Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72788
ENGINE SYSTEM FAULT under full throttle.
Been getting this fault a few times under full throttle, also power is way down (remapped) and mpg is down by between 10% - 20%, getting 25mpg when driving at steady 70mph, would normally be 30mpg ish. When bong sounds "i" appears with ENGINE SYSTEM FAULT, car goes into limp home mode and have to either pull over & restart or do a rolling restart, i clears but power is still down. Mostly happens going up hills, last occurred when giving it extra throttle (to get round something) but in cruise control, dropped down to cruise level & held it. Previously with no cc it lost power & slowed down. Was carrying 350kg of wheels & tyres but no seats (commercial load deck) but was doing it with nothing in the back.
Did think EGRs but these were blanked off few months ago (06 Auto, EuroIII). Had this problem in the summer, thought changing MAF sensor fixed it and had no issues after, esp on Tunisia trip where lots of full throttle driving. Just changed fuel filter which is what I thought it was but this didn't fix the issue, also new air filter.
Any thoughts peeps, getting a bit annoyed with it and need to get it sorted as a matter of urgency but reluctant to throw it at a garage without understanding what may be the cause.
TIA
Derek
PS just had a chin wag with SWMBO and decrease in mpg might be a red herring as when drinking the fuel it has been when battling a wicked head wind. Last trip was 800 miles and got 28.6mpg (actual) with most of that being at 70mph.
4th Nov 2010 6:30 pm
Discoed
Member Since: 16 Jun 2010
Location: Yorkshire
Posts: 1020
I have had a similar issue on two occasions. Both times I was towing a caravan uphill on a dual carriageway when the 'engine system fault' message came on.
After stopping from limp mode I turned off, waited then fired up again and all was OK. I have not blanked my EGR (05MY) but that is on the list of jobs to do. I was hoping it may stop this annoyance.
Otherwise no problems over the first 5k of ownership.
I posted on the other Engine Fault thread before I saw this one
Check the intercooler - changing mine (I'm going to soak the old one in a water bath to try and get the mud out from between the fins- 2 months should be enough ) the other week has improved fuel consumption by about 5-10% and its not faulted since - though mine only faulted when the ambient was above about 21'C and I'd been on a long motorway run.
As it is hard to see, one way to check for good flow, is to use water - take off the top cowl over the fan, and direct water with a hose through the IC. I used a bit of 15mm copper, with a 90deg bend into a 15-8mm reducer so that I could direct the water straight onto the back of the coil. You should see lots of water flowing through - unlike mine that just filled up the cowl Mark.
2006, D3 SE Auto - gone but not forgotten.
2014 BMW 530d M Sport Tourer.
1977 Triumph Spitfire 1500
_________________________________________________
Disco Picture Website Here
4th Nov 2010 7:22 pm
Mr Fudge
Member Since: 01 Oct 2009
Location: Northampton
Posts: 106
Mine did exactly that - engine went into limp mode at full throttle uphill, slightly scary when joining the M40 uphill with a trailer
Within three days it had died - turned out to be fuel pump failure
5th Nov 2010 9:46 pm
DiscoDunc
Member Since: 08 May 2006
Location: Bristol
Posts: 16390
DSL, this sounds very similar to the symptoms I had on way back from Aviemore last new year towing the caravan
sudden loss of power. stopped and restarted but still a bit of power loss.
Checked faultcodes with Faultmate and was showing "Turbo Overboost" error. I reset the codes and havnt had the fault since !!. it wasnt the intercooler hose, that was OK when TFC did the health check.
http://www.disco3.co.uk/forum/topic44384.h...BoverboostDuncan
-----------------------------------------------------
If I'd known I was going to be so thirsty this morning I'd have drunk more beer last night.
FFRR Autobiography 4.4 SDV8 MY17
D4 HSE MY13 SOLD
FFRR 3.6 Vogue TDV8 SOLD
D4 HSE MY10 SOLD
D4 SE TECH MY15 SOLD
D4 XS MY12 SOLD
D4 HSE MY10 SOLD
D3 HSE MY06 - Re-Cycled Worldwide
5th Nov 2010 9:53 pm
The Transformer
Member Since: 22 Jan 2010
Location: Leicestershire
Posts: 1791
Got to be the TURBO
5th Nov 2010 10:02 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72788
Wish it was, I can diagnose that!! DD, seems quite common for this to occur then no recurrences, mine has happened 4 times this week. Will sort out getting codes deleted.
5th Nov 2010 10:05 pm
PaulP
Member Since: 04 May 2007
Location: Barcelona
Posts: 4317
Del, I know you're getting a bit desperate so thought I'd throw in a long shot....
What about the brake pedal switch? These are known for failing and can cause funny problems....
Probably not the actual fault, but it's a cheap enough thing to try 2006 Discovery 3 TDV6 SE AutoBuckingham Blue 2007 Golf GT DSG
5th Nov 2010 10:43 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72788
Will have a look at brake lights as well.
5th Nov 2010 10:53 pm
PaulP
Member Since: 04 May 2007
Location: Barcelona
Posts: 4317
Brake lights? Surely that would have been the first thing you looked at 2006 Discovery 3 TDV6 SE AutoBuckingham Blue 2007 Golf GT DSG
5th Nov 2010 10:54 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72788
forgot!
5th Nov 2010 10:57 pm
PaulP
Member Since: 04 May 2007
Location: Barcelona
Posts: 4317
2006 Discovery 3 TDV6 SE AutoBuckingham Blue 2007 Golf GT DSG
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
) the other week has improved fuel consumption by about 5-10% and its not faulted since - though mine only faulted when the ambient was above about 21'C and I'd been on a long motorway run.
