Fuel injectors

Hi, 
Could anyone tell me other than the cold start injector is there any electrical  reason that fuel isn't going to the other 4 injectors ???

Have you just rebuild the injection system,the reason I ask is,when I started my car after fitting new tank to metering head pipes, I had an air lock which stopped the petrol getting to the injectors, I had to short the pump relay to get the pump running constantly,I then loosen one injector and lifted the flap in th the metering head by hand, you can pull an injector out and put it in a jar to see it work,also I don't think the cold start injector stop the fuel going to the injectors, it just injects extra fuel into the manifold

Cheers kirk27,
I think I'm sorted pulled out all four injectors today and there busted not a spec of spray coming from any of them so need replacing. Cheers 👍

Are you sure the injectors are the problem - the fuel may not be reaching them if there is a problem further back in the system, especially the metering head or the WUR. The fifth injector can still work and briefly fire the engine, even if there is a fault with the metering head or the control pressures are wrong (WUR). There are plenty of howto threads on testing the fuel system.

Hi Leo,
Yeah sure it's the injectors took all 4 out and there dry as a bone put them in plastic bottles and turned it over but not a bit of spray when I took the fuel line off them they all had fuel on the top of the injector so I guess it's 4 new ones. After all the car has been in storage for 17 years.

you really should find out why they're all not working. If its been stood that long it could be muck in the fuel which will cause all sorts of issues - not just with the injectors.
There's nothing really in them to go wrong as they are purely mechanical. For all four to be down smells of other issues.They won''t open until about 60psi of fuel pressure so have you got that?
The 5th injector relies on an electrical coil to open so will still fire fuel at a lot lower pressure than the main injectors.

Hi yomp,
I guess it is muck and dirt that was in the fuel. I cleaned out the fuel tank I also replaced the pump and the filter the pressure seems to be ok but not sure how to measure psi on the fuel. I was going to try run the pump with the injectors off just to make sure the fuel is clean before putting on new ones would you advise this ?

I recently went through all of my fuel system because of the issues you have. Have you cleaned all of the fuel system components? I replaced all my injectors and the fuel distributer but I removed everything and cleaned it with carb cleaner and blew it out with an air line before putting the new injectors on. I'm out at the moment but when I'm home later I'll have a look through the manual to jog my memory of everything I did! You don't really want to ruin a set of brand new injectors by washing s@@@@y fuel into them! I take it you have fuel at the FD!

Cheers  saulty
I have fuel all the way to the end of the braided fuel lines. I just guessed that the injectors where the problem. But yomp has me thinking again said there should be about 60 psi but I have no way to measure psi. The new injectors are on the way in the post I agree I don't want to put dirty fuel through but today I put all the lines into a container and turned the ignition on and off a few times and then lifted the flap in the injection unit and the fuel ran clear and clean so I'm just hoping it is the injectors and I do have the pressure. I also put a bottle of injection cleaner into the fuel tank and there's a new pump and filter. I was reading up and some people take out the relay and cross port 30 and 83 to run the pump I may do this to flush more fuel through but I think it's as clean as I can possibly get it. Just hope she'll start up with new injectors.

I stripped and cleaned all the braided lines, wur, fuel distributor etc (anything that fuel flows through) and replaced the fuel filter! I checked to see if I had fuel to the injectors and I did so I checked the injectors. I only had one that had failed completely and 2 that had a poor spray pattern and leaked after I released the plate in the metering head and one that worked ok. I took the relay out and replaced it with the relay next to it for the testing, this energises the fuel pump continuously so that you can run all the tests! I did get an air line and blew through the failed injectors but it did very little but you could try it just to see it the injectors do anything. I also did quantity tests on the injectors with them spraying into baby bottles, that was how I figured my FD was faulty as I had one cylinder that was always down on quantity! It's not much point trying to do too much without have the fuel pump running continuously though so I would swap the relay over before checking quants etc!
Good luck.

Ok I think I'll have to try the baby bottles when I get my new injectors good thinking easy to measure with the markings. Is it the relaying pointing to in the pic you used because you have to turn it around in order for it to fit is it safe to do this ? I'm told to cross over the two big slots on relay 2 and maybe hook up a 10amp fuse just in case

I'm pretty sure that grey relay is the one I fitted. If you take it out it will have two big pins on in the same position as the big ones on the fuel pump relay but it has a few small pins missing but it will fit straight in. It does the same as bridging the two pig slots, I don't think you need to fuse it as (I think) there is a fuse in the fuse box for the fuel pump . Go careful doing this though as the fuel pump runs continuously, fine for diagnostics but not good for driving!

No doesn't fit straight in I have to turn this one in order for it to fit that's why not sure about using this one

Out of interest did you try and run it before cleaning out the system?
A common mistake people make when recommissioning these cars is they put a battery on and a gallon of fuel in and try and run it.
Many cars suffered the fuel filler neck rotting syndrome and the moisture that got in the tank back then has been slowly eating away at the fuel system over time and all that happens when trying to run it is it fills the sensitive parts up with all the gathered muck / rust.
You never mentioned muck to begin with so I'm guessing muck has reached the injectors so maybe not a pressure problem.

Yeah your right tired to turn it over    but the only saving grace is the pump wasn't working so that's when I started cleaning tank etc

Yes you have to turn the relay to fit it in the fuel pump slot.
The relay trick is better than just bridging the 2 bigger sockets with a wire as that will make the fuel pump even with the ignition off, I know this as my fuel pump relay failed on the way home one and I only had a bit of wire in the car but it worked and got me home, I just used a thick bit of wire I had knocking about in the car.

Thanks guys for all the help and info got her running today after 17 years

Good to hear it run.  
When are you hoping to get it on the road?

Hi mark 1gls,
Well when i went to put in gear clutch was stuck so I only got that sorted tonight it wasn't to bad I thought it was going to be a nightmare but all good now. I guess the problems start now ! It's running good now but the latest thing is that it's running very hot. I flushed out the water system with a wash had the heater on new water pump and thermostat and have coolant in it now but temp pin goes up to about 3/4 not sitting 1/2 way the fan is kicking in and out ok but I just think she's running to hot any advice ? As to when I'm getting it on the road well not sure if I'm going to tax and insurer this year but I think I'll have to take it for a short run down the road   

Glad to hear you've got it running, it sounds quite sweet as well! As for the engine temperature, I think mine sits around 2/3 or 3/4 mark when it's running on the drive even though the fan kicks in and out. I don't think you have a major issue there. 
The fun is about to begin though, have you gone through the braking system etc yet?
Good luck with it.👍🏻
Where abouts in Ireland are you?