fuel pump 2l-2 wiring and solenoid leak

[rfwj]

I could use some help with the wiring on a 1993 2l-2 fuel pump. I basically had a leak from where the fuel solenoid screws in on the pump. Serious leak. So I order a new solenoid. I put the new one in with the inner and outer O ring. It did not work as no fuel was getting through the pump (I guess). Then we removed the small inner ring on the brass nipple tube and it started but still leaked. we checked carefully to see if any old O rings were left behind. My Mechanic says no.

I could use some advice on how to trouble shoot. Does the solenoid open when 12 volts engage from the ignition. We cant figure out why it would not open with the inner o ring. But it does open or work when the inner o ring is removed. Does that prevent a ground when the inner o ring is on the solenoid?

Maybe a link to the wiring for the fuel pump would help.

Sorry for the long message. thanks

 

[Dprio34]

So you have a 2lT-II? or a 2L-TE?

The Injection Pump is leaking or the solenoid is leaking?

 

[rfwj]

it is leaking from where the solenoid screws into the pump when the inner o ring is not on the solenoid (then it will run). It does not leak when the inner o ring is on the new solenoid (both new and old). However, when the inner o ring is on the solenoid, then the truck will not start or run. It is like the solenoid does not work or engage when the inner O ring is on the brass nipple type tube thing. I think it pops in and out when engaged. stopping and letting fuel through.

It is a head scratcher to my mechanic who works on large semi's. Just trying to figure it out. I think the solenoid engages when the O rings is off. and does not when the o ring is there?

It has 12 V running to the top

 

[rfwj]

to be clear, the leak goes away when the solenoid is in place with both the inner and outer o rings.

 

[GTSSportCoupe]

I just rebuilt one of these pumps with all new seals for a friend. Now I'm wishing I'd taken pictures, as it worked fine and had no leaks after.

 

[kbushnz]

Does this pic help, only shows one oring....INJECTION PUMP BODY[ ILLUST NO. 2 OF 2(9001-9501)2LT ] TOYOTA LAND CRUISER [BJ73,LJ7#,RJ7#,HZJ7#,PZJ7#,KZJ7#] (EUROPE)

 

[kbushnz]

haven't pulled mine apart but the seal seats at the base...

 

[rfwj]

Maybe some teflon tape on the threads? it did come with two o rings, but the original had only the one on the base shown.

 

[GTSSportCoupe]

Maybe some teflon tape on the threads? it did come with two o rings, but the original had only the one on the base shown.

kbushnz's picture above is what I remember seeing now. Does the o-ring you have look like that? If not, buy an o-ring kit, or go to an industrial supply place and buy just the one o-ring that is right. Make sure that the seat inside the pump is perfectly clean where the o-ring sits. Actually, it's critical that no debris whatsoever gets into the pump anyhow. I agree that there should be only one o-ring in there.

 

[rfwj]

thanks for all help. i will try on friday

 

[rfwj]

We looked at the solenoid and I think (based on the schematic which is hugely helpful) that we need to check the FILTER SUB-ASSY where the plunger goes in and the rubber WASHER(FOR SWIVEL NIPPLE).

Can you get that out through the solenoid or di you have to take the pump apart?

thanks

rich

 

[GTSSportCoupe]

We looked at the solenoid and I think (based on the schematic which is hugely helpful) that we need to check the FILTER SUB-ASSY where the plunger goes in and the rubber WASHER(FOR SWIVEL NIPPLE).

Can you get that out through the solenoid or di you have to take the pump apart?

thanks

rich

The filter comes out from the solenoid hole. Clean it very carefully in clean diesel. Look for any metal bits in it. And again, make sure not even a spec of dirt gets in there. Use some fine tweezers to lift the filter basket out.

 

[rfwj]

thanks. Looks like I will have to try that on Tuesday afternoon.

 

[Hilixsurf93bigb]

Hey y'all, I didn't get much of a response from anyone on my other thread n I'm in need of some 2LT2 Expertise. plz help guys. My dumb 25 year old ass has spent over 7k CAD on this truck (93 Hilux surf, came with a 2LTE that was blown up after Chinese head replacement) and have been wrenchin for weeks, only to have it not start PLZ HELP.


I've got the engine in the truck and I modified the harness so that everything plugs in. However I've noticed some differences in my engine. Compared to the 2LTE that was in it, first off mechanical injection pump and alot of stuff is either missing or has been intentionally deleted. The EGR has been removed and blocked off, there are no butterfly valves in the intake, there is just a solid spacer on the intake manifold where there would be a butterfly valve for the EGR system.

The injection pump itself does not have the ASDC or w.e it's called, ( the thing that has coolant lines running to it ) neither does it have any EGR stuff on it. It has one boost compensator on the top with a vacum line going nowhere. I can't seem to make sence of the vacum lines either, the EGR us not there anymore and I'm struggling to understand where this compensator would get either boost/vacum that it needs.


The injection pump itself has only 2 connectors, one is a 1 pin, and the other is 2 pin. I have no idea what these are for. Some sort of fuel cut and spill valve connectors? The harness has a 2 wire section that the previous owner has cut off and one of the wires goes to the single pin connector on the injection pump. The other has just been cut and goes nowhere kinda dangles in the wind.

There are a few other connectors that I've found homes for on the deleted EGR stuff.

Basically every plug in for a connector that the engine physically has on it, has been plugged in .


Went to try and start the truck and nothing. It cranks and cranks and cranks but no sign of firing. See white smoke seeping out of the exhaust but just barely, seems like my engines not getting any fuel. It has good compression.


Im stumped as to why or which wires go where and im having alot of trouble finding info on the wires that go to the injection pump.

ANY HELP WOULD BE APPRECIATED.

Also if this thread would be better suited somewhere else please let me know or link the thread , thank-you everyone for taking the time to read this essay lol.

 

[Dprio34]

@Hilixsurf93bigb, I went down a similar road. If the engine has good compression and is in overall condition, you will get through this.
If you are sure the Injection pump is in good order, have you cracked all 4 fuel lines at the head? Crank it a few seconds, and verify fuel is coming out. Tighten up each fuel line as fuel begins to come out at each line. I would start there.

Vacuum lines from Intake Manifold to Injection Pump should be 3.5mm. It wouldn't hurt to run new ones, but I would bleed the diesel lines first.

Post some pics if you like. It may help members help you.

 

[Hilixsurf93bigb]

@Hilixsurf93bigb, I went down a similar road. If the engine has good compression and is in overall condition, you will get through this.
If you are sure the Injection pump is in good order, have you cracked all 4 fuel lines at the head? Crank it a few seconds, and verify fuel is coming out. Tighten up each fuel line as fuel begins to come out at each line. I would start there.

Vacuum lines from Intake Manifold to Injection Pump should be 3.5mm. It wouldn't hurt to run new ones, but I would bleed the diesel lines first.

Post some pics if you like. It may help members help you.

Tha kyou so much I appreciate the input, I did end up getting it fired up, however I've been told to stick to my original post thread so if you could follow and assist me there I'd reallllyuyy appreciate it