Graemed72
Free Member
- Nov 8, 2020
- 3
- 20
- Funster No
- 77,536
- MH
- Hymer B694
- Exp
- 1980
Hi, I decided to join this group as I have problems with my Nemesis. My Dads Fiat Ducato based Hymer 6 wheeler B694. I have worked on vehicles since I was 3 years old. Out the back of the garden with my dad fixing his cars, being shown what is what. Till I did my training at college and passed my B-tec in motor vehicle technology, and city and guilds in panel beating and painting. I tried to find the find of the that was having problems with the red injector light coming up on his dash on his B544. The nemesis also suffered this problem. And so I thought I'd join this group to pass on a bit of my knowledge and try help if I can. At the moment the nemesis is up on axle stands again having the gearbox taken out to replace the clutch in it. I have not long replace all the brake lines, brake shoes, drums and cylinders and ABS pump. Which you can't find for love nor money! I did find one in the end. Which the vendor kindly put graphite paste in, which I found, only because I took the pump apart because I knew what the problem was with the original pump. So I found the graphite paste, washed it out and sealed the pump up properly, which the original pump failed by. So! The red injector light on the dash. Not many people know that fiat Ducato's have 2 diesel pumps, the high pressure pump on the front of the engine. Which is a mechanical pump. And a pump in the diesel tank. The pump in the diesel tank is not called a diesel pump. It is a diesel pump module that also carries the fuel level sender unit that let you know how much fuel is in the tank. I read up a lot about what people have done and got there mechanics to do. Involving adding wires to the ECU, from the throttle. The module is a simple part to replace. Back in the days of old, diesel engines had to be primed. Using a manual pump to pump fuel up to the filter, then onto the pump and then the injectors. Cracking the respective bleed bolts open to expell the trapped air. Roll on the years and now diesel engines have been fitted with an electric pump, that lifts the fuel from the tank up the filter and then the high pressure pump. High pressure pumps are good at compressing and forcing fuel to the injectors or common rail. But they can't suck very well. So the electric pump does that for the high pressure pump. Down on the floor, I will base this on a left hand drive vehicle, because the nemesis is LHD. And many hymers are LHD, and you will know what side of the vehicle I am talking about. Down on the floor under the carpets, if you pull the carpets up, you will find a rubber patch/grommet. Pull it out, there is a metal patch with about 6 screws securing it. Undo all the screws and you will get to the top of the fuel tank, where the fuel pipes are attached, and the wire connector block. Remove the pipe and block and undo the screws and that is the fuel pump module, ready to lift out. Now you could perform all sorts of tests and functions on it. But! For piece of mind, go onto Ebay, type in fiat ducato fuel pump module in. They are all pretty much the same, chose the price you want to pay, make sure it is the one that fits your ducato. You will see what i mean. Upon delivery, reverse what you did to take it out, to put it back in, and you should have a cure to your red injector light problem. I am just about to go outside this fine remembrance sunday, and put a new one in the tank of the nemesis. As I got one from a scrap yard last time and it hasn't lasted. Along with dropping the gearbox out for the new clutch. I know this is long winded. But then all good knowledge is. I hope this helps you all when the time comes. I am not sure if it is dirty diesel, an old fuel relay that causes the pump to burn out, or the fuel pressure regulator. I have changed the fuel pressure regulator on the nemesis. And I don't know the state of the scrap yard pump. I could not find a new pump at the time because I did not know that they call them 'fuel pump modules' and not just fuel pumps. I hope this helps those that need this help.