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Best not to use it or you may ruin the trans in as little
a ten miles & may have already, using it in failsafe
Fail Safe is there to protect the trans, but only if you stop
using it almost when the light comes on.
It will cut injector pulse,ignition spark & such, to let you
know your have a problem & lock the trans in a specific
gear,BUT folks still continue to cycle the ignition key &
drive on, to the tune of $5.000 leaving their bank account
I'm guessing that you got an air lock in your fuel system as a result of your changing the fuel filter... I certainly don't know about a BMW diesel, but in most semi-truck engines, there is a priming pump just for the purpose of getting the air out ... and the fuel into.... the fuel system. I've even been known to fill the filters with diesel fuel before screwing them onto the base.. This is risky because of the possibility of allowing some foreign, unfiltered debris to get into your pump and/or injectors, just because of your putting unfiltered fuel into your filter... Check and see if there is some kind of priming pump close to the filter. Also, a possibility is that you may have an electric fuel pump.... as to where all you may need to do is loosen a fuel fitting on the pressure side of the pump and filter.... and allow the electric pump to purge the system of air.. I confess to my lack of knowledge on your BMW.... but, I do have some basic understanding of most diesel systems... Good luck..
chances are you picked up some s..t from the bottom of the tank,use some injector cleaner when you next top up with diesel,should clear the smoking problem.
usual problem ,valves in injector worn for the fuel pump.easy quick fix this one ,fit a non return valve in the inlet pipe,check flow direction on valve when fitting and evan better as well is another in the bleed off return pipe .valves available from a motor factor or a specialist garage like bosch or lucas ,cut pipe and fit the valve with a piece of rubber pipe to connect the valve in line.or listen to the people who want to milk the golden cow and have the whole injector pump overhauled .
Your description reminds me of several vehicles I have encountered in my career that behaved in a similar way. They had all had body repairs at some previous time near the fuel filler and all gained something in the fuel tank - cloth or worse a plastic bag that was used for masking purposes.
One van was fitted with a high pressure pump by the dealer at a massive cost only to discover there was no improvement - they later removed a plastic bag from the fuel tank.
Water in the tank is another possibility. If there is a strainer in the tank it will be typically too fine for water to pass through.
If there is no obvious faults I suggest you ensure there is nothing in the tank but good clean fuel and the pipework is good including the breather system.
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