I built a 82 4x4 with a 92 22RE engine and am trying to use an external electric fuel pump. The first one I bought ran for a while bt seemed to run lean and finally died. I found that specs for the factory in tank pump show 110 to 120 psi and 50 to 60 gph but none of the aftermarket external units seem to have such high psi specs. Since the regulator maintains fuel pressure at 40 to 45 psi is it necessary to have a pump which supplies 110 to 120 psi or will 75 be adequate so long as delivery flow is within specs? Can anyone recommend a specific pump?

 

I would think as long as it flows @ your listed GPH and PSI it would work. I saw a Denso on eBay but I don't know the specs DENSO Premium Parts 951-3002, Electric External Fuel Pump 12v Female Threaded inlet and outlet
Maybe check what pumps are being used in fuel injection conversion kits for vintage vehicles. Holley pumps? Carter? See if any of the diesel pumps are ok with gas, like Raptor pump?? Seems like cheap ones don't have any longevity.

Any way to stick in a Toyota EFI tank and pump?

Good luck. Let us know if you find a good option. Dead end threads suck.

 

Thank you for your response! There seem to be no external pumps I can find which have the strangely high psi (110 to 120) as the factory in tank pump.

 

I am going to try a Walbro 190 LPH pump but have found it needs a 20 amp feed so I will install a new 30 amp relay and wiring to feed this. Wish I could just used an in tank pump but can't find the old stock tank I took off some years ago. Strange since I seldom throw anything away, but maybe I sold it to someone. The little brain cells sure do shrink with age.

 

You didn't mention where you mounted the new pump, it matters.
If you mounted it under the hood your symptoms make perfect sense. electric pumps generally push better than they pull, so you need to mount them close to the tank and as low as possible to get the best pressure and flow from them.
Another thing that could be fouling you up is tank venting, if you are pulling a vacuum in your tank it will starve the pump and the engine.

 

Old pump was mounted just in front of the tank and on the frame rail. The new one I will mount even lower inside the frame rail and as low as possible. I have also found the new pump requires a 20 amp feed so I will be installing a new 30 amp relay and wiring but triggered by the original 15 amp fuse circuit.

 

In preparing to install my new external pump I reviewed the wiring diagram and find there are two relays: The main one and the circuit opening relay. Since my new pump requires a 20 amp feed, I believe I need to take the activation wire from the circuit opening relay and use that to activate my new relay which I will supply with a new 30 amp fuse; 12 gauge wire from the battery+; new 12 gauge wire to the pump and ground wire as well. Comments welcome.

 

Sounds like a plan. Let us know how it works out.

 

I would still recommend a stock fuel pump and tank for a 93 22re with all of the proper hoses/vents etc. But if you do go with the aftermarket in-line pump and it works make sure you draw up a diagram and stick it somewhere for future troubleshooting.
Otherwise we will be answering someone's questions in the future like "the PO butchered the fuel pump wiring and I can't figure it out, please help!"

 

Thanks AKwheeler good advice I'm sure just can't get a used tank anywhere so going ahead (foolishly?) with my plan. Today I made a bracket and mounted the Walbro pump as low as possible on the inside of the frame rail with the bracket having a protective bottom. I'll shoot some pics when I go back under to wire it and plumb the lines. I did notice the 82 tank has ¼ inch outlet which I hope won't be an issue. I will convert to 5/16 hoses and hard lines immediately from the tank an going onto a metal can filter. Based on Bernoulli's principle this should just mean the fuel will move faster through the tank line which I guess could be an issue at low levels of fuel in the tank possibly sucking in air. Problems, problems. Where the heck is that old 92 fuel tank? Photos soon.

 

how d'd that work out for you ?

 

This project finally seems to be working and driving well. At first, the new pump seemed fine but then it had a few times when the truck would be running and die as if running out of fuel. It took a lot of head scratching and reading but I eventually took apart the AFM and cleaned the fuel pump contact points as well as I could using electrical contact cleaner, then resealed the unit. There have been no failures since. One additional problem is the fuel gauge doesn't work. Research makes me think I need to remove the truck bed for access and check for a broken wire at the tank. Again, thanks for all the help given by folks here plus the wiring diagram someone supplied.