Tom bell Posted December 22, 2007 Share Posted December 22, 2007 Hi I just had a reconditioned 300tdi engine put in my p reg discovery. It feels slow to accelerate and top speed is only about 75mph. The garage adjusted the timing to its' optimum setting which improved the speed slightly and smokey exhaust completely. The discovery is very slow (approx 55mph towing 1.5tonne flat surface) and sluggish generally. Help Help Help!!!!! Please Please Please. The car stands me nearly 7 grand already! Many thanks in advance. Tom Quote Link to comment Share on other sites More sharing options...
steve b Posted December 22, 2007 Share Posted December 22, 2007 Hi Tom , and welcome to LR4x4, If you have a full recon. engine it might be wise to run it in for say 1000miles before towing/ fast road journeys? The timing for the injection pump and cam is very easy to do on TDi's which makes me wonder what needed adjusting after the build? Also when the recon. was done was the inj.pump overhauled/calibrated? old injectors used or new? finally and most simple is the fuel lift pump new? these engines will run with a failed lift pump but it can make it slower. Smoke/lack of power can also be caused by loose pipework on the pressure side of the turbo so check for split/holed/loose hose clips - usually accompanied by whooshing or whistling noise. Some food for thought hopefully B) You may find something using the search button on here or in the tech. archive , let us know how you get on, oh and where are you based ? Cheers Steveb Quote Link to comment Share on other sites More sharing options...
Tom bell Posted December 22, 2007 Author Share Posted December 22, 2007 Hi Steve, I'm in Eccleston, near Chorley. I run a street theatre company and I pull a box trailer full of gear so I figured a discovery. I fish a lot in hard to reach places and my friends got some land that he needs maintenance work doing on, so I thought I could justify a discovery. As far as I know, they took all the parts from my old engine and put it on the recon. Any injectors would be old. They put a new radiator on supposedly. They reckon they have 'advanced the timing 4 times'. I'm a bit concerned that in trying to judge it's performance, I've driven it too hard for it's new engine. It's got 330 mile on the clock. Anyway, that won't account for the fact that it was slow when I originally picked it up. It's a worry. An expensive one! This forum helps though. I was on the brink of selling it and taking a loss of 4.5 grand. Thanks Steve. Hi Tom , and welcome to LR4x4, If you have a full recon. engine it might be wise to run it in for say 1000miles before towing/ fast road journeys? The timing for the injection pump and cam is very easy to do on TDi's which makes me wonder what needed adjusting after the build? Also when the recon. was done was the inj.pump overhauled/calibrated? old injectors used or new? finally and most simple is the fuel lift pump new? these engines will run with a failed lift pump but it can make it slower. Smoke/lack of power can also be caused by loose pipework on the pressure side of the turbo so check for split/holed/loose hose clips - usually accompanied by whooshing or whistling noise. Some food for thought hopefully B) You may find something using the search button on here or in the tech. archive , let us know how you get on, oh and where are you based ? Cheers Steveb Quote Link to comment Share on other sites More sharing options...
steve b Posted December 22, 2007 Share Posted December 22, 2007 Another thought Tom , Do you know if its mechanical injection or electronic ? is there an air flow meter in the intake hose between air filter and turbo and does it have a throttle cable on the injector pump? Most auto 300TDi's are electronic inj. so it could easily be something on the control side : air flow meter, throttle pedal potentiometer or wiring/plugs loose or broken. Its pretty unlikely you have damaged the engine, its just worth bearing in mind a new engine will be 'tight' so less inclined to rev and may need 1-2000miles to loosen up...presumably you have a warranty period with major work like this so you should have time to see it through cheers Steveb Quote Link to comment Share on other sites More sharing options...
sotal Posted December 22, 2007 Share Posted December 22, 2007 I've got a similar age 300tdi with the Auto box, they will easily see 95mph not sure how much above that they would go, but the lift pump is the easiest and cheapest thing to change which would hopefully sort it Quote Link to comment Share on other sites More sharing options...
sotal Posted December 22, 2007 Share Posted December 22, 2007 oops double post Quote Link to comment Share on other sites More sharing options...
