: Pretty sure I have a fuel leak somewhere under the hood



weister42
06-09-11, 11:59 PM
Everytime when I do a hard acceleration I get a whiff of the gasoline smell, sometime it happens when I'm on the on/off ramp while going typical speed too. The smell is much more apparent in warm weather and it seems to be tied with my loss of power that I have a post about. I don't smell the gas in winter when it's snowing out.


So I think gas is leaking out somewhere but it is worse now in the warm weather. Got a free fluid leak checkup coupon at a performance shop so I'm gonna take advantage of that. This and I still need to replace my AC programmer so I get ac out of the correct vent, 95 degrees is killing me.



I so want to just say screw it and go buy a 97~99 Concours but I have no money...

89falcon
06-10-11, 02:52 AM
Everytime when I do a hard acceleration I get a whiff of the gasoline smell, sometime it happens when I'm on the on/off ramp while going typical speed too. The smell is much more apparent in warm weather and it seems to be tied with my loss of power that I have a post about. I don't smell the gas in winter when it's snowing out.


So I think gas is leaking out somewhere but it is worse now in the warm weather. Got a free fluid leak checkup coupon at a performance shop so I'm gonna take advantage of that. This and I still need to replace my AC programmer so I get ac out of the correct vent, 95 degrees is killing me.



I so want to just say screw it and go buy a 97~99 Concours but I have no money...

Did you ever get your fuel rail replaced under warranty? not sure it applied to the the 98's, but on my 97, the factory nylon rail has a tendency to spring leaks.....lots of them.......the fix was a solid metal rail...

Ranger
06-10-11, 11:26 PM
What year is this car? Update your profile so we don't have to ask.

weister42
06-10-11, 11:50 PM
What year is this car? Update your profile so we don't have to ask.


I got a 98 Deville sedan, isn't it on the top right hand below my post count? I think it used to be under the username but it changed.



Took couple photos of the fuel rail, what do I have here? (right-click and select view image to zoom in)

http://i82.photobucket.com/albums/j255/weister42/Cars/DSCN0198.jpg

http://i82.photobucket.com/albums/j255/weister42/Cars/DSCN0201.jpg

Ranger
06-11-11, 12:42 AM
Oops, the model profile was moved while I was gone for few days. It used to be under your name.

You have the nylon fuel rail, but the '98 was not included in the recall. It was '95 - '97. Look closely at each connection between injectors for a leak. Also check the FPR.

89falcon
06-11-11, 02:15 AM
Oops, the model profile was moved while I was gone for few days. It used to be under your name.

You have the nylon fuel rail, but the '98 was not included in the recall. It was '95 - '97. Look closely at each connection between injectors for a leak. Also check the FPR.

And also look at the pipe where it goes under the throttle body.....it's hidden pretty well and can leak underneath and go undetected (except the smell.....). Not sure why the recall did not apply to the 98's....the nylon rails are CRAP, and a severe fire hazard IMO. GMPartsdirect.com sales a new METAL rail for about $130.....and it's about an hour worth of work if you are taking your time to replace it.

I'm sure GM would try to tell you that the 98 rails are just fine....if that was the case, then the fix for the bad nylon rail in the 1997 would have been a new nylon rail....not the metal one!

Ranger
06-11-11, 12:21 PM
My understanding is that they changed compounds in the '98 rails, but you bring up a good point.

89falcon
06-11-11, 02:47 PM
My understanding is that they changed compounds in the '98 rails, but you bring up a good point.

My biggest complaint about Cadillac is that I don't think they "step up" enough.....example: my 04 CTS started leaking out the rear diff....I immediately started doing some research, and found that the 05 and 06's had a recall for the same problem....but not the 04s....after even more checking, I found out that my rear diff seal had already been replaced once......in 06 (I bought it in 07).....I'm willing to bet Cadi used one of the "bad" seals that were subject to the recall to "fix" my car.....but since it was more than 12k miles ago, they refuse to fix it.....

