Fuel System Problem

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Cantinero

Cantinero

Yo soy un pirata!
Joined
Jul 15, 2005
Threads
55
Messages
712
Location
A Third World Cantina
Website
www.piratasoffroad.com
Hey amigos,

Long time no talk too. That pesky work thing has killed me the last few months. I was hoping to get to the meet last night for the first time in months, but my ol' rig tain't running right now.

Anyways, I was wondering if anyone might be able to give me some advice with a fuel problem I'm having? My 88 fj62 sputtered out and died on me a few nights ago after trying to start it. It ran for a second after I started it and then slowly died. I changed my fuel filter that I had been meaning to get to for awhile thinking that that might have been the problem. It wasn't!:mad: My first clue that it might be something else was that there also was no pressure in the line when I removed the filter.

So the problem is the fuel rail is not being pressurized with fuel. I know this because there is no fuel coming to the inlet side of the fuel filter. I have checked the pump by bridging the +B and FP terminals on the test connector on the firewall and I can hear the pump kick on and run, but no fuel reaches the filter. I left the connection for the fuel line a little loose to see if gas would drip from the inlet side of the fuel filter. I know that's not the safest way to check it, but it was effective none-the-less.:flipoff2:

Is there something else that I can check short of dropping the tank to physically inspect the screen and pump? Can a fuel pump still be faulty if you hear it kick on and run?

My wagon had no hint of problems, before this happened.

Suggestions anyone?

:beer: Cantinero
 
Put gas in it!:flipoff2:

Pumps can die and the motor run, it's rare. The intake line may have come off the pump? The 62 doesn't have a access hatch for the fuel pump?
 
Sounds to me like the diafram in the fuel pump may be shot or a short somewhere in the main relay, but I'm only guessing, all of my fuel injection knowledge comes from honda's, so if your landcruiser was a honda those are the two things i would check...
 
Howdy! Since nobody else asked, are you sure there is gas in the tank? I just went thru 2 "in tank" fuel pumps on my son's Camero, and we had nearly the same symptoms. I would bet it is the pump. My son bought a real cheap unit the first time, and it just plain melted down in less than a year. He spent twice the $$ on the second one, which looked just like the first one??, but it has lasted much longer. Anyone want to buy a 91 Camero?? John
 
Yes, it has gas.

Just filled it up that day as a matter of fact. So this should be a fun task dropping the tank.

I missed the fuel pump access panel by two years I believe. I think they started those in 1990.:mad:
 
Howdy! Sorry, but I just had to ask. Anyway, the Camero has a jumper wire in the engine bay so you can hot wire the pump. The first time we did the replacement, the old pump would move just a little fuel, so we hooked up the battery charger and ran the pump forever to drain the tank. We found that the intank filter had gotten sucked up into the pump orfice. It might have bee OK if we just replaced the filter, but we did the pump also. About 9 months later, that pump completely died, and we had to drop the full tank that time. For some wierd reason, all of the rubber parts had literally melted and the goo had plugged up inside the pump. We never put anything into the tank that should have done that. We put in an American made high $$ unit that time. It is still working fine. You could try blowing some air back to the pump from the filter and see if that clears it up. John
 
inkpot said:
Howdy! Sorry, but I just had to ask. Anyway, the Camero has a jumper wire in the engine bay so you can hot wire the pump. The first time we did the replacement, the old pump would move just a little fuel, so we hooked up the battery charger and ran the pump forever to drain the tank. We found that the intank filter had gotten sucked up into the pump orfice. It might have bee OK if we just replaced the filter, but we did the pump also. About 9 months later, that pump completely died, and we had to drop the full tank that time. For some wierd reason, all of the rubber parts had literally melted and the goo had plugged up inside the pump. We never put anything into the tank that should have done that. We put in an American made high $$ unit that time. It is still working fine. You could try blowing some air back to the pump from the filter and see if that clears it up. John
Click to expand...

No need to be sorry amigo. I have gotten that question three times already from close friends.:rolleyes:

The only thing I did that day different was that I put Shell gas in it instead of my normal 76 stop.

I had thought about trying to blow compressed air back through it to see if that would clear it, but I thought I might damage the diaphragm on the pump or something else. On top of that, if it did clear the line or the obstruction it would still be in the tank and I could look forward to it happening again.

Is there anything else in the rail, between the filter and the pump, that might have gone "south" and caused the restriction of fuel being delivered?

I would think that there would be some sort of check valve to keep the line pressurized between start ups and shut downs. Would this be correct in thought? If so, is it before the filter or after it?

I'd really hate to pull the fuel tank and drop the $350 for an OEM pump to have it not be that.

Any suggestions?? Anyone??
 
Cantinero said:
I missed the fuel pump access panel by two years I believe. I think they started those in 1990.:mad:
Click to expand...


naaaw all three of my piggies had them:flipoff2:

im really not familiar with FI on these rigs, but if there is no gas at the end of the line before the engine, seems its either the line or in the tank/pump. there will be a pressure regulator on the upstream side somewhere, usually on the rail itself, could that be the problem?
 
RHINO said:
naaaw all three of my piggies had them:flipoff2:

im really not familiar with FI on these rigs, but if there is no gas at the end of the line before the engine, seems its either the line or in the tank/pump. there will be a pressure regulator on the upstream side somewhere, usually on the rail itself, could that be the problem?
Click to expand...

Really, they all had them?!

According to my Haynes, I missed it by two years on the 62.

Where were they located in your three pigs? Is it under the rear seat?

As for the regulator, I don't know. That's kinda what I was wondering if it was between the pump and the filter and if this was the problem.

Thanks for your input RHINO, and I still have your bottles I need to get back to you. I gotta say I had a couple of your homebrews later on and they were el magnifico amigo!:beer:
 
Well I finally had a chance to check that out RHINO and I do have an access panel, but it is for the sending unit only.

I got all excited when I saw it.... then it was :crybaby:.

So I guess I pull the tank.
 
Cantinero said:
Well I finally had a chance to check that out RHINO and I do have an access panel, but it is for the sending unit only.

I got all excited when I saw it.... then it was :crybaby:.

So I guess I pull the tank.
Click to expand...
Howdy! All of the in-tank units I have seen have the sending unit and the pump all together, The pump is surprisingly small. Pull it first to find out. John
 
I just did a long post but it would let post:confused: Anyway I have had this problem with my 89 and had to replace the pump. I have a 89 FSM and know how to jump the pump plus where the relay is for the fuel pump. It's a little different in that it has to see air flow before it will let the pump start. I would be willing to help you troble shoot it.

PS don't feel bad the FJ55s only had the sending unit access panel too. The 2F had a mechanical pump bolted to the side of the engine. I'm not sure if the newer ones have a access panel for the pump or not. I'll have to check the FSM for my UZJ100 to find out. I was really disapointed too when I found the access panel was for the sending unit only.


John
 
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