Hi all,

I'm new in here. I have owned 2 Disco 300tdi's for almost 5 years and have been able to problem solve them myself. Now i have come across a problem i think is related to my fuel pump.

When i start up from cold it blows blue smoke that i'm convinced smells like diesel and missfires slightly for about 30 secs till revs are up and all cleared through. When driving little black smoke when off accelerater among this my consumption has gone from about 30mpg to about 25mpg or less and also i only get about 75% performance.

I have changed all filters, new head gasket, taken out egr valve and put in the bin, cleaned the intercooler and pipes, new glow plugs, new valve stem seals, new turbo (it would'nt have lasted much longer) new cam belt which i have had it checked by a mechanic and all is timed ok.

Spoken to a landrover mechanic friend of a friend of a friend he say prob fuel pump internally out of time with the front timing belt or knackered.

It is booked in to Northampton Diesel this fri (bosch experts) to look and test my pump.

Does anyone else have any other ideas i would be greatful.

Strange that, my motor has just started, on a cold morning, smoking for the first 200 yards or so, then Ok .. started just after having a new cam belt fitted at 120000 miles .. I wondered if, but cant believe that, they could have got it a tooth out of time

It did start with just smoking from cold but now it has got worse by losing power and costing more in mpg.

People kept telling me it was ok to do it and keep putting injecter cleaner but it has only started to get worse lately.

Do a search on "White Smoke". This is a thread I started recently and had great ideas suggested and I eventually sorted the problem out.

Thanks Toad,

I will have a venture through

Sounds like the problem mine had. I eventually got it fixed tonight! I changed glow plugs, injectors, turbo, valve stem seals and injector pump with no effect. It turned out that the timing was slipping because worn woodruff keys were allowing the crank timing sprocket to move. The fault came from a loose crank bolt which is a recurrent disco problem. Who did your timing belt change?

If your pump tests OK then maybe investigate

Me and a very experienced lorry mechanic, the belt has been on for 6 months or so and not had problem. Then it started smoking from cold no other problems put it down to the valve stems, which got changed, head back on all clean inside turned on the button and guess what no smoke at all. Now loosing power using alot of fuel and cold start getting worse, took all the front off again assuming pump out of time and a landrover mechanic checked it and said there is nothing wrong with the timing unless the inside of the pump is out of time to the front causing fuel in at wrong time creating loss of power and not burning enough. Will update you later on weather it is at fault as she is due in this morn.

My car is alive and well again, the problem was an out of time fuel pump, it has now been fixed and it turns over a beauty with no smoke no miss firing full performance.

Just got to sort my front shocks out now maybe tempt the missis to let me buy my lift kit now ha ha

was this timing belt? pump driver pulley out of time or something more serious?

rammers3beer said:

was this timing belt? pump driver pulley out of time or something more serious?

Click to expand...

Hello mate. In my case it turned out to be both of these things plus something else. For a starter it took all day to remove the crankshaft pulley that was well and truly jammed onto the crankshaft despite the bolt that secures it being loose when we came to start the job. Absolute pig of a job. When we got inside the timing casing we found that whoever had done the timing belt had done a real cowboy job on it and charged the old fella I bought it off a fair whack to do it.

We found that there was a pulley in there that was supposed to be a tensioner pulley but wasn't even a Landrover part and not only that, but the bolt that is supposed to be there to secure it was missing all together. As a result it had allowed the timing belt to slip 2 teeth and thus create all the smoke and starting probs I was having. There had been no need to alter the injection pump timing at all as it was everything else around it that was going wrong.

I have now had it it done and have just done 1300 miles in it in 4 days and it is running beautifully and I managed to get 35 to the gallon out of it which I was well pleased with.

I think the moral of this story is that when you buy one of these motors and you are told the timing belt was only replaced a few tousahd miles ago, ignore it and have peace of mind and get it done yourself. I was very close to seriuosly damaging my engine!!!