Back again for some more help. I had a rush of blood to the head, and changed the oil, and also the fuel filter on my 1900 diesel pickup. It was running well before i did this. I did not fill the new fuel filter to prime it, when i changed it. This made starting it after the change a nightmare., but with the help of a jump start and some bleeding it started.

My problem is. Now after the engine is hot, and has been in traffic for a while, as i pull away the engine fades a bit, like its going to stall. I can accelerate out of it, and at any speed over about 20 mph there is no sign of it. Has any one got any ideas??

Can you give me some details on which system is used and then i'll see what i can find out. I should imagine its a Bosch system but i need some more specific details if poss, or does anyone else know the details of the system:)

I will check it out. I noticed one of the hoses that link the top of the injectors has a small split in it, and is weeping slightly. I went and got a kit to replace them this morning. Maybe that will help? cant do any harm! Also some jubilee clips to replace the crimp type things that attach the hoses to the fuel filter. It says in the workshop manual they are not realy meant to be reused. When i am out there in the drizzle, i will try and look for the name of the system.... Thanks

Just one more thing. I have also noticed, looking at the engine from the front. There is a sensor, of some sort that sticks out the side of the head, on the right. This looks like it is leaking engine oil. I thought at first the oil was coming from the rocker cover, but it not. Can i just take this out and re seal it?

Here i go again!! Just wondered if you had any thought on trying a dose of one of the diesel additives/injector cleaners? Worth it? not worth it? Or am i being taken in by all those colored bottles in the accessory shop?!!

Just one more thing. I have also noticed, looking at the engine from the front. There is a sensor, of some sort that sticks out the side of the head, on the right. This looks like it is leaking engine oil. I thought at first the oil was coming from the rocker cover, but it not. Can i just take this out and re seal it?

pic would be handy, if it's a 4pin sensor, that's the coolant sensor, but they are normally by the number 4 injector

The Pump is made by Lucas.?? The sensor looks like it is screwed in to the head and has a single wire coming from it. Right. I have replaced all the small tubes that come from the top of the injectors, replaced the crimp clips on the fuel filter, and taken her out for a test run. everything is back as it was before i put the new filter on. But the problem is still there. Seems ok when its cold, and still fine when the car is up to working temp, 60 70 MPH still fine. But if i let the temp go above half way on the gauge. About 80 or 90 degrees i would say, going by the numbers on the gauge. ( I get to this temperature by sitting and idling) Pull away from there, and as you are about to get to second gear, the engine fades away, put your foot down, and its fine again!! Hope that lot makes sense!!!

If its happening as you change into second it sounds like a low pressure supply problem or restriction, the acceleration in first uses up the supply and as you change gear the supply is almost gone when you lift off and reapply the throttle the lift pump inside the pump is relieved momentarily and is able to re supply fuel and the continued revs help to overcome the blockage.While its been at idle the pump is not sucking enough fuel If the fuel filter was a good quality or oe filter i would suspect maybe a blocked filter where the pipe from the filter housing goes into the pump. Undo the banjo and clean the small filter out if fitted and refit pipe. Do you have any starting issues ie. does it take a long time to start in the morning, if not i don't suspect any air leaks in the system just a blockage.

Just a tip when replacing the filter once you have fitted the new one use a hand suction pump on the outlet pipe (the one that feeds the pump) on the filter housing until fresh deisel comes out then refit the pipe and this should help alleviate difficult starting after a filter change.

No starting problems, in fact it has been better since i changed the filter. The fuel filter was made by Fram i think , not sure now as i have binned the box. all what you said above is a bit technical Ted for me!!! I will have to read it through a couple of times to get my head around it. Lost me a bit where you said blocked filter? is there more than one filter? You said undo the banjo and clean the small filter out, dont think i have got one of them, just the canister sort with four pipes on top. I am realy tempted by this injector cleaner stuff, I have looked back through some old threads, and its worked for some others. Cant hurt can it?

the sensor with the single wire is the oil pressure switch

the sensor with the single wire is the oil pressure switch

Thanks for that, can i just take this switch out and put a new washer on it to stop it leaking?

If its happening as you change into second it sounds like a low pressure supply problem or restriction, the acceleration in first uses up the supply and as you change gear the supply is almost gone when you lift off and reapply the throttle the lift pump inside the pump is relieved momentarily and is able to re supply fuel and the continued revs help to overcome the blockage.While its been at idle the pump is not sucking enough fuel If the fuel filter was a good quality or oe filter i would suspect maybe a blocked filter where the pipe from the filter housing goes into the pump. Undo the banjo and clean the small filter out if fitted and refit pipe. Do you have any starting issues ie. does it take a long time to start in the morning, if not i don't suspect any air leaks in the system just a blockage.

Just a tip when replacing the filter once you have fitted the new one use a hand suction pump on the outlet pipe (the one that feeds the pump) on the filter housing until fresh deisel comes out then refit the pipe and this should help alleviate difficult starting after a filter change.

Right. I have got it now! The other filter is a gauze type inside the banjo? I will have a look at that this afternoon. Will i have trouble starting after i have split the banjo joint? I only wondered, as you put the tip for drawing fuel!!! Is It likely to be a bitch to start?

Thanks for that, can i just take this switch out and put a new washer on it to stop it leaking?

iirc they don't have a have a washer:confused:

they only cost about £3 new from german and swedish, but make a note of the colour (or operating pressure) before you order one, it's written on the underside of the nut... there are a few different types

iirc they don't have a have a washer:confused:

they only cost about £3 new from german and swedish, but make a note of the colour (or operating pressure) before you order one, it's written on the underside of the nut... there are a few different types

Thanks again for your help. I will get one. I Think i will invest in a rocker gasket while i am there, I am still not sure where the leak is, and as they are not bank breakers, i will splash out.

Had a go at splitting the banjo joint, sadly no filter in it. It all looked clean inside but i gave it a blow through. It was not too happy to start, but went after a bit of cranking. Went out and test drove it, but as a feared no change. Its just a case of working back from the pump to the filter now, cleaning and blowing the tubes out as i go. Does that make sense?

I had a alternator belt fitted this morning and the mechanic noticed a small tube had fallen off from what i think is some sort of advance and retard mechanism. This was refitted, and i am hoping this may have been the cause of the misfire problem. I have not had time to try it yet, but it seems likely as i may have hit it off when i bled the fuel system after installing the new filter. I hope so anyway.

yeah that's probably the vacuum operated fuel timing advance mechanism

I had my head under the bonnet today. and as i was revving the engine, the plunger on this vacuum thing was going in and out like a fiddlers elbow and making quite a clunk as it did. Is that right? i have never noticed it doing it before!! mind you, i spend as little time under bonnets as i possibly can.

my1.9D estate is having a really similar problem - feels like a sudden fuel starve- can also happen sometimes at 70/80mph... but mostly on roundabouts or just accelerating from start when i've used too much welly in first gear.. after the starve it's as if the blockage clears and there's a huge (and often unwanted, even dangerous) push of power as all the fuel comes through! Oh and it's become a total sod to start in the cold too.

so from what i can gather on this forum there's a vacuum operated fuel timing advance mechanism, some kind of mechanical idle speed boost mechanism, and presumably the mechanical accelerator mechanism - sheesh will have to check these out. Filter has been replaced pretty recently.

a while ago the little cover on the last injector return pipe nipple broke, letting the system squirt fuel everywhere - this is currently wearing a piece of rubber pipe with a screw in the end to plug it. could this be knackering my fuel system somehow, or could it have got knackered when it was doing its squirting?

I don't know much about diesels, or petrols...