Post by acy76 on Nov 16, 2005 14:24:27 GMT 11
Hello all -- I'm writing from the USA where I've been busy converting a 1988 Isuzu Trooper to 4JB1-TC intercooled turbo diesel power. I've got a small blog detailing the process here: www.dieseltrooper.blogspot.com
and a thread discussing it over at 4x4wire here: www.4x4wire.com/forums/showflat.php?Cat=&Number=715114&page=0&view=collapsed&sb=5&o=93&fpart=1
Right now, I am trying to figure out where the fuel cut solenoid is located and how it works. I assume it needs constant +12V power to operate. I'll cut and paste my post from 4x4wire below (since this engine was never available in the US, I am hoping someone here will have a better idea of what's going on):
-------------------------------------
My assumptions: that the fuel solenoid is supplied a constant +12V during start or run to hold it open to supply fuel to the pump. This is how it appears to operate after examining the wiring diagrams for the 86 diesel Trooper and the 2000 3.1 diesel Trooper (I haven't got one for the 4JB1-T).
In this photo (also can be seen on the blog) I've noted the two things I thought might be the cutoff solenoid:
The box marked '1' is a cylinder with one wire going to it (with a boot over it; wire & boot removed for photo). There are 3 fuel lines connected to the base of it, one of which is visible. All 3 appear to be return lines - the visible line is the main return to the tank.
The '2' shows the very edge of another booted, one-wire connection underneath the first cylinder. It is located on the top of the part of the pump where the lines come out and go to the injectors.
The wires going to both of these things have continuity with ground. I tested them with a continuity tester and with a test light, and both are grounded. Supplying power to either one results in a direct short. Nothing else on the pump looks like it could be the cutoff solenoid. There is a 2-wire booted connector on the side of the pump, near the engine block, but 1) it has 2 wires and 2) I think it's the tach sensor after looking at a manual (could be wrong).
So, what am I missing? Do either of these look like the solenoid? Should it have continuity with ground? Is it a bad solenoid perhaps? If they're not the solenoid, what are they?
Any and all ideas welcomed. Thanks in advance...
and a thread discussing it over at 4x4wire here: www.4x4wire.com/forums/showflat.php?Cat=&Number=715114&page=0&view=collapsed&sb=5&o=93&fpart=1
Right now, I am trying to figure out where the fuel cut solenoid is located and how it works. I assume it needs constant +12V power to operate. I'll cut and paste my post from 4x4wire below (since this engine was never available in the US, I am hoping someone here will have a better idea of what's going on):
-------------------------------------
My assumptions: that the fuel solenoid is supplied a constant +12V during start or run to hold it open to supply fuel to the pump. This is how it appears to operate after examining the wiring diagrams for the 86 diesel Trooper and the 2000 3.1 diesel Trooper (I haven't got one for the 4JB1-T).
In this photo (also can be seen on the blog) I've noted the two things I thought might be the cutoff solenoid:
The box marked '1' is a cylinder with one wire going to it (with a boot over it; wire & boot removed for photo). There are 3 fuel lines connected to the base of it, one of which is visible. All 3 appear to be return lines - the visible line is the main return to the tank.
The '2' shows the very edge of another booted, one-wire connection underneath the first cylinder. It is located on the top of the part of the pump where the lines come out and go to the injectors.
The wires going to both of these things have continuity with ground. I tested them with a continuity tester and with a test light, and both are grounded. Supplying power to either one results in a direct short. Nothing else on the pump looks like it could be the cutoff solenoid. There is a 2-wire booted connector on the side of the pump, near the engine block, but 1) it has 2 wires and 2) I think it's the tach sensor after looking at a manual (could be wrong).
So, what am I missing? Do either of these look like the solenoid? Should it have continuity with ground? Is it a bad solenoid perhaps? If they're not the solenoid, what are they?
Any and all ideas welcomed. Thanks in advance...
