SD60659 Posted September 5, 2016 Share Posted September 5, 2016 Hi guys, Hope this is in the right section. Just signed up because, frankly, I am rather stuck! I work as a contractor for Western Power and we have Defenders. Our 08 plate 110 is playing up. Starts, runs, drives. For a bit. Then the engine shuts down to something like 500RPM. No throttle response during this fault. Switch off, restart and all is well again - until the next time! Had a very good mechanic friend of mine plug it in and it showed Turbo Underboost and EGR faults. HOWEVER, now it's showing no codes and the problem is still present. We didn't clear the codes the last time and now they've vanished. It will also rev its guts out any time it feels like it, from idle. A blip on the throttle usually cures that but it's still annoying. Being a "Special Vehicles" thing built for utility companies it's fully loaded with inverters and gadgets, winches, 100VAC etc including a digital throttle control in the back of the vehicle (only mentioning as I thought maybe it would help) She's in the garage as I write this, mechanic (very good mechanic too) is leaning towards EGR valve. Any thoughts? Any help much appreciated! Quote Link to comment Share on other sites More sharing options...
dirtyninety Posted September 5, 2016 Share Posted September 5, 2016 Decent diagnostics should be able to operate the EGR valve actuator. Id be looking suspiciously at the digital throttle control. Quote Link to comment Share on other sites More sharing options...
Daan Posted September 5, 2016 Share Posted September 5, 2016 Someone I know had a cracked fuel filter housing, which let in air in the system resulting in the engine regularly shutting down. Daan Quote Link to comment Share on other sites More sharing options...
SD60659 Posted September 5, 2016 Author Share Posted September 5, 2016 Thanks for the replies, tomorrow we will disconnect the EGR (this should trigger a fault code) and drive it around a bit. I've read that disconnecting the MAF sensor effectively blanks off the EGR electronically, does this sound right or a bit of nonsense? If that doesn't have some effect then yes, could be the rear mounted throttle control :/ I hope not though because we need that. Then again we also need the engine to run! Quote Link to comment Share on other sites More sharing options...
SD60659 Posted September 6, 2016 Author Share Posted September 6, 2016 Just as a quick update in case anyone else has the same trouble.... eliminated so far - EGR MAF Secondary Throttle Control Unit Filter Head/Housing looks fine Moving on to Crank sensor and cam sensor... Quote Link to comment Share on other sites More sharing options...
Happyoldgit Posted September 6, 2016 Share Posted September 6, 2016 Cam or crank sensor would be my first port of call but do double check the battery terminal clamps as well as others have reported odd faults only to find the clamps were loose, also check all the relays mounted in the drivers seatbox for security and good connections. You could move onto the instrument cluster then the 10AS alarm unit behind the dash on the right side. Quote Link to comment Share on other sites More sharing options...
SD60659 Posted September 6, 2016 Author Share Posted September 6, 2016 Cam or crank sensor would be my first port of call but do double check the battery terminal clamps as well as others have reported odd faults only to find the clamps were loose, also check all the relays mounted in the drivers seatbox for security and good connections. You could move onto the instrument cluster then the 10AS alarm unit behind the dash on the right side. Only irritation from my end with it being cam or crank position sensor is it should produce a fault code but it isn't :/ I've heard about relay problems and haven't checked there yet. Probably should before anything more serious! Battery connections.... please don't tell me it's spent 2 days under inspection for that!! That's now job number one in the morning! And if it does turn out to be that... I will NEVER admit it! EVER!! Quote Link to comment Share on other sites More sharing options...
SD60659 Posted September 7, 2016 Author Share Posted September 7, 2016 Another update... All battery connections/fuses/relays are sound and have no identifiable faults. Gave a full and thorough service (just cos) and the fuel filter contained no nasty surprises, a bit of cack but nothing unusual. Had extra super duper diagnostics brought in, showed two faults. Immobiliser error and something about fuel pressure. Cleared faults, engine ran for 20 mins and didn't stall, but that's nothing to go by as the fault is totally random. There is now much head scratching and the words 'pump' and 'knackered' are being mentioned... Quote Link to comment Share on other sites More sharing options...
PhantomSVE Posted September 9, 2016 Share Posted September 9, 2016 Hello, Sorry to see you having so many problems. I need to clarify one thing: Does the engine shut down completely or just drops to a very low idle ??? Phantom Quote Link to comment Share on other sites More sharing options...
Zebedee321 Posted November 17, 2018 Share Posted November 17, 2018 Sorry to resurrect an old thread but I am having the same issues and my revs drop to a low idle, even if I keep the throttle position the same. Any ideas? Quote Link to comment Share on other sites More sharing options...
Scotts90 Posted November 17, 2018 Share Posted November 17, 2018 A neighbour of mine is having similar issues with his tdci. Loads of algae/sludge in the tank and fuel lines were found. It’s in for it’s 3rd session of flushing. Seems to affect the tdci more than the td5. Quote Link to comment Share on other sites More sharing options...
Lightning Posted November 18, 2018 Share Posted November 18, 2018 (edited) Well, the O/P hasn’t been back since Sept 2016 so we will never find out what was wrong with his, or whether he fixed it. Edited November 18, 2018 by Lightning Quote Link to comment Share on other sites More sharing options...
PAC110 Posted February 2, 2021 Share Posted February 2, 2021 Hi, hoping someone can help. Having exactly the same problem, occasionally the revs will just drop to 500rpm with no response from the pedal, also occasional complete lack of power for maybe 1/2 a second. The lack of response from the pedal makes me think it probably is electrical, rather than any fuel starvation issue, there is no in-between situation, either 100% or 0%, but gradient seems to be a contributing factor. No registered faults, and putting a new EGR valve on (which was previously throwing a fault), hasn't cured it. Local specialist has been unable to diagnose, but seems from this thread that its not unheard of. Becoming a bit of a liability and have been stranded in the middle of a busy junction for a few seconds. Quote Link to comment Share on other sites More sharing options...
mrsmiles Posted June 8, 2021 Share Posted June 8, 2021 hi I've got a 2010 l316 defender that does something similar ,stalls quite a lot now no error codes when scanned has about 30 000 km . I have to wait a while for it to cool before i drive for about 1 km . Please help Quote Link to comment Share on other sites More sharing options...
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