Megansfolly Posted March 8, 2009 Share Posted March 8, 2009 went for a drive in my defender(disco engine) now i am runnig it in after a rebuild but pulls like a train up to 2k after this its like a wet fart i placed a boost guage loosly on the pipe and i am achieving three psi so do i need to adjust anything or is turbo knackered waste gate actuator ? after2k on th revs there a slight miss but its been cold everytime i ve drivein it so could be it needs warming up Quote Link to comment Share on other sites More sharing options...
western Posted March 8, 2009 Share Posted March 8, 2009 IIRC you had to move the actuator & compressor housing, maybe the actuator diaphragm has split & not giving any boost or there's a big leak in the boost pipe between injection pump & actuator, or the diaphragm in the boost capsule on top of the pump is split/holed. Quote Link to comment Share on other sites More sharing options...
Megansfolly Posted March 8, 2009 Author Share Posted March 8, 2009 i moved waste gate actuator i ll run a new pipe to the pump from turbo after some research the symtomes blue smoke on 2k+ revs no boost does point towards the diaphram doesnt it where can i get one from and is it easy to fit and can i check it easily Quote Link to comment Share on other sites More sharing options...
western Posted March 8, 2009 Share Posted March 8, 2009 From a Bosch Diesel injection supplier/repairer or nearest diesel specialist. you can check by lifting the lid off the injection pump, just 4 screws IIRC. Quote Link to comment Share on other sites More sharing options...
Megansfolly Posted March 11, 2009 Author Share Posted March 11, 2009 ok now i am confused so last nite i took the diaphram out all looks ok no splits no wear actually looks pretty new so i put it all back togeather checked the pipe from pump to turbo t piece no splits holds pressure. so i took my boost guage out of it packagin and linked it in just after pipe runin to waste gate actutaor. on start up all is good as i slowly start to rev th eengine the boost guage does not move on higher revs it is very slightly suckin air from the boost guage as i get -3 psi i am stumped to no what it is sound to be like the turbo is not workin or the t piece is blocked any help guys would be great as i am truely stumped many thanks matt Quote Link to comment Share on other sites More sharing options...
reb78 Posted March 11, 2009 Share Posted March 11, 2009 on start up all is good as i slowly start to rev th eengine the boost guage does not move on higher revs it is very slightly suckin air from the boost guage as i get -3 psi I'm not sure if this is right, but I thought you had to check the boost with the engine under strain i.e. the vehicle moving foot flat down in 3rd accelerating? Might be why the figure was low (or i misunderstood what you wrote and you did this anyway!) Quote Link to comment Share on other sites More sharing options...
Lars L Posted March 11, 2009 Share Posted March 11, 2009 And the aircleaner isn't blocked? I ask because I had the same symptoms, it turned out that a piece of plastic foam blocked the airbox inlet... Quote Link to comment Share on other sites More sharing options...
ian_s Posted March 11, 2009 Share Posted March 11, 2009 if you take the pipe between the airfilter and turbo off, can you see the rotor inside? does it spin? simple check, but the turbo on my 200tdi was stuck when i fired it up for the first time, and did move til it was prodded with a stick. if it was a problem with the wastegate actuator not functioning correctly, i would expect it to OVER boost, as the wastegate is closed until the pressure builds up and then the waste gate is opened. if you are getting blue smoke, that suggests oil is being burned!! thats bad. if the airfilter is blocking, as suggested above, then the turbo will be trying to suck air out of the crankcase, and so sucking oil in. Quote Link to comment Share on other sites More sharing options...
Megansfolly Posted March 11, 2009 Author Share Posted March 11, 2009 the air filter is new i ll try takin it off and try again Quote Link to comment Share on other sites More sharing options...
Les Henson Posted March 11, 2009 Share Posted March 11, 2009 If you are sitting there revving the engine, then you will go no boost. You have to put the engine under load, so drive it up a slight incline or more. You have to extend the boost guage to the inside of the vehicle with a length of hose so you can watch it as you drive. Les. Quote Link to comment Share on other sites More sharing options...
Megansfolly Posted March 11, 2009 Author Share Posted March 11, 2009 i am putting the engine under load just not driving it, i am gonna wip turbo off and see if there ay problems there Quote Link to comment Share on other sites More sharing options...
