Vehicle & Technical > Discovery
New engine isnt as great as I was hoping.
Disco Matt:
I was thinking that the kickdown might do something clever with the throttle setting to give it more oomph - I know little about auto boxes but that would be my best guess.
Range Rover Blues:
James, the kickjdown consists of a cable from the gearbox to the throttle mech. It has a choice of 4 holes on the TDi pump (and extra bracket is bolted onto the throttle arm) so you can alter how sensitive it is, youd be surprised how much it kicks down though.
the electric multiplug for the auto box handles the reversing lights, starter interlock (N ro P only) and the air suspension/engine ECU inputs. Yes you can drive it like a clutchless manual, that's what a lot of drag racers do bu fitting a manual valve block. LR are unusual in fitting a selector with all the gears on it. Just remember it won't change down at too high a speed in order to avaoid over reving the engine.
Just a thought, is it a Diesel auto box?
That piep I mentioned goes form the turbo elbow (along with the waste gate) round the back of the engine to the very top of the fuel pump, the round diaphram that controls fuel enrichment. Might be worth having a look inside the pump to check it's not seized. I'd expect a tiny bit of black smoke on hard acceleration as you open the throttle.
muddyjames:
the auto box is my original one so guesing it has never ben changed I think it is a diesel one? It may have been changed in the past maybe.
Does the pipe look like a braided one that goes to the big main air intake from air box to back of engine and goes to the top of the engine by the glow plugs? That one is definately on as I even put a jubilee clip around it to hold it in.
I get a puff of black smoke eveytime I start the disco from hot and cold. Havent seen any smoke on hard aceleration.
bilge rat:
sounds like you may be looking aty the wrong pipe there . the pipe is only about a thick as a pencil . not braided. worth checking ..alan....
peasey:
Having thought about this for a while now this is what i would do, in this order but its up to you.i would put everything on it as if it came from the factory,put that kick down cable on as for screwing the engine up i recon thats doubtfull but any way its got to be better than having to change things manually otherwise you may as well have a manual box(if you need help or some pics as to where things go i will post some up for you).Then check the timing as others have described if you have done the double tightening technique on the pump pulley i cant see its far out but check and double check the puff of smoke sounds normalish to me and i dont think its much to be concerned about but mine doesnt do it.then i would check the turbo can you here it whistling while driving?you have already ruled out a intercooler leak by filling it with petrol and cleaning it so forget that but the pipework is important you are looking for splits leaks holes and the pipes collapsing(sucking flat)when the engine is reved make sure all the jubliee clips are tight and pipes are pushed on correctly i use a spanner to nip the clips up tighter than screwdriver tight,check that the egr blanking plates are air tight i made mine fitted them then put the egr back on so i didnt have to worry about blanking other pipes and plugs were not left floating around,next i would check the turbo its self i used a compression tester because it registers the max boost and holds there so you can drive the car normally and see what boost you are getting the tester is cheap at around £18 it should read between 0.8to1.0 bar of pressure as standard(14 psi= 1 bar) if thats ok then check the engine compression buy removing a glow plug now this is where you will have to make an adaptor to fit the glow plug hole for you compression tester,i just drilled through a glow plug and connected it with a small piece of hose with a couple of jubilee clips screw this into the glow plug hole and crank the engine over now my compression tester is one for petrol cars as they are cheaper than the diesel ones so the reading will probably go off the scale but this is what you want if the reading is low pour some engine oil down the plug hole and repeat if it is high as it should be then your piston rings or bore is shot(as we have already checked the timing)repeat this for all cylinders(4 in total)oh before you try this remove the stop solonoid wire on the diesel pump so it wont start!if the readings are low this is where your problems are im not sure what they should be but they are alot higher than a petrol engine and should be well into the red section on your guage.if the engine has been sitting for a while the piston rings can seize to the piston and create low compression but only usually if there has been water left in there from say a busted head gasket.now move onto the exhaust im no expert here so im only telling you what i would do,take the cat off if you have one and check that its clear and free flowing(blow through it) and repeat for other boxes in the system i doubt weather its restricted in any way but worth checking as my cat has started to collapse inside.Right next thing to check is do all the wheels turn freely when jacked up,what were looking for here is if the brakes are binding(stuck on) check all 4 wheels but i think that you would have noticed that as you usally get a burning smell and or pulling to one side but you could have more than one binding as you motor has been sat idle for a while while changing the engine.sorry but this is where im running out of ideas.I find if your slow and methodical you will find whats wrong eventually,i have a 300 tdi so if you need any pictures of things just ask and i will put them on here for you.oh and a word to the wise,i live next door to a copper and he abuses any vehicle he has so in future i would avoid there things,i would be the same if i didnt have to pay for it or fix it.Anyway im ending my epic post here hope it sheds some light on things mate,best of luck,PAUL.
P.S. A full bush kit helps with the handling but we will leave that for another time i think!!! :lol: :lol: :lol:
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