hi all, just got my first disco 300 tdi, 95 model, all welding been done, new headgaasket, waterpump, fuel injector pump, so looking good, but it started blowing black smoke and no power so blanked off egr and got a turbo because old one was leaking oil and plane inside was all over the place, stated her up and all was well, bit of black smoke but put that down to all the crap left in system, i drove it to get a bottle of redex and put that in the tank and drove back, after a couple of miles i lost power and loads of blue/white smoke bellowing out, car wont rev over 1500 rpm and sounds terrible, miss firing and noisey, so i fitted a new fuel filter but still the same, please help thanks
hi thanks for reply, car wasnt this bad before i changed the turbo and did egr blank, previous owner did the head etc on the car, would timing be affected by putting turbo on the car or do you think putting redex in as shiffted a bit of crap and clogged up something, cheers
Are you sure all your turbo hoses are leak proof and in good condition(particularly the ones you disturbed).If the smoke you are seeing is black,it will be over fuelling (not enough air -collapsed air filter,or hose or similar)-changing turbo will not alter timing.How did you blank off the egr?
Expanding and going hard is good-what temperature is she running at?-not hot hopefully.
In case you have load of ****e in the fuel tank,run it off a bottle of pump derv under the bonnet-take a feed from the bottle to the lift pump input and put return line from injection pump leak off back to the bottle-(if you use clear pipe you can see if you have any air bubbles to deal with too).Run her like this and see if things improve-if good, suspect sedimenter or tank-also if delphi lift pump,undo screw on top and inspect guaze underneath-assuming it has not over heated and timing belt has not jumped some teeth(rare) ,cannot be much wrong even though it seems dire at the mo.
In case you have load of ****e in the fuel tank,run it off a bottle of pump derv under the bonnet-take a feed from the bottle to the lift pump input and put return line from injection pump leak off back to the bottle-(if you use clear pipe you can see if you have any air bubbles to deal with too).Run her like this and see if things improve-if good, suspect sedimenter or tank-also if delphi lift pump,undo screw on top and inspect guaze underneath-assuming it has not over heated and timing belt has not jumped some teeth(rare) ,cannot be much wrong even though it seems dire at the mo.
I'm having trouble understanding what's happening ... this is what I think you say ...
You got the Disco with a new HG, WP and IP and it was running OK?
After a while it started putting out black smoke and lacking power? Was this within a few miles, hundreds of miles, thousands? Was it a sudden change or progressive?
You then de-egr'd and replaced the turbo and after a few miles blue/white smoke and no power etc?
Could be that the HG change wasn't done properly, or was done OK, but the head wasn't skimmed and it blew again. It sounds a little like the egr/turbo has little to do with the problem ...
You got the Disco with a new HG, WP and IP and it was running OK?
After a while it started putting out black smoke and lacking power? Was this within a few miles, hundreds of miles, thousands? Was it a sudden change or progressive?
You then de-egr'd and replaced the turbo and after a few miles blue/white smoke and no power etc?
Could be that the HG change wasn't done properly, or was done OK, but the head wasn't skimmed and it blew again. It sounds a little like the egr/turbo has little to do with the problem ...
thanks will try bottle and checking lift pump, temp never goes over halfway, i got disco 2 weeks ago and chap said he had changed headgasket along with ip and water pump, he said he had just done it along with all the welding, car ran ok but black smoke and no power so i did egr and checked turbo witch was loose inside so changed that, now i get blue/white smoke and it wont rev over 1500 rpm.
The 1500 rpm thing is about where the turbo is due to kick in,are you sure all your hoses are in good shape(not delaminated inside)-presumably the cooling system is not pressurising up and losing water(ie head gasket gone again).Where abouts are you?Where did the new turbo come from?When you did egr is the inlet pipework stuffed with black muck-the engine needs to breathe easily.
im in leicester, turbo from ebay and from a low milage disco, there was a load of black crap when i did egr so cleaned out what i could, i tried removing turbo hoses and tried to rev up but still wont go over 1500 rpm, im not a great derv mechanic but if it was a petrol car id say it was timing due to loud pinking noise when i try and rev her, im not to confident in trying to set timing up ( above sugestion about jumping teeth ) is it a big job?
thebiglad
Well-Known Member
im in leicester, turbo from ebay and from a low milage disco, there was a load of black crap when i did egr so cleaned out what i could, i tried removing turbo hoses and tried to rev up but still wont go over 1500 rpm, im not a great derv mechanic but if it was a petrol car id say it was timing due to loud pinking noise when i try and rev her, im not to confident in trying to set timing up ( above suggestion about jumping teeth ) is it a big job?
Hi there, just read through your thread and here are a few thoughts:
1. Re the rubber elbow turbo hose:a. if it bulges under pressure it means the rubber is old and it needs replacing; b. if it bulges under pressure it could mean the hose is delaminating on the inside and partially blocking the elbow, causing it to bulge. Just replace the hose with a new one, they cost pennies.
2. Re the cam timing belting. Very straightforward to do, made easier if you take out the radiator (gives you an opportunity to flush it and the intercooler as well) and grill so you can see the timing marks face-on. Does sound like it worth a look.
Good luck
Dave
hi update, tried bypassing sedi filter but no change ie used bottle of derv direct to lift pump, but what i have found is that when engine running on tickover i undid each injector pipe at top of injector, 3 sprayed fuel and made engine tone change but one sprayed but didnt change tone of engine, i took that injector out and cleaned it but after refitting it didnt alter anything, also undid top bolt on fuel filter to see if there was any air but just fuel came out. would a faulty injector cause my problems ?
If the injector you took out sprayed similarly to the others then it doesn't sound too faulty! However, it didn't change engine tone so it suggests that that cylinder, for whatever reason, is not working. Time to check IP timing, and try to check that there's still a piston in the cylinder .... or that the head gasket hasn't gone around that cylinder, though I doubt that'd make it as bad as it sounds.
discomark10
Well-Known Member
to me, sounds like a fuked turbo!
discomark10
Well-Known Member
if you do still think its the head gasket, try testing each clynder with a compresion tester
Thought you meant from the spray head 'cos you said you took the injector out .. I'd get it out, indeed I'd get 'em all out and check their condition and maybe send 'em all or just the one depending on cost, to be refurbished.
turbo was a good one, took pipe off again and vanes spin free and hardly any play, if it was no good like the one i took off it would still rev up, reading loads of posts on same problem and it seems its a timing problem, still trying to find wich three flange bolts i have to undo to move ip body lol
