Happy New Year Cruiser Community!
I'm in need of some fuel delivery advise on my H engine, so I'll try to set up the scenario as quickly as possible:
First, the truck is a bit of a Frankenstein monster--a 4 speed Costa Rican BJ40 with an H engine that has clearly been pieced together on no known Land Cruiser paradigms. I've put in a Wilson switch for the glow plugs, and it works., but I anticipate having to re-wire the whole truck at some point this winter. Suffice it to say that I was misled about the state of the truck when I purchased it; had I known then what I know now, I would not have taken delivery of the vehicle. But I did and now I'm trying to fix some issues as economically as possible, using limited abilities and knowledge (four previous cruisers--73 FJ40, 77 FJ40, 84 BJ60, 90 FJ62)
When the truck was delivered to me, there was no fuel in the tank or the line. I did the standard things--checked the lines, replaced some of the rubber hoses, filled the tank and used the primer pump to get fuel in the line to the filter, etc. Then I changed the filter, filled it with fuel and bled the line until the fuel flowed freely from the bleeder nipple. Then I bled the injection pump and got fuel to all of the injectors by cracking the nuts, hitting the starter for each line until the fuel pimped out with no air. The truck started, but then after approximately two minutes (the time it took the fuel from the filter to burn) the engine sputtered and quit.
Because it appeared that the fuel delivery problem was from the primer pump back (it pushed the fuel from the filter to the injector pump, but did not seem to draw fuel from the tank) I replaced the primer pump with another Bosch unit, replaced the plastic washers on the lines with copper ones, and repeated the process with the same results. So, as far as I can ascertain, the injection pump is pulling fuel from the primary filter (there is no sedimenter in this particular set up, though I would like to install an after market unit), but no fuel is being pulled through the line from the tank. Nevertheless, when I loosen the metal line from the tank on either end--engine side or tank side--fuel flows out, but it appears that primer pump does not efficiently pull fuel from the tank.
Further, when the truck runs for the two minutes it takes to run out of fuel from the filter, it smokes like a mofo. I would think that might be the mark of problematic injectors, injection pump, or just excess carbon buildup, but I can't get it to run long enough to see if it clears up to get a better idea.
So, a couple of questions:
1) Could this be the result of a tired injection pump? (I don't know how many miles it has on it) or fouled injectors?
2) Could the lack of suction in the primer pump be indicative of an air leak somewhere in the fuel line from the primer pump back?
I think my next move is to replace the metal fuel line in case there are any tiny holes in it (there is no apparent fuel leak, but I know that does not preclude air entering the line through holes too small for fuel to leak from).
Any advice would be appreciated. And for the record the conversations on this site are incredibly instructive, even when they are not terribly serious. It's cool to see a group of folks out here as enamored with these truck as I am.
Thanks Ya'll!
I'm in need of some fuel delivery advise on my H engine, so I'll try to set up the scenario as quickly as possible:
First, the truck is a bit of a Frankenstein monster--a 4 speed Costa Rican BJ40 with an H engine that has clearly been pieced together on no known Land Cruiser paradigms. I've put in a Wilson switch for the glow plugs, and it works., but I anticipate having to re-wire the whole truck at some point this winter. Suffice it to say that I was misled about the state of the truck when I purchased it; had I known then what I know now, I would not have taken delivery of the vehicle. But I did and now I'm trying to fix some issues as economically as possible, using limited abilities and knowledge (four previous cruisers--73 FJ40, 77 FJ40, 84 BJ60, 90 FJ62)
When the truck was delivered to me, there was no fuel in the tank or the line. I did the standard things--checked the lines, replaced some of the rubber hoses, filled the tank and used the primer pump to get fuel in the line to the filter, etc. Then I changed the filter, filled it with fuel and bled the line until the fuel flowed freely from the bleeder nipple. Then I bled the injection pump and got fuel to all of the injectors by cracking the nuts, hitting the starter for each line until the fuel pimped out with no air. The truck started, but then after approximately two minutes (the time it took the fuel from the filter to burn) the engine sputtered and quit.
Because it appeared that the fuel delivery problem was from the primer pump back (it pushed the fuel from the filter to the injector pump, but did not seem to draw fuel from the tank) I replaced the primer pump with another Bosch unit, replaced the plastic washers on the lines with copper ones, and repeated the process with the same results. So, as far as I can ascertain, the injection pump is pulling fuel from the primary filter (there is no sedimenter in this particular set up, though I would like to install an after market unit), but no fuel is being pulled through the line from the tank. Nevertheless, when I loosen the metal line from the tank on either end--engine side or tank side--fuel flows out, but it appears that primer pump does not efficiently pull fuel from the tank.
Further, when the truck runs for the two minutes it takes to run out of fuel from the filter, it smokes like a mofo. I would think that might be the mark of problematic injectors, injection pump, or just excess carbon buildup, but I can't get it to run long enough to see if it clears up to get a better idea.
So, a couple of questions:
1) Could this be the result of a tired injection pump? (I don't know how many miles it has on it) or fouled injectors?
2) Could the lack of suction in the primer pump be indicative of an air leak somewhere in the fuel line from the primer pump back?
I think my next move is to replace the metal fuel line in case there are any tiny holes in it (there is no apparent fuel leak, but I know that does not preclude air entering the line through holes too small for fuel to leak from).
Any advice would be appreciated. And for the record the conversations on this site are incredibly instructive, even when they are not terribly serious. It's cool to see a group of folks out here as enamored with these truck as I am.
Thanks Ya'll!
(official Mud salute). try heading here with your diesel questions - it will most likely get more attention
