Hi from Everett

[12V93]

Welcome. That's one sexy Samurai you got there.

Which one?
They are all gone, now I have an 84 Toy Xtra cab.
In the process of wiring up a 3RZ (2.7 out of a Taco).
If it's the short grey/black one thanks, we had alot of fun togeather before I sold her.

Toyotas are fun. lol And yea I'm pretty sure is was that grey/black one.

After the last roll over it changed alot, once I started removing damaged sheet metal I found alot of cool ways to beef it up and keep it stockish looking to most people.

[RCCUMMINS89]

Well..... I don't believe that's what it is, but if by chance there is only 11.5 (or whatever) volts to the fuel shut off solenoid, it might be fluttering or not keeping it open all the way.

Worth a shot due to it being an easy check.

The fuel shut off solenoid (fss) is on the mid/top part of the pump just above the injection lines.........there will be a wire going to it, with the key on check the voltage to that wire.


If it isn't any of the above, then it pretty much has to be in the injection pump or the injectors. If it is of course not sucking air in anywhere.

[12V93]

Well..... I don't believe that's what it is, but if by chance there is only 11.5 (or whatever) volts to the fuel shut off solenoid, it might be fluttering or not keeping it open all the way.

Worth a shot due to it being an easy check.

The fuel shut off solenoid (fss) is on the mid/top part of the pump just above the injection lines.........there will be a wire going to it, with the key on check the voltage to that wire.


If it isn't any of the above, then it pretty much has to be in the injection pump or the injectors. If it is of course not sucking air in anywhere.

Tested the fss and got 11.88 to 11.89. What should it be getting?
That is if I tested the right connecter.... Right about were the fuel lines coming out of the pump?
If thats it mine has two wires connected to the post on top.
Looks almost like a oil pressure sending unit ( from the top) except with a threaded stud instead coming out the top.
Not anything like the 2nd 12V (per the manual anyway).

[RCCUMMINS89]

I've always thought it needed 12+

I could be wrong though, my mess is gutted.

[RCCUMMINS89]

Some of our trucks have 1 wire to the fss, others have 2. Yours is I/c and therefore gets 2, IIRC

[12V93]

I've always thought it needed 12+

I could be wrong though, my mess is gutted.

Reading the 94 and up manual (the two pumps are different) it states that the PSS controls a lever.
Mine does not seam to be moving, I do have a three wire plug at the very top of the pump?
It gets readings in two of the three wires with nothing on the third.
When the engine is cranked I get something in the third wire.
I am going to try and order a manual today or tomorrow as the adjustment and the location of the relay are different.
Not sure about the readings, going to look it up on this manual to see what the 94 should be getting.
But it looks to be parts of the problem.

[RCCUMMINS89]

The 3 wire doo hicky is your throttle position sensor.

[12V93]

The 3 wire doo hicky is your throttle position sensor.

Ok cool, but shouldn't the injection pump lever move as described in the manual ( wrong year, principal is thensame)?
Mine is not moving, anyone have a picture from the manual they caan loan me till mine gets here?
I need enough info to diagnose FSS. I figure I should address that first (before pulling injectors or working on the pump). Also can any one tell me what I should get for a reading ( as the 94 and newer has a three wire set up)?
Thanks for all the input so far. If yes you ca e-mail it to me greysami@yahoo.com thanks

[ihredneck]

The pumps are different. The VE which you have is a rotary and the shut off solenoid is a plunger style. When electricity is disconnected, the plunger drops...shutting the the fuel off while on the p7100 the plunger moves a lever acting similar to the old tractor's shut off cable. I haven't tried it, but on my 82 VW truck, I can pull the solenoid assembly and grab the plunger out and run the motor but can't shut it off using the key (stall it using a high tranny gear) but that's one way you could check though I think you said you had a auto...hard to kill the motor then lol!

[12V93]

The pumps are different. The VE which you have is a rotary and the shut off solenoid is a plunger style. When electricity is disconnected, the plunger drops...shutting the the fuel off while on the p7100 the plunger moves a lever acting similar to the old tractor's shut off cable. I haven't tried it, but on my 82 VW truck, I can pull the solenoid assembly and grab the plunger out and run the motor but can't shut it off using the key (stall it using a high tranny gear) but that's one way you could check though I think you said you had a auto...hard to kill the motor then lol!

So is their a way to visually tell if the FSS is working (like on the newer style pumps)? Or did I just get off on a tangent

[BC847]

The pumps are different. The VE which you have is a rotary and the shut off solenoid is a plunger style. When electricity is disconnected, the plunger drops...shutting the the fuel off

[ihredneck]

So is their a way to visually tell if the FSS is working (like on the newer style pumps)? Or did I just get off on a tangent

The diagram shows a mechanical fuel shutoff, so it looks like if you pull the electric fuel shut off, pull the plunger out and then reinstall you can run the truck to see if it's any better. Then use the mechanical fuel shutoff to kill the engine after the test.

But if I am correct, I believe these solenoids are a open/close type and have no variability...but I may be wrong, never tested to find out.

Give it a whirl and see what you find

[12V93]

So is their a way to visually tell if the FSS is working (like on the newer style pumps)? Or did I just get off on a tangent

The diagram shows a mechanical fuel shutoff, so it looks like if you pull the electric fuel shut off, pull the plunger out and then reinstall you can run the truck to see if it's any better. Then use the mechanical fuel shutoff to kill the engine after the test.

But if I am correct, I believe these solenoids are a open/close type and have no variability...but I may be wrong, never tested to find out.

Give it a whirl and see what you find

Sounds like a plan, I was plannin on trying that next.
I had planed on doing it Saturday afternoon but my wife grabbed me on the way out to the shop and asked me to fix the fridge (leaking water all over the floor, defrost drain was froze up).
I am not sure what it takes to remove the plunger, guess I will figure that out after I get it out. I was looking for bench testing information ..... but did not find anything. But (depending on design) it could be a variable (open/close X%) vs strickly open/shut. But I don't know for sure. Guess I will find out more this afternoon. Thanks for the input

[RCCUMMINS89]

It's either open or close.

HOWEVER if the voltage is not high enough it can cause it to open and close very quickly..........causing issues.

Just run 12+ volts straight to it and see if it fixes the problem.

[rockbuggy4x4]

I'm just gonna derail this thread quickly wit a newbie question. Lol. Whats the name of the black thing thats hanging off the side of the pump?