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23-07-2012, 07:37 PM
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Part of the Furniture
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Cant seem to get fuel to the injectors. I have changed the pump and I know I am getting pressure to fuel filter. I have recently changed the head and since then I had it running for about 30 seconds before I switched it off as it was making a horrible sound. Just done a compression test and cylinder 4 isn't even getting to 50 psi. Could this explain the lack of fuel to injectors.
30-07-2012, 10:48 PM
#2
Compression has nothing to do with the amount of fuel that is run to the engine. The metering head controls it.
What you want to do is slightly undo the 4 red hoses that lead from the metering head to the injectors one at a time and see if fuel seeps out of the banjo bolts in metering head when you push the plunger down. You don't need to undo the bolt completely, just undo it a few turns to see if fuel is getting to the metering head and into the pipes that lead to the injectors.
If you have fuel coming out of all of them it could be that your either the injectors have given up or the pipes are a blocked, so the next test you would need to do is undo each injector 1 at a time; the injectors are held on by a 10mm bolt in the sandwich plate.
Remove the injector out of the sandwich plate and have a glass or small bucket handy, keep the injector connected to the red pipe, turn the ignition on and see if fuel squirts out of the injector. if fuel is constantly spraying then you know that injector is fine. Repeat this with 2,3,4 injector.
I had a similar issue and it turned out to be that I had to change 1 of the fuel pipes that was running to the injector was bent, and another injector wasn't working.
Make sure when removing the injector that you are careful not to bend the red fuel pipes as they do not flex they are solid metal pipes. They are delicate, so be gentle!
Its a slow process; you want to be methodical at approaching this, but once you diagnose where the problem is you can sort it easily!
This is purely a test to see where your fuel is and isn't reaching to.
As for you low compression, I think one of the boffins of passionford will have to help you with that as I'm not too sure!
What you want to do is slightly undo the 4 red hoses that lead from the metering head to the injectors one at a time and see if fuel seeps out of the banjo bolts in metering head when you push the plunger down. You don't need to undo the bolt completely, just undo it a few turns to see if fuel is getting to the metering head and into the pipes that lead to the injectors.
If you have fuel coming out of all of them it could be that your either the injectors have given up or the pipes are a blocked, so the next test you would need to do is undo each injector 1 at a time; the injectors are held on by a 10mm bolt in the sandwich plate.
Remove the injector out of the sandwich plate and have a glass or small bucket handy, keep the injector connected to the red pipe, turn the ignition on and see if fuel squirts out of the injector. if fuel is constantly spraying then you know that injector is fine. Repeat this with 2,3,4 injector.
I had a similar issue and it turned out to be that I had to change 1 of the fuel pipes that was running to the injector was bent, and another injector wasn't working.
Make sure when removing the injector that you are careful not to bend the red fuel pipes as they do not flex they are solid metal pipes. They are delicate, so be gentle!
Its a slow process; you want to be methodical at approaching this, but once you diagnose where the problem is you can sort it easily!
This is purely a test to see where your fuel is and isn't reaching to.
As for you low compression, I think one of the boffins of passionford will have to help you with that as I'm not too sure!
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