Fuel Rail Leak

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Oct 8, 2008 | 11:52 PM

Corvette Chris

Thread Starter

Le Mans Master

Joined: Mar 2006

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From: E. Amherst NY

Fuel Rail Leak

Pulled the car into the garage yesterday and smelled gas. Not good.

Pulled apart the intake, and my leak. I believe its the fuel rail return line, on the back side of the fuel rail (left rail). Is there supposed to be an o-ring or something there? I've had this thing apart so many times, I should know by now.

On a semi-related note, I'm having problems with my fuel gauge sender too. Is this just a bad string of luck, or is this ethanol related?

Oct 9, 2008 | 12:45 AM

mash557

Burning Brakes

Joined: Feb 2000

Posts: 927

Likes: 0

From: Saginaw TX

Quote:

Originally Posted by Corvette Chris

The back side of left fuel rail on 86 should go to cold start injector. I would think there would be oring as they are everywhere else. Ethanol is causing a lot of problems with small motors and wouldn't be surprised if that wasn't part of your fuel level problem. Sorry but no idea how to fix that one.

Oct 9, 2008 | 09:53 AM

Midnight 85

Le Mans Master

Joined: May 2004

Posts: 5,866

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From: Hellinois

Finalist 2020 C4 of the Year - Modified

There is definitely a small o-ring on the fitting at the back of the fuel rail.

Oct 9, 2008 | 01:45 PM

Corvette Chris

Thread Starter

Le Mans Master

Joined: Mar 2006

Posts: 5,262

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From: E. Amherst NY

Thanks guys. I've gotta believe the ethanol has something to do with it.

Just got home from work. Headed out to the garage now.

Oct 22, 2012 | 08:02 PM

Mike Wellman

2nd Gear

Joined: Oct 2012

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I have a 1985 c4 .I have a fuel leak right where the fuel line connects on the pasenger side up front. Is there an O-ring at the conection or do I need to replace the unit.

Oct 22, 2012 | 08:03 PM

Team Owner

Joined: Dec 2000

Posts: 21,094

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From: Phila., PA burbs

There's quite a few o-rings around the fuel rails. I'd replace them all while your at it. I did all mine last time I had the fuel rails off.

Oct 22, 2012 | 08:38 PM

vetteoz

Safety Car

Joined: Jan 2004

Posts: 3,556

Likes: 13

Quote:

Originally Posted by TA

There's quite a few o-rings around the fuel rails. I'd replace them all while your at it. I did all mine last time I had the fuel rails off.

http://webpages.charter.net/khasting...uelsystem.html

Oct 23, 2012 | 12:05 AM

leesvet

Safety Car

Joined: Apr 2011

Posts: 3,660

Likes: 22

if one leaks they will ALL leak soon as you reassemble and run.

Get the vitron o-ring kit and be done with it. It takes a fetter ring, barrel type ring in the CS valve. Set o-rings in vasoline, once :set: do not twist,,that tears them.