mudmagnet Posted April 7, 2010 Share Posted April 7, 2010 my 300tdi failed the mot for emissions, mot man said try putting a few tins of diesel cleaner through first to see if it cleans things up anyone had any success with any particular brand of diesel cleaner Quote Link to comment Share on other sites More sharing options...
disco_al Posted April 7, 2010 Share Posted April 7, 2010 most garages i know swear by forte products. first thing you should do though is a clean air and fuel filter, add a bottle of diesel stop smoke into the filter, and then a couple of bottles of injector cleaner into the tank (if there is more than 1/2 a tank of diesel in there - if under 1/2 a tank, then 1 will do) Quote Link to comment Share on other sites More sharing options...
Ziggymachine Posted April 7, 2010 Share Posted April 7, 2010 Another trick i dont use on my transit van is...slacken throttle cable off a good few turns, and put a big thick lump of carpet under the rubber mat, it stops them from thrashing the nuts of the engine, its not worked a few times now the rest is just welding!!!! Ziggy Quote Link to comment Share on other sites More sharing options...
Les Henson Posted April 7, 2010 Share Posted April 7, 2010 You can also add 20% cooking oil to the fuel tank. This knocks the emissions down significantly - providing the engine is nice and hot. Les. Quote Link to comment Share on other sites More sharing options...
martinhollings Posted April 7, 2010 Share Posted April 7, 2010 on the way to the retest rev the nuts of it when you get there take the air filter out and make sure the EGR system has been blanked off Quote Link to comment Share on other sites More sharing options...
TheRecklessEngineer Posted April 7, 2010 Share Posted April 7, 2010 Diesels love to be thrashed. Without a good thrashing now and again, you will get a buildup of soot and carbon deposits in the cylinders and injectors. Take it to your nearest A road, 3rd gear, foot to floor and hold it there on the limiter for 10-15 seconds or so. Then do it again. You will probably get clouds of black smoke out the back which will clear as everything unblocks itself. It would also help to put some injector cleaner stuff in the tank. Don't bother with the dosing instructions on the side, just tip the whole tin in. Before you do the above though, do give your engine a check over. Oil/coolant level etc. Quote Link to comment Share on other sites More sharing options...
mudmagnet Posted April 8, 2010 Author Share Posted April 8, 2010 ive put wynns diesel cleaner in the tank changed the air filter going to do the fuel filter and then i will put it back in for a retest Quote Link to comment Share on other sites More sharing options...
disco_al Posted April 9, 2010 Share Posted April 9, 2010 i gave mine the "thrash it clean" treatment last night on the way home, first time got loads of smoke out the back, second time got nothing - so it does work. hardly get anything on startup now either. could be worth trying this one on the way to the test station..... Quote Link to comment Share on other sites More sharing options...
mudmagnet Posted April 9, 2010 Author Share Posted April 9, 2010 all ok now thanks car has a new mot Quote Link to comment Share on other sites More sharing options...
M&S Posted April 9, 2010 Share Posted April 9, 2010 Superb Quote Link to comment Share on other sites More sharing options...
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