Fuel Rail Leakage

I was warming up my 91 XJ, 266k, 4.0L, Manual I came back out to go to work and there was a puddle of gas on the ground. I opened the hood and this is what I saw.

http://i248.photobucket.com/albums/gg198/dodo4bird/IMG_1807.jpg

http://i248.photobucket.com/albums/gg198/dodo4bird/IMG_1806.jpg

There was significant leakage coming from the connection. The part I circled in red is where the leak is, I dorve to work and it slowed down but my car was over reving/ stalling.I do not know what would be leaking, can someone help?

http://i248.photobucket.com/albums/gg198/dodo4bird/IMG_1807-1.jpg

This one should have the red circle.

I believe that is the pressure regulator for the fuel rail (I usually work on RENIX.) If so, there is a seal there - probably an O-ring - and it should be replaced with alacrity! Bear in mind that the exhaust manifold is under there, so it's only a matter of time before you have raw fuel hitting those very hot pipes and lighting up...

Replacing it should be about a ten-minute job. If you want to be thorough, get a fuel rail O-ring kit while you're there and do the whole thing - takes about an hour (soak the o-rings in clean gasoline for about ten minutes or so before you install them - it makes them more pliable and encourages sealing.)

Again, replace that seal ASAFP! Engine bay fires suck, I've had to put out a few for other people...

DUDE! that's leaking on your exahust! No way should you have driven it! Head to the casino, you're lucky ay hell today!

you are one LUCKY SOB!!! GET IT FIXXED NOW!!!!!

Before one of us has to pull you from the burning wreckage....

I called Napa to see what thay have, they do not know about a pressure regulator o-ring. Would the fuel injector o-ring kit work? They come in packs of 3.

Part #
FPG
ES70599

I honestly can't tell you, and I honestly don't think you have time to dork around. Got a dealer handy? Paying a few bucks for an O-ring is still miles cheaper than a total loss...

Fuel leaks should be handled immediately, if not sooner. I always keep an o-ring set on hand for just such emergencies...

Does anyone know the part # for the O-Ring needed to fix a leaking fuel pressure regulator? or what would work?

dodo4bird said:

Does anyone know the part # for the O-Ring needed to fix a leaking fuel pressure regulator? or what would work?

Click to expand...

Call the dealer, and don't dork around with the thing. I don't have dimensions for the O-ring (does anyone? Nominal diameter and "wire" size?) but don't get replacements at the hardware store anyhow, as they're not fuel-rated. Gasoline will dissolve most common elastomers, and you'll be back where you are now in fairly short order.

Fuel-rated O-rings need to be Viton or Nitrile (I belive Buna-N is also an option, and a bit more common,) but if you don't know for sure, don't bother. Go somewhere else and get a fuel-rated O-ring.

That's why I keep mentioning the dealership - you're more likely to get the part that's dead-on balls to what you need, and fuel seals shouldn't be messed about with. Especially on "side-draft" engines, where the fuel rail and/or lines are above the exhaust manifold.

In my experience the fuel injector oring kit came with one for the regulator as well but that was for a renix, just as the stealership how many o rings come in a pack

Called the dealership, Well it looks like I am out a car for a couple days. Ship the part to a dealership then ship it to me. Thanks for the help everyone. Part was $12.99

There are 2 orings in there. Different sizes too.

what do you mean there is nothing wrong with driving a car with a gas leak