Tom bell Posted December 23, 2007 Author Share Posted December 23, 2007 Ah Sorry I didn't post a reply quickly. I was monitoring it incorrectly through 'my assistant'. Anyway. To be honest I have no idea what type of injection it is or whether there is an air flow meter etc. I plan on prinintg this conversation out and literally taking it to the mechanic. The engine sound like it is 'tight' yes and sounds like it about to burst from the bonnet if I try to go above 60 / 70 so I don't!!! It also seems to be using a lot of fuel. Regarding the warranty, I have one on the engine itself but I'm unaware of the mechanics position on warranty. Thanks Steve. Do you know if its mechanical injection or electronic ? is there an air flow meter in the intake hose between air filter and turbo and does it have a throttle cable on the injector pump? Most auto 300TDi's are electronic inj. so it could easily be something on the control side : air flow meter, throttle pedal potentiometer or wiring/plugs loose or broken. Its pretty unlikely you have damaged the engine, its just worth bearing in mind a new engine will be 'tight' so less inclined to rev and may need 1-2000miles to loosen up...presumably you have a warranty period with major work like this so you should have time to see it through cheers Steveb Quote Link to comment Share on other sites More sharing options...
Tom bell Posted December 23, 2007 Author Share Posted December 23, 2007 I'll get the mechanic to try that. Thanks. Quote Link to comment Share on other sites More sharing options...
TheRecklessEngineer Posted December 24, 2007 Share Posted December 24, 2007 Timing springs to mind...sounds a little suspicious if it has been advanced several times already. Could also just be tight - I bought a disco with just a few k on the engine and it took another couple to stop drinking fuel. A good thrash down the motorway in 4th did it a lot of good. Got 30k on it now and its looooverly Quote Link to comment Share on other sites More sharing options...
Tom bell Posted December 25, 2007 Author Share Posted December 25, 2007 Yeah, I also think that has a part to play in it. I hope I get to the popint where it's loooverly. What do people think of a 54 ish plate discovery? Reliable? Money pits? Quote Link to comment Share on other sites More sharing options...
Tom bell Posted January 18, 2008 Author Share Posted January 18, 2008 Just a note to let you know what has happened. The mechanic checked the injectors, they were fine. He bled the lift pump and made sure all was ok. He cleaned a filter out, now I don't know what filter it was, but anyway it seems to have worked. I can get 95 out of it now with a very top speed of 100. Is this about right for a p reg 300tdi? cheers Quote Link to comment Share on other sites More sharing options...
davie Posted January 18, 2008 Share Posted January 18, 2008 I would say thats doing rather nice for the speeds, i could get 110 out of mine, but only on a dead straight loooooooong downhill run and that was getting a lil scary!! Quote Link to comment Share on other sites More sharing options...
steve b Posted January 18, 2008 Share Posted January 18, 2008 Hi Tom , Sounds fine now, good out come , have fun with it B) Steveb Quote Link to comment Share on other sites More sharing options...
RRX Posted January 18, 2008 Share Posted January 18, 2008 Sounds fine but i would be worried if he just cleaned a filter out. replacing the filter would be the reccomended way and bleeding a lift pump is a new one on me :S Quote Link to comment Share on other sites More sharing options...
lynall Posted January 19, 2008 Share Posted January 19, 2008 Maybe he cleaned the gauze filter fitted to some lift pumps? Lynall Quote Link to comment Share on other sites More sharing options...
sotal Posted January 20, 2008 Share Posted January 20, 2008 if it does have that filter in the lift pump then I would ditch it as it's too fine to filter the fuel before it gets to the filter. Sounds good though now - sounds like he sorted it Quote Link to comment Share on other sites More sharing options...
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