 | Home > Tdi > 200tdi - slow - not pulling great/pump tuning does nothing!? |
 
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| Harry.O Member Since: 25 Jul 2014 Location: Warwickshire Posts: 713   
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A few things to check once you've done the filters, small rubber pipe to turbo actuator and intercooler pipes for leaks or internal de-lamination. Is the fuel sedimeter still fitted and corroded/blocked? Also check that the diaphragm inside the FIP doesn't have a hole and that there is no corrosion on the pin below that could be causing it to stick.
Have you got a boost gauge that you could plumb in to monitor pressures? |
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12th Jun 2017 8:54am |
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| benniferj Member Since: 20 Oct 2016 Location: Basingstoke Posts: 361 
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Cheers for the reply.
I will replace the filters which should replace the sedimentor at the same time / i'll give it all a good clean up! I think it may well be a hole in the turbo-pump pipe but hard to tell parked up! I gave the diaphragm a good inspection and it seems fine and the pin itself was in good nick with just a teeny bit of corrosion which I've cleaned off and it still had a small blob of light grease on the taper. Intercooler hoses are proper silicone replacements, not that old, but again i'll remove, check and seal again. I don't have a spare boost gauge for this motor, the 90 has all the bells and whistles! If a few replacement pipes don't fix it i'll order and install one. I have a spare EGT gauge that I can put in the manifold too but to be fair didn't really want to add a dash pod to this one as it's a Camel Trophy rep and not really in keeping with what I'm going for with it. Cheers! |
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12th Jun 2017 8:58am |
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| yostumpy Member Since: 01 Aug 2010 Location: n/kent Posts: 327 |
also, if your lift pump has a screw on the top, unscrew this, and clean all the crud out of the gauze filter. you've probably got diesel bug. so stick some additive in the tank to clean out / kill the algea, run it thro, then change filter again. ( It looks like a black slime (thin worms) inside your filter. If the filter is clean, then you prob don't have the BUG!
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12th Jun 2017 11:26am |
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| benniferj Member Since: 20 Oct 2016 Location: Basingstoke Posts: 361
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Ok... new lift pump. New turbo-pump hose. New fuel filters. And the state of the sedimentor was shocking. New air filter for good measure.
I'll see what it's like on the way home! It sounds good now I've run fresh fuel through. I noticed the old turbo pump hose was routed a weird way and that the bolt that holds the eyelet end was rotated in such a way when tight that it would have not been open to the hose at 90degrres so have set that so it's got a clear path. Totally rank.  Click image to enlarge |
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12th Jun 2017 2:09pm |
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| yostumpy Member Since: 01 Aug 2010 Location: n/kent Posts: 327 |
how was it on the trip home?
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13th Jun 2017 8:26am |
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| benniferj Member Since: 20 Oct 2016 Location: Basingstoke Posts: 361
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Better - it's running a lot smoother with all of those changes and parts cleaned and serviced.
That said it's still a bit flat in 5th. Im not sure if I'm expecting too much - what should a Disco 200 be able to do on BFG Mud 285s, 2" lift and a roof rack etc on it? I thought it would be good for cruising a flat motorway at 70 - as it stands it can only even hit 70 on a downhill run! My 90 despite having a lower geared transfer box can still hit 70 even though by then the revs are too high to want to drive like that. My suspicion is that if I had the 90's engine in the Disco that it would easily cruise to 75. The 90 is so keen in comparison. |
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14th Jun 2017 1:31pm |
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| Mo Murphy Member Since: 01 Jun 2008 Location: Letchworth Garden City, Herts Posts: 2227 
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With the 285s and the 1.2 transfer box I suspect you are horribly over geared. I would suggest trying a 1.4 Defender transfer box to lower the overall ratios.
Mo The Land Rover 90 - Many are called, few are chosen. 50 Shades of Pennine Grey |
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14th Jun 2017 1:59pm |
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| benniferj Member Since: 20 Oct 2016 Location: Basingstoke Posts: 361
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How can I tell what transfer box is in it?
Or are all 200tdi Discos (93 in my case) on 1.2s? Gearing feels quite well suited to the car in the first 4 gears! |
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14th Jun 2017 2:01pm |
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| yostumpy Member Since: 01 Aug 2010 Location: n/kent Posts: 327 |
Not forgetting to mention, that with 285's not only are you overgeared, but your speedo reading will be wrong also, confusing the matter. Folks that swap the tbox on a defender for a 1.2 version, don't usually get better mpg. The engine has an efficient rev range, and by uping the gearing, you either fall short of that efficient range, OR go faster to keep in the range, BUT by doing so you are pushing much more air out of the way, which is hard work.
So you're overgeared disco is ...er. struggling. Borrow some std wheels and see what its like then. |
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14th Jun 2017 4:17pm |
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| Mo Murphy Member Since: 01 Jun 2008 Location: Letchworth Garden City, Herts Posts: 2227
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If you go to Ashcroft website, it explains how to identify your transfer box ratio from the box's number. If the transfer box is original then in all likelihood it is 1.2 ratio.
Defenders and Discoverys have the same overall gear ratios when standard. The Discovery had a higher ratio transfer box to compensate for the smaller tyres which were fitted as standard. Land Rover went to a lot of trouble originally to get the gearing right and I've always found it best to stay with those overall ratios. HTH Mo The Land Rover 90 - Many are called, few are chosen. 50 Shades of Pennine Grey |
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14th Jun 2017 4:47pm |
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| Kit Member Since: 12 Feb 2016 Location: Shropshire Posts: 1110 
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Have you checked if any of the brakes are binding? 1993 200 Tdi 90 CSW
1956 Series 1 Hard-top 1958 Series 1 Soft-top |
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14th Jun 2017 8:23pm |
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| benniferj Member Since: 20 Oct 2016 Location: Basingstoke Posts: 361
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I may try and find some standard wheels and give them a go just for comparison. But i'm unlikely to actually change back from 285s... they're as small as i'd want to go for an all rounder.
I'm aware of the speedo issue and I am taking speedo readings as far as this thread is concerned from an accurate sat nav showing the correct speed. I will check the transfer box as to what ratio it is, maybe a 1.4 would be the answer! It's still really weird that this vehicle pulls so well in all the other gears and 5th is just so flat... and again i'm certain that with the 200 from my 90 it would fly as that engine tuned up so impressively well and this one... well... usual tweaks just don't make a huge difference! Front right brake binding just very slightly and new caliper ready to fit. |
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16th Jun 2017 7:52am |
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| mini Anaconda Member Since: 23 Aug 2016 Location: Thames Valley Posts: 783
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I have a 90, and the previous owner fitted a Discovery 200tdi and gearbox. I run 245/75/16 BFG Mud Terrain tyres and I find 5th isn't really useable unless you are on a long stretch of flat road. If you drop back to 50mph or have to go up a longish incline, then I have to drop back into 4th.
It pulls very well through all the other gears, just 5th seems a bit gutless. When these tyres wear out, I intend to fit a slightly larger size of mud tyre, 265/75/16. P.S. - the 200tdi is completely standard, no performance mods on it. |
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16th Jun 2017 10:02am |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11324
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If you fit larger tyres then you'll make that problem worse.
To be honest though, 245/75 isn't that big - it's about half way between standard Discovery and standard Defender size. I ran a 300tdi Discovery with that size tyre for several years and never had any problems with using 5th gear, which suggests that your 200tdi may benefit from a bit of attention (maintenance rather than tuning). Darren 110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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16th Jun 2017 12:03pm |
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