Cummins 4bt into my FJ60

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The P7100 doesn't happen to have a fuel cutoff solenoid like the VE pump does it?

I totally forgot about hooking that up on my engine and it wouldn't fire up.

I forgot about the fuel shut also and had one go bad on one of my boats 5.9's, It was sticky and did not open sometimes and was a pain to to diagnose too! You can run power to it and watch how the piston moves or maybe listen to it.



Doug
 
The P7100 doesn't happen to have a fuel cutoff solenoid like the VE pump does it?

I totally forgot about hooking that up on my engine and it wouldn't fire up.

If this was the issue then I don't think it would have fired in the first place. It could have gone bad :hhmm: Another thing to check, for sure.
 
I am sure you are on it. But are you sure you have the lines hooked up correctly. Maybe you grabbed the vent line or return line instead of the feed?

Cli t
 
I would blow some air into your tank through the lines before the filter and listen for bubbling. Is the tank vented well? Filter OK?

I checked all the lines AGAIN today. Pulled the fuel tank AGAIN. The connections are solid.

Unhook the suction line to the p7100 and give it a short, unrestricted supply of clean diesel. The p7100 can draw it's own suction for a while without damage. Use a cheap inline filter. Place the bucket above the pump to aid priming. This will tell you which way to focus your attention. Fuel supply, or p7100 and farther downstream. If it is the supply, disconnect at the tank and repeat. Then narrow it down.


Maybe post up some specifics of the supply, like line size, routing, lift pump brand, model, location, fuel filter brand, type, and location. Might help us armchair quarterbacks a bit.

I got it started twice today. I removed the line that attaches to the lift pump from the tank. I opened the bleeder valve at the fuel filters (Which is after the lift pump) and I put a short piece of hose onto the lift pump sticking straight up and used a squeeze bottle to squirt diesel into the lift pump while I pushed the hand primer on the lift pump. I pumped the the hand primer until I got clean diesel out of the bleeder valve (this was weird because once I got the clean deisel out or the bleeder valve, a few seconds later, before I could get the wrench in to close the valve, it would bubble. So I would repeat the process until there wer no pubbles. But wat was weird was what was pushing th bubbles out if I wasn't pumping the primer?). Now I sucked fuel up the hose from the fuel tank and put my thumb on it trying not to let the fuel suck backward and pull air into the system. Then I tried to get it on the nipple for the lift pump without letting too much air in. I have to say I have my doubts that I got it on without letting air into the system. Then I tried to start it. It ran. I had time to bleed the injectors before it died. And it dies fast. A couple of sputters and done. I repeated the process, only this time as soon as I started it I opened the bleeder valve at the fuel filters. At first nothing was comming out so I pumped the prime button and then bubbles and fuel. I stopped pumping the primer and there seemed to be fuel still coming out of the bleeder valve. This led me to believe that the lift pump was working and pumping fuel. I started to the other side of the rig to bleed the injectors and it sputtered and died. This is when I tore the whole system apart again to see if there was a leak that I missed. Nope!

So, I'm thinking that the little bit of air (or a lot of air) I'm getting in the fuel line is what is killing it and that the lift pump has no way of pulling once it hits air. So, How to get the iar out of the fuel line?

It just occurs to me that I have not tried to open the bleeder valve at the filters and then crank the engine to see if the lift pump will prime and push the air out. I think we did open the bleeder valve and use the hand primerand that yeilded nothing, but I'm not sure.

The line out of the fuel tank is -8AN going to a connector and then it is -10AN to the lift pump which is a piston pump driven by the cam shaft.

One issue to consider is crud! ULSD is a solvent and melts old hard deposits in fuel tanks and lines. Here in SoCal, there were many cases of blocked fuel pu's, lines and filters after the switch to ULSD.



I had to cle4an my filters and lines a few weeks after my swap due to this brown goo that I found in the clear bowl of my primary fuel filter.


All the above tests are good to try and in a good order imo.


Hope it's an easy fix.


Doug


I don't think that should be an issue yet as the filters are brand spanking new, and Everything looked good when I pulled the tank.


The P7100 doesn't happen to have a fuel cutoff solenoid like the VE pump does it?


I totally forgot about hooking that up on my engine and it wouldn't fire up.

I got one and it is hooked up and running fine. I have the pull wire removed from the starter because of all the cranking. I have been activating the pull by crawling under and touching the wire to hot breifly after I turn the hold on. As a matter of fact, I left the hold on last night.


I am sure you are on it. But are you sure you have the lines hooked up correctly. Maybe you grabbed the vent line or return line instead of the feed?


Cli t

Believe me, I wish I had done that! Lol
 
Here's something I hadn't considered: Which is bigger at the fuelpumps, a diesel nozzle or a gas nozzle? Will I be able to pump diesel into my tank with the set-up I have now, or do I need to alter the fuel intake I have now?
 
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Here's something I hadn't considered: Which is bigger at the fuelpumps, a diesel nozzle or a gas nozzle? Will I be able to pump diesel into my tank with the set-up I have now, or do I need to slter the fuel intake I have now?