BigSi110 Posted March 11, 2009 Share Posted March 11, 2009 I think Ian S's reply is useful, Matt. Check to see if the thing is spinning and that there's no play in the shaft or rotor. Your outlet pipe is in a bad place, too. I seriously think you need to rotate the unit so there aren't any partial restrictions in the pipework. Then, what about using your compressor to blow all lines out - big and small. Just to be sure. Negative boost is a sign the turbo's had it, but checking thoroughly for any blocks in the system MUST be done thoroughly first. Really, really make sure of this before spending any more money on the old girl. Once you're sure, we'll sort out a date to get things done. Quote Link to comment Share on other sites More sharing options...
santalars Posted March 11, 2009 Share Posted March 11, 2009 i am putting the engine under load just not driving it, May I ask how you are doing this? Execpt from badly slipping the clutch I can only think of a roller rig. Quote Link to comment Share on other sites More sharing options...
Simon Smith Posted March 11, 2009 Share Posted March 11, 2009 May I ask how you are doing this?Execpt from badly slipping the clutch I can only think of a roller rig. Was just about to ask the same thing Quote Link to comment Share on other sites More sharing options...
Juz Posted March 11, 2009 Share Posted March 11, 2009 if the airfilter is blocking, as suggested above, then the turbo will be trying to suck air out of the crankcase, and so sucking oil in. This one gets my vote. Juz Quote Link to comment Share on other sites More sharing options...
western Posted March 11, 2009 Share Posted March 11, 2009 just done this with my 110 [200Tdi] rpm/boost gauges can be seen, the big jump in boost reading is when I increase to max rpm [3850] unfortunatly, the rev counter needle isn't very visible, the first shift of the boost needle was around 2000rpm & the largest shift was at 3850rpm [max rpm] Quote Link to comment Share on other sites More sharing options...
Megansfolly Posted March 11, 2009 Author Share Posted March 11, 2009 sorry wat i ment was i am revin the engine which should still allow pressure gauge to increase well took turbo off and its spils freely so now what Quote Link to comment Share on other sites More sharing options...
Lars L Posted March 11, 2009 Share Posted March 11, 2009 I have never got my boost gauge to move when freerevving. Like others have said, you have to drive it and uphill with foot on floor to get a true reading. Quote Link to comment Share on other sites More sharing options...
Ex Member Posted March 11, 2009 Share Posted March 11, 2009 You need to drive it to create boost. In order for a turbo to create boost, the mass flow leaving the engine must exceed that coming in. This only occurs when under load. Also boost only starts around 1500 rpm. Quote Link to comment Share on other sites More sharing options...
western Posted March 11, 2009 Share Posted March 11, 2009 well I got my tdi to give me boost as shown in the little vid above, but it's better to drive to get a proper feel for how much boost the engine is creating/using Quote Link to comment Share on other sites More sharing options...
Roverdrive Posted March 11, 2009 Share Posted March 11, 2009 Shame on you On a cold engiine as well. LOL To be honest I was surprised to see such a change in boost at " no load". If I hadn't seen the vid, I would not have thought it possible. Quote Link to comment Share on other sites More sharing options...
Les Henson Posted March 11, 2009 Share Posted March 11, 2009 I would suggest that it you are getting a boost reading while just sitting there revving the engine, then there's something wrong. Holding it on the brake, slipping the clutch, putting it's nose up against the wall, will not work. Extend a pipe from the original boost pipe to the inside of the cab and drive the vehicle - that way you will get a true reading throughout the rev range. Les. Quote Link to comment Share on other sites More sharing options...
western Posted March 12, 2009 Share Posted March 12, 2009 my engine was still warm from the drive home from work & everything is in fine order, nothing wrong at all. Quote Link to comment Share on other sites More sharing options...
Ex Member Posted March 12, 2009 Share Posted March 12, 2009 my engine was still warm from the drive home from work & everything is in fine order, nothing wrong at all. Temperature gauge is showing cold. Quote Link to comment Share on other sites More sharing options...
western Posted March 12, 2009 Share Posted March 12, 2009 well ok, it was still slightly warm, but it didn't do any harm, cos i drove it toady to/from work Quote Link to comment Share on other sites More sharing options...
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