Thread: Why is my 300tdi not going so well?..

Just a quick check, Have you adjusted you accelerator cable, they will loosen off and cause a power loss. I have seen it a couple of times over the years. Start out diagnosis cheaply first, whens the last time you changed your air cleaner ? check turbo pipes and connections. Fuel filter and separator cleaned. Good luck.

Starts and runs well, no guts ? Assuming the work you've done already is OK I'd be looking at the turbo. Did you replace the turbo hoses with your rebuild ? could be one's de laminated internally or popped off. This would also give extra exhaust 'smoke' as unburned fuel is emitted. Hole in the intercooler, loose hose ?
I checked my turbo pressure by removing the hose from the turbo/manifold ? to the dump valve (pretty easy to see LHS of engine at rear below manifold near the turbo) and connected it via a length of clear PVC hose to a pressure gauge and went for a spin.


Deano

My defender did the same thing a couple of years back, the pipe that goes from the turbo to the pump broke and did not supply air pressure to the injector pump for increased fuel supply. Fixed the pipe and right as rain.


95' 110 Defender
58' 109 Ex NSWFB SerII
50' 80"
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Had the same problem a couple of years ago, ended up replacing the turbo and all hoses and that seemed to do the job. Also cleaned out the intercooler. Good luck.

I haven't touched the accelerator cable but I'll have a look. Do you the mean the plastic screw thingy on the last bit of cable to the injector pump?
Turbo hoses have been replaced already with silicon ones.
Air filter was replaced with the rebuild.
Boost pressure is sitting at 16psi, that reading is the same from either the turbo or the inlet manifold. Bruce Davies might have turned that up originally, I'm not sure if that's part of their tune?....
There are no unusual turbo noises at all.
Fuel filter is getting near it's due replacement, I think I've got one at home so might try that when I get back.
I haven't checked the air supply hose to the injector pump, that is a possibility.
And the intercooler has been flushed out as well.

So no one thinks it is the expensive things like injectors or pump???

Or the turbo, they aren't cheap either!!
To be honest it most seems like it's not getting enough air into it.... But if it's boosting the standard 16psi of pressure then it should be fine shouldn't it?..

yes the black round knob, just do it up to take slack out of cable, if you go to far the revs will start to rise.

I had a similar problem with my td5, turned out to be a blocked particle remover (like a cat). I don't think your tdi will have one of these but could be somewhere else in exhaust with a blockage. To test remove exhaust from outlet of turbo and take it for a short drive, if there is an exhaust blockage you will feel the difference immediately.
Good luck
Keith