Question about 1997 Land Rover Defender 90

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Defender fuel problem

It smokes like mad if i bypass the fuel filter put both pipes im a jug full of diesel runs like a dream changed filter no diffrence

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Youve got me here thats for sure ,old diesel man like myself and as this is a 97 then i wouldnt expect to find a lot of electronic gizmos.Only thing i can think of on the quick here is that their is a fuel pump in the tank and it should only run for a few seconds on start up to clear any air in the system and some reason its staying on all the time ,so check it out with a manual or look at the tank and see how many wires are running to the sensder unit in the tank ,if two wires then thats just the gauge but if two more heavier thicker cables then it has a fuel pump and if so disconnect them and try it without this pump running ,if it works then fit a non return valve in the feed pipe by the pump and this will stop the fuel running back ,just like the old motors i used to work on in the year dot .The fault is if iam correct is either a relay sticking or a faulty ECU ?? Sorry i cannot be more specific as havent done one as YET?? Now how about changing a clutch on 1962 land rover ?? i used to enjoy spending all day taking the floor out??

Posted on Dec 02, 2012

  • edward_eggle
    edward_eggle Dec 02, 2012


  • Colin Stickland
    Colin Stickland Dec 03, 2012

    thats on the top of the tank ??? now follow the fuel line from the tank to see if it has a pump in the chassis somewhere ,if it runs ok as you say then its not drawing in air as this would result in bad starting and lack of power and iratic idle now black smoke ,this is caused by excess fuel and the only way for that would be a higher than required inlet fuel pressure causing overfueling ,quick test is remove the inlet pipe pipe from the filter and turn ignition on to see if fuel comes up on cranking engine ?? failing which make a gasket from a coca cola can and block off the EGR valve ,you know the thing that connects the exhaust manifold to the inlet manifold as this will cause lots of black smoke if clogged up and staying open



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Posted on Jan 02, 2017

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SOURCE: 1999 landrover range rover 2.5 diesel put petrol

I would start by looking for the valve on the fuel rail (or at the filter housing), if you disconnected the fuel pipe from the filter feed you will have a lot of air in the system (and diesels do not like air in the feul system) you will need to have someone crank the motor over while you push in on the schrader valve to release the air out of the system until you get fuel to flow steady out of that port (this may take a short period of time), then you should be able to start the vehicle... would also recommend replacing the fuel filter as well. Hope this helps.

Posted on Mar 10, 2009

  • 2002 Answers

SOURCE: 1998 diesel freelader is pinking

You have a leak somewhere that is letting the fuel system **** in air. This is serious and needs to be taken care of immediately. Check all your lines and fittings for wet spots or signs of fuel leaking and repair. Also double check to make sure your new filter is on tight and no fittings have been put on crossthreaded. Hope this helps.

Posted on Nov 01, 2009

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  • 1 Answer

SOURCE: have a 98 defender 300tdi fitted new cylinder head

did you ever sort this problem im having the same

Posted on Dec 02, 2012

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