Restricted Performance

[RichardSEL]

Miles? Has your DPF been changed out?
Any other icon seen on dash?
Do you have a code reader? Your previous fault may have been stored even though the RP icon's out

Where are you? I'm south east London

[Westfield]

Apologies for the late reply.
The drivers side inlet manifold has now been replaced which incorporates the cam cover all in one moulding.
Problem solved but I did have to have a DPF clean performed where they injected some form of cleaner into it and now it all runs like new.
One interesting thing was when I collected the inlet manifold from Jaguar I asked if this was a common fault, the reply was 'I always keep one in stock'

[Mottok76]

Hi, first post here and unfortunately restricted performance related on my 2010 Jaguar XF 3.0 diesel. My issue looks similar to those in this post, wondering what you think? Thanks.

[Pwiddy]

I have a 2010 XF 3.0 Diesel with 75000 miles. Got the dreaded restricted performance mode and it cleared at first but then became a hard fault. Had a company run an analyser and they reckoned the 2nd Turbo was shot, or the DPF needed replacing and the car needed £2K spending on it!!! Bought an iCarsoft i930 analyser off Ebay for £90 and ran my own diagnostic test. Coupled with research on this fantastic site
the fault was this turbo actuator valve (as posted by Kev Noble originally) being seized solid. Cleaned it up and car now back to its lovely best. Just got to sort a few minor rear door lock faults now which Jag want £450 to fix!!

[Mottok76]

Hi, can anyone help me with the post I sent a while back? I am still trying to get it sorted. Have changed the turbo shut off valve, had a smoke test done (all fine apparently), had the compressor shut off valve tested and the turbo vacuum solenoid changed. Still get the same two errors as above post and it is really annoying me now! Normally you can go over 3k rpm now and again and it's fine but if you received over 3k all the way past about 70+ it will eventually go in to limp mode. Desperate for help thanks.

[J44EAG]

Sometimes you have to tackle these issues from a rather diverse angle which on the face of it might be seemingly unrelated to the issue itself.

If the car were mine, I would in the first instance be trying a simple solution and horseing through a load of DPF cleaner through the fuel system. I`m not saying this will work but perhaps try some DPF cleaning chemical. Halfords sell this jollop.https://www.google.com/aclk?sa=l&ai=DCh ... LcC&adurl=

I would have also through some consultation with these people might be beneficial.
https://www.google.com/aclk?sa=l&ai=DCh ... EAE&adurl=

Just my take on the matter. Hope it gives some ideas if nothing else.

Mike K

[ibramguirguis174]

Hi guys,

How anyone of you could keep up with the oil rise of the 2,7 engines ? Does the problem remain also with the 3.0l ?

Does anyone thought of changing the block ?

I've the 2,7D and just concerned what if I missed and my crank shaft broke!! What engine will fit in then ?

Many thanks

[J44EAG]

Oil dilution and raised sump levels can occur in any diesel engine if other issues are present to cause the condition. Short journeys and fuel wash into the sump is the biggest issue which can lead to the engine running un-controlably on its own high level diluted engine oil. Weekly engine oil level checking is a wise precaution.

Many diesel engines operate with a regenerative program designed to clear the particulate filters as a burn off procedure. Over fueling is part of that process. Heavy smoking at the exhaust may signify a regeneration is in progress. This process should be left to complete preferably by driving the car on a motorway until it is clear that the process has completed. Unfortunately many owners do not recognize when regeneration is taking place and could well continue to use the car for short journeys. This will lead to rising sump oil levels with high dilution levels occurring. Best advice must be to not use the 2.7 on short journeys. The 3.0 or indeed any other diesel vehicle used for short journeys is at risk. If short journeys are performed, then extra special level checking and more regular oil changing needs to occur.

I run a 1.6Hdi diesel in a Peugot van. Dependent on usage, I`ll change the oil in that van every 5-7k miles to keep lubrication oil at a reasonable quality and to rid the van of any dilution contaminates. No regime is perfect but this course of action goes someway to addressing diesel issues.

Mike K

[richardhilton77146]

I’ve now got a slight variation on this. Can anyone offer any pointers?

XF 3.0d, 145k miles, serviced 2 weeks ago, intercooler changed about 12 months ago, car used for 100 miles per day commute on dual carriageways

Restricted performance warning came on about a week ago, EGR valve checked and found to be ok. Lubricated anyway to be sure. MAP sensor fault detected so the sensor was replaced but the warning still comes up. Not sure what warnings now appear in the computer as the garage has the car but couldn’t look at it straight away.

At the start it was just the red restricted performance warning but the last time I drove it the yellow engine warning light also appeared. Came on for a few mins then went off. 10 mins later it was back on.

Any ideas of what to try next?

It’s a local garage and they are genuine guys who are really keen to fix the problem and not just replace parts randomly.

Thanks

Rich

[JamesR]

Hi, can anyone help me with the post I sent a while back? I am still trying to get it sorted. Have changed the turbo shut off valve, had a smoke test done (all fine apparently), had the compressor shut off valve tested and the turbo vacuum solenoid changed. Still get the same two errors as above post and it is really annoying me now! Normally you can go over 3k rpm now and again and it's fine but if you received over 3k all the way past about 70+ it will eventually go in to limp mode. Desperate for help thanks.

Hi Mottock76,

Did you ever get to the bottom of your issue?

Thanks

[Zennan101]

My turn for ‘Restricted Performance’. Warning came on on a fast uphill climb. Only noticeable difference at the time was an unwillingness to press on. Left overnight the RP warning had cleared. I only have a basic code reader which recorded P1247 which points to several suspects:-
Damaged MAP hose
Low turbo boost
Intake manifold or crossover tube hose leaks
Faulty MAP sensor
Faulty Powertrain Control Module (PCM)
A couple of questions for those who have trodden this path before me.
1) Will a more sophisticated code reader narrow the problem down further?
and 2) Which order would you recommend I begin the process of pin pointing the actual fault which I assume will recur.
If it helps my XF has 79k and is only 3k past it’s last service. I have never seen a DPF warning and only use Shell Nitro so (in theory) the internals should be reasonably clean........

[J44EAG]

In my experience, Rod, I`ve found small vac or pressure pipes to disintegrate, split or expand at around 80k miles on many cars. Lengths of the small 1/8"/3mm ID pipe can be sourced from your Main Dealer, local motor accessory shop or indeed from the ready pack rack at Halfords. Their small bore pipe is thicker than OE Jaguar pipe and feels rather more robust. Worth checking atop the engine for any small bore rubber pipes and worth examining for defects before getting into the issue more deeply. If you find these pipes to be defective, then replacement is unlikely to cost more than a tenner. Best of luck.

Mike K

[Zennan101]

Thanks Mike, I’ll start there and see where it gets me.
What about the other question.Will a better scanner get me more detail?
Rod

[J44EAG]

I can`t remember if you have an iCarsoft930i Jag dedicated diagnostic unit, Rod. If you have then that is probably more than good enough. One of the ELM327 bluetooth units plus the cheap Torque Pro smart phone units is also likely to be broadly equivalent and effective. Most of these units at that level should be good enough to tackle the majority of restricted performance issues. The more expensive diagnostic offerings such as the LR11 or Foxwell do more towards park brake resets, suspension height adjustments etc. Personally, I don`t think you would have much more to gain by an upgrade for this problem. I`ve often found a good look around an engine will often reveal some small defect like an air leak usually caused by a duff small bore rotted rubber pipe.

As we always say, start with the basics and go from there.

Mike