40 series general tech and classifieds

[FJ60Cam]

Gonna check timing with a light and check fuel pressure. Cam said the supplied fuel pump might have to much pressure. But it is sweet to crank on first try

I'm thinking you don't have enough fuel pressure, that happened to me. I was fine thru 2nd gear then it went to s***.

I'm pretty sure Todd's issue is timing. Mainly 'cuz he hasn't put a light on it yet.

What pump were you using originally Mr.Vicegrips? And what did you end up with? The only pump for sell on the AFI site is rated at "over 70psi", when tbi's call for somewhere in the 11-13 range.

I swapped over to a Walbro 15 psi pump (recommended for tbi) for noise reasons (this Walbro is silent) and it doesn't run out of steam, even at highway speeds.

Another reason I switched pumps is 'cuz I was having some issues on steep hills with gas leaking out of the tbi and flooding it out. My thinking was that the 70 psi was too much for the internal pressure regulator to handle and it was finding it's way out. I also put in a new pressure regulator rubber thingy and tightened all the screws. I haven't had a chance to see if this fixes it yet.

 

[jrob]

I'm pretty sure Todd's issue is timing. Mainly 'cuz he hasn't put a light on it yet.

What pump were you using originally Mr.Vicegrips? And what did you end up with? The only pump for sell on the AFI site is rated at "over 70psi", when tbi's call for somewhere in the 11-13 range.

I swapped over to a Walbro 15 psi pump (recommended for tbi) for noise reasons (this Walbro is silent) and it doesn't run out of steam, even at highway speeds.

Another reason I switched pumps is 'cuz I was having some issues on steep hills with gas leaking out of the tbi and flooding it out. My thinking was that the 70 psi was too much for the internal pressure regulator to handle and it was finding it's way out. I also put in a new pressure regulator rubber thingy and tightened all the screws. I haven't had a chance to see if this fixes it yet.

First of it's channelocks, not vicegrips,....get it strait if your gonna give me s***!!

I was running something around 11-13 PSI, then I went to a fuel pump that is around 20 PSI. No problems since.

 

[FJ60Cam]

Damn! No idea why I wrote that?? My sincerest apologies to you, o great opener of the bottles. I will sacrifice a few beers tonight in your honor to make amends to the superior bolt-rounding and bottle opening device.

 

[jrob]

Damn! No idea why I wrote that?? My sincerest apologies to you, o great opener of the bottles. I will sacrifice a few beers tonight in your honor to make amends to the superior bolt-rounding and bottle opening device.

Lol...

 

[77TLCFJ40]

Anyone have a 4spd transfer case nose cone? It's the one that's ribbed for her pl.... Uh for strength.
Thanks!

 

[Bodean]

I'll check but don't think I do. I might have just the case. Can Georg not find one?

 

[77TLCFJ40]

I'll check but don't think I do. I might have just the case. Can Georg not find one?

He just does not have one right now. Pardon has a few but I wanted to check locally first.
Thanks!

 

[ntsaint]

Ok, I'm about to expose my ignorance.

What would cause the fuel pump not to pump? The dizzy not firing? Is that what turns the shaft and works the pump? I'm getting no gas past the fuel pump.

I just can't believe that a mechanical fuel pump can go out after virtually no use.

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[ntsaint]

Starting to lose my mind on this.

Pulled the fuel pump. Worked it manually with a hose into a gas can. Pumps like a champ.

Put it back on block, does not pump. I felt the lever engage on the shaft when I installed...

What the hell?

Gas is pouring out of the input hose when I connect it...

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[77TLCFJ40]

Sure hope its not the cam lobe!! Very doubtful.
Check on the spacer issue.

 

[ntsaint]

Sure hope its not the cam lobe!! Very doubtful.
Check on the spacer issue.

It's a two location-in/out pump, not supposed to need the spacer right? Worked fine without it for months.

Ugh.

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[SHUSH]

I fought this fight. I'm guessing spacer issue.

Fuel Pump Operation
The camshaft has an eccentric that is designed to operate the pump's lever arm. The arm's fulcrum point is very close to the part that actuates the diaphragm, so very little movement of the arm at the camshaft results in significant movement of the diaphragm. Each 360-degree rotation of the camshaft results in one complete cycle of the diaphragm itself.

As the diaphragm is pushed up, gasoline above it is pressurized and moved out of the pump and into the fuel line to the carburetor. The pressure of the fuel is typically designed to be 2-6 psi, depending upon the manufacturer. As the lever arm allows the diaphragm to return to its rest position, one-way valves in the pump body prevent the return of fuel from the carburetor and open a path for fuel to be drawn from the gas tank. The vacuum created by the diaphragm's movement draws fuel into the chamber, helped by the siphon already present in the fuel system.


located at How A Fuel Pump Works. http://www.secondchancegarage.com/public/535.cfm


Post 141 ish......https://forum.ih8mud.com/ms-cottonland-cruisers/417624-jsosh26-76landcruiser-shush-8.html. We discussed all this on my truck. End state was it just needs a gasket no spacer. It's paper thin not the thickness of a newspaper.....my pump arm wasn't touching the eccentric on the cam shaft.

 

[ntsaint]

Thx Shush. I've done some looking and it appears I have the wrong pump. The flange on the one I have is very thin, and it appears that the correct oem pump has a much thicker flange, which would allow more arm action.

I still for the life of me can't figure out why it ever worked at all...???

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[SHUSH]

Pics...does it look like this at all?

 

[ntsaint]

Pics...

Awesome man. I have the exact same pump as you did. Arm is not engaging.

Thanks a ton. Ordering the oem from Jacque on Monday.

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[SHUSH]

Cool. The old one in pic was on my block but the po had used an electric pump. I didn't like the electric pump under my crotch so I went back stock. Good luck!

 

[euclid]

Props Shush. Way to pay it forward.

 

[wngrog]

Props Shush. Way to pay it forward.

I know that was hard.

Good job.

 

[SHUSH]

Hilarious. It's Easter so Greg isn't flaming me.

 

[southff4]

I need a intervention....

And a place to live....
















78 with completely rebuilt 60 axels ARB x 2, long-fields,FF rear with poly pro, shackle reversal. Rear stretched powder coated frame new Mojava springs. Set up for v8 all work done by Dave at 4 plus in globe AZ. Complete body with soft top a ton of new parts.

Missing: seats, fuel tank, motor,trans,transfer case.