Td4 no fuel out of injector

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Freeelander

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Tyne and wear
Hi. Was wondering if anyone had any advice on no fuel coming through the injectors on a freelander 1 td4 please. Fuel to the injector, but not through to the injector nozzle.
Long story, injectors were leaking back causing trouble starting, but did start and work, so I decided to try and refurbish the injectors ( This could be the problem and probably most likely, that I have broke the injectors) anyhow, if it’s not the injectors, what else might cause this. Fuel pressure sensor? Injector wiring etc.? Thanks for any advice or electrics I can check.? Etc
 
Do you have any diagnostics capable of reading the common rail fuel pressure? This would give you an indication of the condition of the high pressure pump and the fuel rail pressure sensor, at least. And are you getting lots of leakback now, to indicate the fuel is making it as far as the injectors, but no further? It seems more likely that something caused a single point of failure in common for all of the injectors than you have scrambled all of them, but that could still be the case. Checks on the harness and the injector control unit are needed.
 
paul99 said:
Do you have any diagnostics capable of reading the common rail fuel pressure? This would give you an indication of the condition of the high pressure pump and the fuel rail pressure sensor, at least. And are you getting lots of leakback now, to indicate the fuel is making it as far as the injectors, but no further? It seems more likely that something caused a single point of failure in common for all of the injectors than you have scrambled all of them, but that could still be the case. Checks on the harness and the injector control unit are needed.
Click to expand...
 
Hi. Thanks for your quick response. I was also thinking that it could be unlikely to ruin all 4 injectors. I’m going to give any suggestions a look at. I don’t have any diagnostics equipment but will look in to finding some. After failing to start after injector refurb, I have got the injectors connected up out of the head/ under the bonnet to observe the spray- there is none. But when disconnecting them, there is diesel at the head. It’s also possible that wiring may have been damaged. Thanks for your input, I will research the advice and have a go. It will probably be worth paying an injector specialist to check an injector works, or obtain a known good injector to rule out the injectors themselves. ( I’m just a bit tight when the freelanders so old and on its last legs)
 
paul99 said:
If it wasn't for this bloody virus I could have given you a hand, or at least let you use the diagnostic. Same county, at least.
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Ha. That’s just too good of you. I wouldn’t be expecting anything like that anyway. just gonna try and get my head round it if possible and think best way to attack it. If it wasn’t for this virus I wouldn’t even be looking at the motor just now anyway Ha.
I was just after Any advice, like you’ve given and I’ll have a little dabble while I can. Much appreciated. Cheers
 
Does your Freelander, by any chance, have TWO fuel rail pressure sensor plugs? Apparently, some of them do, after a modification. If yours does, then you may have the wrong one plugged in. The modification was to do with failures in the connector to the sensor, as far as I can tell. The connector often corrodes and fails to pass a signal to the engine, and the wires are also known to break in the harness.
 
paul99 said:
Does your Freelander, by any chance, have TWO fuel rail pressure sensor plugs? Apparently, some of them do, after a modification. If yours does, then you may have the wrong one plugged in. The modification was to do with failures in the connector to the sensor, as far as I can tell. The connector often corrodes and fails to pass a signal to the engine, and the wires are also known to break in the harness.
Click to expand...
I’m pretty sure it doesn’t have 2 fuel rail pressure sensors, however I’m definitely suspecting that harness could be a factor. Any idea what I’m checking with a multimeter to test that plug or sensor? One of the wires IS knicked and if I knew what I was doing, I suspect it easy enough to test. Cheers
 
At a guess, I'd think you would need to see a ground, a 12 volt feed and a 5 volt signal line, but I don't have my Haynes book to hand to check. The wire being damaged will let moisture in and could mean corrosion has its evil way with your harness and interferes with the signals.
 
When you refurbed your injectors, did you strip them down? if so are you sure you didn't inadvertently lose the tiny metal shim disc that sits in the metal bit that sits on top of the spring. I stripped mine down after they were not spraying properly, nearly lost the disc. After a good squirt of carb cleaner followed by brake cleaner, they work a treat. I inadvertently put the injector clamps upsidedown when refitting, and of course it wouldnt start. When I corrected this they all work like a dream. Theres an excellent you tube vid here -
 
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