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Discussion Starter #1
I am experiencing a fuel leak at the top of the sending unit under the access panel under the rear seat. I removed the sending unit and inspected the entire thing. Specifically looked for cracks in the plastic top. Looked fine to me nothing out of the ordinary at all. While I had it out I replaced the fuel pump since they are so cheap. Cleaned everything up and put it back in. Still leaking. I am suspecting that the fuel line connection to the sending unit where it locks into place may be the problem. If so what is the easiest fix? I've searched youtube for answers, but nothing tackling this problem only videos on replacing/testing the fuel pump and sending unit. Any thoughts or advice from people who may have had this issue would be greatly appreciated as my daily driver is out of commission.

Thanks in advance!
Paul
 

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Does it leak only when tank is full?

If so, it's probably from a damaged rubber gasket..
 

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Discussion Starter #3
Does it leak only when tank is full?

If so, it's probably from a damaged rubber gasket..
All the time
 

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Just to be clear... It's leaking thru the gray plastic connector on this access hatch? I'm not sure if that's a replaceable part, but it might be... see second pic below. It sorta looks like there are a couple screws holding it in from the bottom. But that could be just another connector for the sending unit, mating up with a bonded-in header in the metal plate?

You might need to replace that whole metal hatch part, if that header is not replaceable.




 

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As in all the time ONLY when tank is full, or even when tank is almost empty? Usually the the rubber seal goes bad and/or rust under the seal causes leak.
To be honest, I'm not sure. All I know is that it usually takes me 10 minutes and multiple tries to get the car started when it's been sitting for a while and most of the time I just give up. It's losing fuel pressure after it sits for a while. I racked my brain trying to figure it out and finally decided to look at it when it was running and noticed a small trickle of gas from somewhere at the top of the sending unit. I could not pinpoint where it was coming from.

Paul
 

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1993 Camry SE,V6-5MT
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from your description, then, it sounds like the pipe from the fuel pump to the engine has a leak

while the engine is trying to start, the leak is reducing fuel pressure, and while the engine is off, the leak would allow fuel to drain back an cause difficulty starting

first thing to check, then, would be the threaded joint visible in the first photo above

or the pipe, to see if it is badly corroded

also, the flex return hose to see if it has dried out, cracked and causing a leak
 

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Discussion Starter #8
from your description, then, it sounds like the pipe from the fuel pump to the engine has a leak

while the engine is trying to start, the leak is reducing fuel pressure, and while the engine is off, the leak would allow fuel to drain back an cause difficulty starting

first thing to check, then, would be the threaded joint visible in the first photo above

or the pipe, to see if it is badly corroded

also, the flex return hose to see if it has dried out, cracked and causing a leak
Hey Norm, so what I have figured out is that it's leaking really bad at the connection to the sending unit. I can see it pouring out. It is not locking into place. It's the type of connector that has the two tabs on the side. The videos I've seen do not show using any special tools. It's just supposed to push on. With the car running I pushed on it and moved in and out about a 1/4 of an inch. That connector looks as if it can be replaced. Like it pushes into the fuel line and can be removed.
292307
IMG-4056.jpg
 

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1997 Camry LE 5S-FE Automatic Kentucky built
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I'm no expert but that looks like a generic push on fuel line connector. You should be able to replace that line as a whole. Getting to that line and being able to replace it is another story.
 

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WOW!... That fuel pump bulkhead design is WAAAAAAYYY different than the Gen3/Gen3.5 design. Must be a change when they went to the Gen4? Can't say I like that clip-on fuel line connector. Not nearly as secure as a metal flarenut on a steel pipe. And that plastic spigot seems like it'd be prone to busting off in a (admittedly) severe wreck.
 

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OK. I just went through this. That looks just like my 98 Camry. I had been smelling gas inside the car. Didn't see anything outside by the passenger door, but smelled fuel there. I took the rear seat off and the cover off the fuel pump. Saw picture above. Turns out I had a thin leak coming out of the nylon tube connector to the fuel pump assembly. I thought it was the nylon tube...NOT. I replaced and still had the leak. Turns out it was the fuel pump assembly. The plastic tube thing that the nylon hose connects to must have a crack. Could not see it. I replaced the entire fuel pump assembly, because I have two 98 Camry's and my other one did not have a fuel smell issue. And no more leak. BTW replacing the nylon hose is super easy. You unscrew it from under neath the car, outside, the rear seat behind driver side. 14mm and 17 mm wrench needed. Unclip from top. Pull hose towards front of car and rotate so L shape connector faces up and then pull down. To install just reverse steps. Hard part is getting that union off. You may want to spray it with penetrating oil ahead of time. Another thing. remove the bolts holding the assembly and lift the fuel assembly to break the seal. Do this before removing the nylon hose. Less gas will spill. Breaking the seal releves the pressure and gas doesn't spill out.
 
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