Diesel nozzle, unless you go up to one of the 'auto diesel' fueling stations.

There is a restrictor plate inside of the filler neck. Remove the fill neck, drill out the spot welds, remove the restrictor, weld holes up.
 
Here is one after removal of the restrictor. Mine has also been moded to fill my second tank from one fill neck.

It's easy to remove restrictor.

Doug
IMG_4112.webp
 
The consensus seems to be that, yes, I should be able to pull fuel from the tank with the lift pump starting with a dry hose. Word is, I will have to use the hand primer with the bleeder valve open and I will have to pump it several hundred times. This is what I will be doing after work tonight.

Should this not work I will seriously be considering an in-line fuel electric fuel pump. Has anyone used one of these with their diesel build? I was looking through the manual and I think I read a fuel pressure of 5-6 pounds. Is that correct?
 
Which lift pump do you have? The old style diaphragm one or the newer piston? I upgraded to the piston, but still have my old diaphragm one. Let me know if you need it.

Also, be careful with adding an electric pump since the lift pumps on these are fairly low pressure. An electric pump with more pressure than the stock lift pump could damage the seals in the IP.
 
Which lift pump do you have? The old style diaphragm one or the newer piston? I upgraded to the piston, but still have my old diaphragm one. Let me know if you need it.

Also, be careful with adding an electric pump since the lift pumps on these are fairly low pressure. An electric pump with more pressure than the stock lift pump could damage the seals in the IP.

I have the piston style lift pump with the hand prime button on it.
 
And the heavens opened and the angels sung! I got my Cummins diesel FJ60 running and on the road tonight! Oh-my-Dog is it loud! And man, do I love it! Think Skid Steer with a turbo-whistle. Lol

Runs great. Drives great. I have some things to button up in the next few days, but otherwise, everything is good.

Everyone, have a beer.
 
And the heavens opened and the angels sung! I got my Cummins diesel FJ60 running and on the road tonight! Oh-my-Dog is it loud! And man, do I love it! Think Skid Steer with a turbo-whistle. Lol

Runs great. Drives great. I have some things to button up in the next few days, but otherwise, everything is good.

Everyone, have a beer.

congrats, now post up the porn pics. I need my fix.
 
Glad to see everything is going great! :clap:You may have just had too much air in the injector lines themselves and it took a while to get them all bled out.

These things make the earth move. Nothing like it. We need some video, with sound! I am still fighting an issue with my transfer case seals so I pulled most of the exhaust system off last night. I couldn't help it, had to drive around for about an hour just to hear the straight pipe and the turbo wine. Sweet, sweet music!
 
good deal....on getting it running. IT makes all the hard times worth it.
 
And the heavens opened and the angels sung! I got my Cummins diesel FJ60 running and on the road tonight! Oh-my-Dog is it loud! And man, do I love it! Think Skid Steer with a turbo-whistle. Lol

Runs great. Drives great. I have some things to button up in the next few days, but otherwise, everything is good.

Everyone, have a beer.

Congrats brother! Now break it down, what did you do to make it work?
 
congrats, now post up the porn pics. I need my fix.

The porn will have to wait, sorry. I didn't get it moving until after dark and I was not in the shop, so not enough light for filming. I will get some soon.

Glad to see everything is going great! :clap:You may have just had too much air in the injector lines themselves and it took a while to get them all bled out.

These things make the earth move. Nothing like it. We need some video, with sound! I am still fighting an issue with my transfer case seals so I pulled most of the exhaust system off last night. I couldn't help it, had to drive around for about an hour just to hear the straight pipe and the turbo wine. Sweet, sweet music!

So you know what I'm talking about! Loud, but strangely soothing.

good deal....on getting it running. IT makes all the hard times worth it.

You can say that again! Thanks for all your input, BTW, El.

Congrats brother! Now break it down, what did you do to make it work?

Mostly, I stopped being stupid. Over at 4btswaps a couple of guys confirmed what I as thinking: Crack the bleeder valve and hand prime the system, but it would take a lot of pumping. They were right and wrong. It only took 26 pumps to prime the system. I was trying to prime the system with the bleeder valve closed before. D'oh! Man, she fired right up last night and never quit again.

I drove to get fuel and then to show it to a couple of buddies.
 
I don't have a cummins but I got an old school diesel. Every single time I have had a problem with it, it was in fuel delivery. And every time I was able to solve the problem by getting fuel into the motor. Sucking air, leaky lines, air in the injectors and all that jazz was always the culprit. It can be a pita to get rid of the air or leaks and get it primed right. However, I personally would rather do this any day then trouble shoot a modern day petrol motor.

if you have any air left in it or a nut on your injectors is leaking you will get injector knock. It will sound like a miss fire and can also make the engine smoke.

Glad you got it going.....

Cheers
 
Great news, Wyoming!

Yeah, they are loud. That's the main reason that my wife hates driving in my truck (and the exhaust smell and black cloud on start up). Sound proofing does help, but you can do that later :)
 
Well done! But without pics...you know what they say - It did not happen!

Doug
 
Boots! I forgot to thank Boots! I couldn't have done it without you Boots. Thanks for the help!
 

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