Intermittent Loss of Power. Jaguar S-Type Diesel Sport

Intermittent Loss of Power. Jaguar S-Type Diesel Sport

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Harvest

Original Poster:

11 posts

138 months

Monday 23rd March 2015
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Hope someone can advise.

I have recently purchased a 2004 S-Type 2.7d Sport (the one with the exhausts bent down facing the road) with 161,000 miles on the clock.

I have an intermittent fault developing and would like some advice as to what may be wrong before I visit a dealer.

Symptoms are as follows:

Most of the time, having started the engine and accelerating away from stationary the car performs as it should with good power. However, sometimes the car holds back and wont accelerate at all, being lucky to reach 30mph. It feels similar to driving a car which has a speed limiter fitted and you try to go above the limit.

If I pull over and turn the engine off and turn on again the fault clears. At no time is there any fault code displayed.

If however, instead of doing the above procedure, I kick down the accelerator and hold the pedal there, after a delay of at least 5-6 seconds, acceleration will suddenly kick in but in the process smoke is seen to come out of the exhaust when normally there is none.

Today I also noticed that although the car started out ok, when I pulled away from traffic lights on the same journey the fault came back.

Here's hoping someone can advise.

littleredrooster

5,537 posts

196 months

Monday 23rd March 2015
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My dash display says 'Restricted Performance' when it does this and I think it's to do with low battery voltage, as it always happens after a succession of very short journeys. I really should replace the battery at some point!

LFB531

1,233 posts

158 months

Wednesday 25th March 2015
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Isn't that the same 2.7V6 as in the Range Rover of the same vintage? If so, I had the same symptoms and it was an EGR valve out. Had both blanked off which you can in an up to '07 RRS without the ECU having a head-fit.

As for the battery, S Types do not like old ones. I've had two, currently on an STR and battery was first thing to be ditched.


Harvest

Original Poster:

11 posts

138 months

Thursday 26th March 2015
quotequote all
Thanks for your suggestions

Mopar440

410 posts

112 months

Thursday 26th March 2015
quotequote all
Harvest said:
At no time is there any fault code displayed.

Have you actually plugged in fault code reader? And there was "no fault code displayed"?


Harvest

Original Poster:

11 posts

138 months

Thursday 26th March 2015
quotequote all
Mopar440 said:
Have you actually plugged in fault code reader? And there was "no fault code displayed"?
No.I'm referring to the dashboard warning display

Muzwald

1 posts

109 months

Friday 27th March 2015
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Read this and need some help. I also have an S Type 2.7 twin turbo Diesel on an 05 plate 95k miles. Twice in the last 600 miles without warning, I loose all compression. The engine revs freely to just under 3000, and will eventually get up to about 50 / 60 mph. but it feels like a limp home mode, no dash warning lights of any kind, just no power and any use of the throttle results in loads of black smoke from both exhausts. After 20 miles or so without warnings seems to clear and compression returns. Thoughts? Had codes read and there were loads of old ones, which I had cleared, but two of note were a maf error and a EGR error. Worried I might have a turbo issue or gearbox going, but could this just be EGR? No smoke once compression returns. Seems to happen after being in long queues or slow moving traffic. My garage has cleared the codes and wants it back once it has happened again to see if they can decide between EGR or MAF. ????

LFB531

1,233 posts

158 months

Friday 27th March 2015
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I've just had a look at the paperwork I got with my EGR blanking kit and it is the same for the S type as the Range Rover Sport, apparently pre '07 is ok for the ECU. My local garage replaced both EGRs in an hour with blanks for less than £100 including the kit price. No noticeable difference in the way it runs, I had the V6 re-mapped shortly afterwards and the total cost of the blanks, labour and re- map was not far off the the cost of swapping the two EGRs with new ones.

Harvest

Original Poster:

11 posts

138 months

Friday 27th March 2015
quotequote all
LFB531 said:
I've just had a look at the paperwork I got with my EGR blanking kit and it is the same for the S type as the Range Rover Sport, apparently pre '07 is ok for the ECU. My local garage replaced both EGRs in an hour with blanks for less than £100 including the kit price. No noticeable difference in the way it runs, I had the V6 re-mapped shortly afterwards and the total cost of the blanks, labour and re- map was not far off the the cost of swapping the two EGRs with new ones.
Any issue with blanking off EGRs and passing MOT emissions test?

LFB531

1,233 posts

158 months

Friday 27th March 2015
quotequote all
No, MoT fine, the garage that blanked it also does the annual test as well and are pretty hot on the rules and regs as I know to my cost!

Harvest

Original Poster:

11 posts

138 months

Saturday 28th March 2015
quotequote all
LFB531 said:
No, MoT fine, the garage that blanked it also does the annual test as well and are pretty hot on the rules and regs as I know to my cost!
Thank You. I'll need to diagnose if it is the EGRs then I'll consider my options.