wack61 Posted April 22, 2011 Share Posted April 22, 2011 Whenever I start my 300TDi defender I get a puff of black smoke, it doesn't smoke after this but does it every time regardless of how long it's been stood, 30 seconds, 5 minutes or 5 hours A mechanic said it's normal as they over fuel on start up to get them going and they all do it, is that right Had it MOT'd recently and the tester couldn't believe how low the emissions were Quote Link to comment Share on other sites More sharing options...
Jon W Posted April 22, 2011 Share Posted April 22, 2011 Yup its normal they all do that, so dont worry about it. Jon Quote Link to comment Share on other sites More sharing options...
steve200TDi Posted April 22, 2011 Share Posted April 22, 2011 It's just the unburnted fuel in the system. So when you start up the exhaust from the new combustion cycles just push all of this out which is the unburned stuff, aka black smoke! Steve Quote Link to comment Share on other sites More sharing options...
wack61 Posted April 22, 2011 Author Share Posted April 22, 2011 Thanks for the replies, I've learned to check the N/S mirror before starting it after giving a few pedestrians cancer the first few days I had it. Quote Link to comment Share on other sites More sharing options...
berti1554 Posted April 23, 2011 Share Posted April 23, 2011 It's a mechanical controlled injection system. It can not control injection quantity like an engine w/ an ECU. Therefore it's over fueling at the low revs during cranking. Mine does it too, no reason for any concern Quote Link to comment Share on other sites More sharing options...
PGM316 Posted April 23, 2011 Share Posted April 23, 2011 Thats a relief, I had wondered about the cloud of smoke, doesn't help with the 4x4 environmental image... Quote Link to comment Share on other sites More sharing options...
Jimmy Two-Jacks Posted April 24, 2011 Share Posted April 24, 2011 Thats a relief, I had wondered about the cloud of smoke, doesn't help with the 4x4 environmental image... My 200tdi does that and it worried me to start with but like they say its a mechanical pump thing. Quote Link to comment Share on other sites More sharing options...
inaine Posted April 24, 2011 Share Posted April 24, 2011 it's knackered! i'l give you £250 if you deliver Quote Link to comment Share on other sites More sharing options...
PGM316 Posted April 24, 2011 Share Posted April 24, 2011 it's knackered! i'l give you £250 if you deliver Its ok, we have We Buy Any Car for that Quote Link to comment Share on other sites More sharing options...
Phillis Posted April 24, 2011 Share Posted April 24, 2011 not for defenders Quote Link to comment Share on other sites More sharing options...
tweetyduck Posted April 25, 2011 Share Posted April 25, 2011 So is that "we buy almost any car" ? Its actully satisfying to see a puff a black smoke and then nothing else. If you get a puff of black and then clouds of something else,,,get worried. Quote Link to comment Share on other sites More sharing options...
dantd5 Posted April 26, 2011 Share Posted April 26, 2011 I did worry for that a lot.(One of the to do's though) A pedestrian going behind me gave me the look .... . I burried face and ignored her direction. Sooty Lenoir.... Quote Link to comment Share on other sites More sharing options...
wack61 Posted April 28, 2011 Author Share Posted April 28, 2011 it's knackered! i'l give you £250 if you deliver If only you weren't so far away Quote Link to comment Share on other sites More sharing options...
lxtechman Posted November 15, 2014 Share Posted November 15, 2014 Evening All, I Had This Non Worrying event for ages until today. For ages Its always puffed and started on the first 1/4 turn of the Starter Motor. Did It as ever thursday Morning as i took it down for MOT. Get it Back today, No Puff of Smoke, Took 2 or 3 turns of the Starter Motor to start up. Then It wouldnt pull and or just tick over and not accelerate. What has the Garage Likely to have done & Why and how do i put it back to how it was on Thursday. Thanks In Advance Nick PS In relation to previous Post, Why would the Garage have done anything to the Defender other than MOT Works Required (Welding) and could the works have affected the Systems ?? (Fuel Return Pipes on the side where the welding and waxoling was Done Could they have been damaged and would it affect the Starting/ running pulling etc not that i can see any issues. Thanks Nick Quote Link to comment Share on other sites More sharing options...
tweetyduck Posted November 15, 2014 Share Posted November 15, 2014 They should not have touched anything on the MOT.... Yes, if the fuel pipes, (plastic) have been slightly melted then the flow could be poor resulting in what you say. Fuel needs at least 6mm to work in a 300Tdi (IIRC). I;ve seen a 3mm stop the vehicle starting and running. So 4mm may generate a poor start and then crappy power. Its just not getting fuel. In the case i mentione they changed a banjo on the fuel filter for one from and different car and the hole in it was 3mm and not 6mm and it took hours to figure out that is just a flow thing. Porr starting anf rough running and certainly no power. You may have answered your own questions. I'd bee looking at fuel starvation. (if not the case then Turbo) Lot of typos but you get the drift. Feed fuel direclty into the filter from a can via a pipe or onto the pump to check its not the chassis pipes....should be esay to do with a length of hose and a bucket of diesel and a few pipe clips. Quote Link to comment Share on other sites More sharing options...
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