbox to discuss with them. I feel at a loss and fed up with the car now!
 

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The code p1111 means that the car has completed all of the monitered checks for the emmisions. Here in Germany and in America. They check to see if this code is there before they do the emmisions test because some people clear the engine light and try to get the car through the test.

So dont worry about this code.
 

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I am also a bit confussed to why a bosch center reprogrammed the gearbox because here they will only work on German cars such as BMW. I did not that they would work on a Jaguar that uses different programs to work on the cars. Are they able to work directely on the Gearbox?

To be able to read the codes from the gearbox you would need a jlr mongoose. The clones are cheap.
 

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Discussion Starter · #14 ·
I am also a bit confussed to why a bosch center reprogrammed the gearbox because here they will only work on German cars such as BMW. I did not that they would work on a Jaguar that uses different programs to work on the cars. Are they able to work directely on the Gearbox?

To be able to read the codes from the gearbox you would need a jlr mongoose. The clones are cheap.
Thanks.
Can you recommend a suitable (and cheap) mongoose clone?
 

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The fault has now reappeared and worse than ever. I have connected my ELM327 and received a pending P1111 fault code (having looked on the web it appears that this is a common code to see for a Jaguar?). I have driving back and forth from Southend to Ulverston (Cumbria) and get around 33mpg. However, driving home on Friday I have real issues with acceleration and this feeling of braking (engine braking???) and only getting about 27mpg so something is not right. It actually was hard work to drive so I used the cruise control as much as I could keep speed down between 60+ mph.
I am going to contact the Bosch centre that reprogrammed my gearbox to discuss with them. I feel at a loss and fed up with the car now!
.
I think your car's going into what's called Limp Mode, Restricted Performance mode, to get you home when the car is sick by minimising stress to the engine.

It prevents you over revving and stops the gearbox changing into high gear.

Sometimes when it's a temporary condition that's causing the problem you can restore normality by stopping, switching off the engine and restarting.

Have a go and tell us what you notice.

It can be caused by kicking down sometimes because the accelerator pedal limits have not been set, splits or other leaks in the air intake hoses, dirty or faulty MAFs, dirty or faulty MAP, and several other more technical reasons.

Air leaks can be found with a smoke tester.

We need CODES!

It is worthwhile doing what's called a "Hard Reset" of the car electronics, then there are some resets in our S Type Stickies subforum you should do after the hard reset, have a look at them.

.
 

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Another problem that could well match your symptoms of lack of power, and one which often does not throw any codes early on, is one or more failing coils, which is not uncommon on the V6 petrol cars. Especially if the scuttle drains are blocked, rainwater overflows onto the engine and finds its way into coils and shortens their life.
 

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Discussion Starter · #18 ·
Hi
The Elm327 is indicating no fault codes. At 70mph it was 2000rpm. The car became more 'resistive' the harder I accelerated (although I don't consider myself a boy racer) with the fuel consumption dropping off (6mpg less than when i did the same journey 2 weeks ago).
I have had new tyres on the rear, Good Year efficient grip 235/55 w17's, although I cannot see that the problem is due to these.
 
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