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- #21
We tried it without the plunger today too. Didn’t change anything.
1HZ to 1HDT swap w/ fuel issues (1 Viewer)
- Thread starter mxtaco48
- Start date
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- #23
Tonight I bypassed the fuel filter. Used a container higher than the fuel supply line and let gravity work. The IP appears to be sucking fuel pretty good. My battery was low at this point so I’m going to try again tomorrow. After a full battery test, I’ll know more about the status of that.
the hand pump is working, at least to an extent.
ive certainly second guessed myself about having them crossed but they’re definitely on right and have been since install.
the hand pump is working, at least to an extent.
ive certainly second guessed myself about having them crossed but they’re definitely on right and have been since install.
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- #24
I’m gonna test that the fuel is getting from the pump to the injectors tomorrow... which was my initial symptom. The batteries were too dead tonight to tell me anything.
If gravity fed fuel is getting through IP and to the injectors then I’ll assume it’s between supply and IP. I couldn’t find anywhere with long enough of clear line to go from fuel filter to IP so I’ll go to some more places tomorrow.
If gravity fed fuel is getting through IP and to the injectors then I’ll assume it’s between supply and IP. I couldn’t find anywhere with long enough of clear line to go from fuel filter to IP so I’ll go to some more places tomorrow.
I would connect your fuel container to the tank side of the filter and run fuel to the IP from there. That would tell you primer and filter are allowing fuel through.
How long has it been driven? Is there any chance the fuel pick up in the tank is covered in junk blocking it?
How long has it been driven? Is there any chance the fuel pick up in the tank is covered in junk blocking it?
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- #26
@roscoFJ73 I was driving the LC up until the week of March 24th. It's been sitting since then. The engine was dry when I installed it, obviously.
I cant imagine any reason it would be covered in any junk. The landcruiser has been relatively clean and in good condition.
I cant imagine any reason it would be covered in any junk. The landcruiser has been relatively clean and in good condition.
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- #27
I worked on it a little more this morning. I set up a gravity feed directly into the IP. It appears to be pulling fuel while cranking but still not getting to the injectors. The fuel also keeps going down after I stop cranking. Since the fuel is not getting to the injectors, I'm guessing it is going to the return line.
This opens up several questions to me:
Is there a reason the fuel would be going to the return instead of the injectors?
Where in the IP would the fuel go to the return instead of the injector?
Could I have a vacuum issue between the IP and tank?
Should I block the return line to see where the fuel goes?
This opens up several questions to me:
Is there a reason the fuel would be going to the return instead of the injectors?
Where in the IP would the fuel go to the return instead of the injector?
Could I have a vacuum issue between the IP and tank?
Should I block the return line to see where the fuel goes?
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Squash
SILVER Star
Have you unscrewed the fuel solenoid?
Pull it and the screen.
Test the solenoid .
Crank with solenoid removed, you should see fuel.
Pull it and the screen.
Test the solenoid .
Crank with solenoid removed, you should see fuel.
Im not sure if this is your problem
There is a pressure relief valve for the fuel return to the tank. I havent seen one malfunction before but this Landrover mechanic has one he is fixing although its on a Bosch VE pump for a landrover.
This valve opens when the fuel pump is pressurised by fuel from the feed pump to the correct psi with the excess being returned to the tank. The extra fuel drawn into the pump keeps it cool and lubricated.
NOTE, this is why I dont think pusher pumps are the answer, the more you pump fuel into the injector low pressure side, the more this valve opens to keep the pressure at the correct psi your pump is designed to operate at.
If you do get results from a pusher pump, its either this part is faulty or the feed pump is worn out (water is their big enemy).
Before touching that, I would do 2 things.
1 undo one of the injector lines at the pump and see if you can get fuel to squirt out the injector valve when cranking.
2 remove the return line and fit a hose of adequate length and put the end into a container and see if fuel is coming out when its cranking.
I was thinking maybe the pressure relief valve is stuck open and sending all the fuel back to the tank. I'm in unknown waters here as I haven't seen one do it before.
If you remove the relief valve I would look at a manual before fitting it back in for proper adjustment
1 undo one of the injector lines at the pump and see if you can get fuel to squirt out the injector valve when cranking.
2 remove the return line and fit a hose of adequate length and put the end into a container and see if fuel is coming out when its cranking.
I was thinking maybe the pressure relief valve is stuck open and sending all the fuel back to the tank. I'm in unknown waters here as I haven't seen one do it before.
If you remove the relief valve I would look at a manual before fitting it back in for proper adjustment
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- #31
I think I'm beyond that point and am just going to pull the IP and send it in for rebuild. I think the IP is where the issue will be.
Squash
SILVER Star
Did you at least pull the solenoid out?
You need to see fuel here. Just worried because at lot of things click when you turn on the key and what you are hearing may not be the solenoid.
You stated that it ran recently.
Remember the solenoid cuts fuel off.
You need to see fuel here. Just worried because at lot of things click when you turn on the key and what you are hearing may not be the solenoid.
You stated that it ran recently.
Remember the solenoid cuts fuel off.
I would at least do those 2 other things I mentioned .
If you do you remove the IP, ask for it to be bench tested before it is disassembled.
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- #35
@roscoFJ73 I did #1. No fuel at injectors
Your second point is interesting because that’s what is happening. The fuel is going back to the return. I dont Know enough about the IPs to know where to pinpoint the problem but I’m going to look at that pressure relief valve now before i remove the pump. Thanks.
Your second point is interesting because that’s what is happening. The fuel is going back to the return. I dont Know enough about the IPs to know where to pinpoint the problem but I’m going to look at that pressure relief valve now before i remove the pump. Thanks.
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- #36
I dont know what the internal pressure is inside the pump body, Im guessing its about the same as the Landrover pump at 100psi. I doubt you could get a 100psi with the hand pump or even a small electric pump. Which further points to it being stuck in the open position.
Did you watch the video? The valve was jammed up from cooking oil and rust.
Did you watch the video? The valve was jammed up from cooking oil and rust.
Squash
SILVER Star
Mmmmm!
Glad you haven't given up yet.
Eagerly awaiting the Eureka moment and rapture of sweet success!
Glad you haven't given up yet.
Eagerly awaiting the Eureka moment and rapture of sweet success!
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- #39
Yes, I watched the video and now lean toward a stuck regulator valve as a strong suspect.
I went Ahead and pulled the IP and shipped it to Pacific Fuel Injection in Oregon. It Should be there Friday. The way I figure Is if the IP is having a gunked up valve at one place, there may be other issues that will come up sooner or later. The seller has offered to cover half the cost of the rebuild so it’s not too bad for my out of pocket.
I cant Give up on it now. I’ve spent too much time on it. I’ll keep updating this thread as this continues on. I hate the threads I was Reading that showed similar symptoms but the OP never reported back as to the fix.
I went Ahead and pulled the IP and shipped it to Pacific Fuel Injection in Oregon. It Should be there Friday. The way I figure Is if the IP is having a gunked up valve at one place, there may be other issues that will come up sooner or later. The seller has offered to cover half the cost of the rebuild so it’s not too bad for my out of pocket.
I cant Give up on it now. I’ve spent too much time on it. I’ll keep updating this thread as this continues on. I hate the threads I was Reading that showed similar symptoms but the OP never reported back as to the fix.
- Thread starter
- #40
Long overdue follow up to this. Once I got The rebuilt IP installed, the engine started right up. That was the main problem, needed a rebuild.
