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406 D8 2.1 TD - Fuel Issues....

Posted: Sun Apr 10, 2011 11:30 am
by 750frog
Hi,


I have just got a D8 2.1 TD wagon and it has some issues. I have been trawling the forum for someone who has a similar problem but I can't find it. The car will go along nicely then, after accelerating it will run lean or something and detonate, rattle it's head off! and spew smoke out the back... after a bit it will be fine and drive nicely. It has a huge loss of power.

1. The fuel pump has been tested and ok.
2. new filters in the main one and the tank.

The problem started after the previous owner changed the cam belt. Wondering if the problem is electrical or fuel related?

PLEASE HELP as I really want this car to be reliable.

Cheers, Tim.

Re: 406 D8 2.1 TD - Fuel Issues....

Posted: Sun Apr 10, 2011 4:27 pm
by StevieboyTD
That sounds very similar to the problem i'm having, but with a 1.9td.

Does the 2.1 Lucas setup have a sensor on the 2nd/3rd injector? If it does, check the wire, it'll be either frayed, snapped or worn through. It feeds the ecu with timing info, when the ecu gets no data it sends the engine into full advance, which makes it knock like a bitch and run like a bag of crap.

Go over a slight bump and the damaged wire falls back into place and suddenly everything runs fine.

Re: 406 D8 2.1 TD - Fuel Issues....

Posted: Sun Apr 10, 2011 4:58 pm
by steve_earwig
Needle lift sensor - it's on the injector nearest the cam belt, mine ran like a million mile taxi when it messed up.

Re: 406 D8 2.1 TD - Fuel Issues....

Posted: Sun Apr 10, 2011 10:38 pm
by 750frog
Sweet, After looking through the forum for about 4 hours i came to a similar conclusion. Thanks so much people. I have to fix the car or I will give it back to the old owner and get my money back... but the car is in such good condition that I really want to keep it.

Cheers, :cheesy:

Re: 406 D8 2.1 TD - Fuel Issues....

Posted: Mon Apr 11, 2011 2:06 am
by 750frog
ok,
so i have replaced what i thought was a faulty plug, can i get a new sensor to put in, or do i need to get a whole new injector?

Thanks, Tim.

Re: 406 D8 2.1 TD - Fuel Issues....

Posted: Mon Apr 11, 2011 5:37 am
by steve_earwig
I *think* the injector with the lift sensor is all one thing. Might be worth phoning someone like United Diesel to check.

Re: 406 D8 2.1 TD - Fuel Issues....

Posted: Tue Apr 12, 2011 10:44 am
by 750frog
OK,

So i took it to an efi place that fault checked the computer. came up with the fuel needle sensor and the pump timing sensor. Cleared the faults, went for a drive till it failed again. Checked the faults and the pump advance sensor was the culprit.
A replacement pump in Australia is $3000!!! (bout 1800 quid).

Apparently Diesel Bob does a bosch conversion on this motor. Anyone know of a kit?

I have been reading that the 1.9 bosch pump works on this motor as well. How involved is the swap? Does the lucas ECU plug straight in?

Thanks,