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200TDi problem

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ninety:
Hello

I'm trying to diagnise a fault on a friend's 200TDi (H-reg) discovery.

It's a pig to start in the morning.  It turns over and over and over, then fires into life, then quits, and this cycle repeats 3 or 4 times until eventually, it will barely tick over, with your foot flat to the floor.

If you release your foot it stops.

it gradually gets better, until it runs on all 4, but until all 4 are running it bellows thick white smoke out.

Once it's running, it's not bad.  It drives ok, but it quite white-smokey on overrun.

Once it's warm, it starts first time too.

While it's running on the one cylinder, but before it has all 4 going, I tried loosening the nuts on the injectors to see if fuel was getting there.  3 of them are very foamy, and one is liquid spurts.

As it gets better, the fuel seems to get more liquid.

So, is there some kind of fault with the injector pumps on these that can inroduce air into the system?

I cannot see any trace of a fuel leak, thinking that if air was getting in, fuel could get out.  Have jetwashed it today to make it easier to see leaks.

Thanks

Colin

beast5680:
check the filters and see if there is water in the fuel
check all the connections to make sure they are airtight, i have had a problem with the ones on the tank sender before under the rear floor

if its a pig to start you may have another problem with the glow plugs not working

it is possible you have a head gasket problem if you get loads of white smoke this can be an indicator of water getting into the combustion cycle, does it use water? or pressurise the system?

anyone else have any thoughts?

muddyweb:
I have to say it sounds like a duff injection pump to me.

The only other idea I have is that the injectors might be leaking... so the pressure in the lines is disappearing overnight...  but that is a pretty long shot and I'm not event sure it would cause the symptoms.

ninety:

--- Quote ---check the filters and see if there is water in the fuel
--- End quote ---

Could be worth checking - will add it to the list of things to try.


--- Quote ---check all the connections to make sure they are airtight, i have had a problem with the ones on the tank sender before under the rear floor
--- End quote ---

Again - will add it to  the list of things to check.  Have checked all the ones under the bonnet, looking mainly for fuel leaks, rather than holes in pipes.


--- Quote ---if its a pig to start you may have another problem with the glow plugs not working
--- End quote ---

Glow pulgs definately working (or at least one of them is!) - I get a voltage drop and dimming of lights etc etc.


--- Quote ---it is possible you have a head gasket problem if you get loads of white smoke this can be an indicator of water getting into the combustion cycle, does it use water? or pressurise the system?
--- End quote ---

I had considered this as I've just replace the CHG on their 300TDi.I don't think this is the case because it doesn't pressurise the system, and it doesn't consume water.

Thanks for the reply :)

Dr Neil:
it might be worth checking the cambelt timing/pump timing,if the belt is worn it could have gone slack varying the timing. the pump could be out of timing,if everything else is o.k. check the pump timing. Paul on the club has done a "howto" on adjusting the pump timing!
just a thought....

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