Paddy_SP Posted May 28, 2014 Share Posted May 28, 2014 I tried posting this in the Discovery forum, but didn't get anywhere - as this is a generic 300Tdi issue, I thought I'd try again here: I had to drive from mid-Devon to Bristol yesterday morning to collect some three-phase cable. Just as I was going over the nasty bit where the M5 curves around the side of what feels like a mini-mountain I had to give it some extra throttle to pass a truck that pulled out in front of me. Instead of the vehicle accelerating, it felt like I'd hit the brakes, and huge amounts of black smoke poured out of the back. Luckily I'd just crested a rise and was able to cruise my way out of trouble on zero throttle, and whilst doing so threaded my way to the inside lane in case an emergency stop was needed - fortunately, it kept going, and I was able to start considering whether it'd make it to the next junction. On light load, the truck seemed OK, so as I only had two junctions to go - and they were close together, I continued on towards my destination. At the next hill though, the problem recurred, and it was so bad that I began to pull over to the hard shoulder. The poor bloke in the tow-truck behind me was completely swamped in black smoke (if it was you, sorry!), and in desperation I worked the throttle in an attempt to see if it made any difference. By then I'd slowed right down, but once again as soon as it was on light load the engine picked up, and I got to the junction without further drama. I collected and paid for my cable, diverted to Bridgewater on the way back where I picked up a Migatronic welder, and by keeping it slow and gentle, made it home. Candidate cuplrits at this stage include an injector failing (but it seemed more aggressive than that) or a fuel pump problem. I'd rather have guidance from someone who had experience of the issue, however, so I'd be most grateful for any suggestions or helpful comments! Vehicle: R reg 300Tdi Disco 1, non-electronic throttle version, EGR blanked off. Quote Link to comment Share on other sites More sharing options...
elbekko Posted May 28, 2014 Share Posted May 28, 2014 Black smoke sounds like lots of unburnt fuel. Maybe the turbo? Quote Link to comment Share on other sites More sharing options...
daveturnbull Posted May 28, 2014 Share Posted May 28, 2014 From you explanation, I would be pointing the finger of blame at the turbo. Quote Link to comment Share on other sites More sharing options...
stripy Posted May 28, 2014 Share Posted May 28, 2014 Check your hoses that go to your turbo and intercooler they may be collapsing. With the bonnet up rev the engine and watch the hoses. Quote Link to comment Share on other sites More sharing options...
Paddy_SP Posted May 28, 2014 Author Share Posted May 28, 2014 Thanks, Chaps - I was wondering if it might be a turbo issue. I've already checked the I/C hoses over (they're not very old), but will do so again. Quote Link to comment Share on other sites More sharing options...
elbekko Posted May 28, 2014 Share Posted May 28, 2014 Check the hose before the turbo too. 1 Quote Link to comment Share on other sites More sharing options...
Steve King Posted May 28, 2014 Share Posted May 28, 2014 Check the hose before the turbo too. Particularly the angled one - it can delaminate internally. Quote Link to comment Share on other sites More sharing options...
Roverdrive Posted May 29, 2014 Share Posted May 29, 2014 If there was no attendant change in noise with the smoking, I would be looking at the turbo hoses rather than the turbo itself. It sounds like the engine is being starved of air at high load demand, causing the excessive smoke. Quote Link to comment Share on other sites More sharing options...
Jamie_grieve Posted May 29, 2014 Share Posted May 29, 2014 +1 for turbo hose. Touch it when the engine's idling and feel for soft spots or just touching it might make it collapse while you're there. The turbo hoses delaminate and boost air gets behind the delamination and blows the inner membrane of the hose up like a balloon blocking the flow of air to the engine. When the engine dies, boost pressure from the turbo dies and this is why it's all good again at idle until it boosts hard again. I remember the first time I had this problem before forums happened and was well impressed at a new unheard of wayI'd foun for a Land Rover to break down. Can you post a follow up so someone doing a search can know what the problem was and how it was resolved. Quote Link to comment Share on other sites More sharing options...
honitonhobbit Posted May 29, 2014 Share Posted May 29, 2014 Yup... By the way that's Court Hill up from J20 to The Split-Level, Wynhol Viaduct, then Casewell Hill down to J19 Quote Link to comment Share on other sites More sharing options...
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