There is a GREAT deal of goodwill that is gained when they step up.....and a lot is lost when they don't

weister42
06-11-11, 07:12 PM
So the stainless steel fuel rail from a 97 Deville/Seville shouild fit my car too right? Like these ones?

http://cgi.ebay.com/ebaymotors/NEW-GM-Fuel-Rail-Kit-12583145-Aurora-DeVille-Eldorado-_W0QQcmdZViewItemQQhashZitem4157ee60feQQitemZ28064 8114430QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccesso ries

http://cgi.ebay.com/ebaymotors/1996-CADILLAC-SEVILLE-STS-V8-FUEL-RAIL-_W0QQcmdZViewItemQQfitsZMakeQ3aCadillacQQhashZitem 3cb6cd0cb1QQitemZ260764929201QQptZMotorsQ5fCarQ5fT ruckQ5fPartsQ5fAccessories

http://cgi.ebay.com/ebaymotors/NOS-Genuine-GM-Fuel-Rail-Kit-Aurora-DeVille-Eldorado-_W0QQcmdZViewItemQQhashZitem27b75cc556QQitemZ17058 0034902QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccesso ries



btw my FPR is fine, no leaks. I think the nylon fuel rail looks friggin stupid and the stainless steel one looks like it'll make the fuel flow better.

89falcon
06-11-11, 08:23 PM
So the stainless steel fuel rail from a 97 Deville/Seville shouild fit my car too right? Like these ones?

http://cgi.ebay.com/ebaymotors/NEW-GM-Fuel-Rail-Kit-12583145-Aurora-DeVille-Eldorado-_W0QQcmdZViewItemQQhashZitem4157ee60feQQitemZ28064 8114430QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccesso ries

http://cgi.ebay.com/ebaymotors/1996-CADILLAC-SEVILLE-STS-V8-FUEL-RAIL-_W0QQcmdZViewItemQQfitsZMakeQ3aCadillacQQhashZitem 3cb6cd0cb1QQitemZ260764929201QQptZMotorsQ5fCarQ5fT ruckQ5fPartsQ5fAccessories

http://cgi.ebay.com/ebaymotors/NOS-Genuine-GM-Fuel-Rail-Kit-Aurora-DeVille-Eldorado-_W0QQcmdZViewItemQQhashZitem27b75cc556QQitemZ17058 0034902QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccesso ries



btw my FPR is fine, no leaks. I think the nylon fuel rail looks friggin stupid and the stainless steel one looks like it'll make the fuel flow better.

Thanks for making me feel stupid for paying a lot more!!!!

It doesn't look like any of those 3 are the "right" version. Your fuel lines go straight out at the connection to the fuel lines....ie, they don't take that 90 degree bend. My SS rail had the straight connections, just like yours. But the rest of the rail is right and should work.

Go to gmpartsdirect and get the part number from there....THEN go to ebay.

Ranger
06-12-11, 01:09 AM
Great prices if they are the right ones. I think the dealers charge $250 if I remember correctly.

weister42
06-12-11, 01:13 AM
Okay so I think the part# is 12499784

http://parts.nalleygmc.com/showAssembly.aspx?ukey_assembly=379298


That's for the nylon one though. I do have a spare nylon fuel rail just like mine sitting in the garage with injectors on it so maybe I can study that and figure out how they come off.

89falcon
06-12-11, 01:44 AM
Okay so I think the part# is 12499784

http://parts.nalleygmc.com/showAssembly.aspx?ukey_assembly=379298


That's for the nylon one though. I do have a spare nylon fuel rail just like mine sitting in the garage with injectors on it so maybe I can study that and figure out how they come off.


RAIL KIT,M/PORT F/INJN FUEL(STAINLESS)(REPLACES NYLON)(ACDelco #12499784)

looks like that is the right part number! but it's $102 at gmpartsdirect + about $25 shipping and handling.

weister42
06-14-11, 02:24 AM
So the mechanic told me that a valve at the driver's side(forgot what the valve is called)next to an injector is leaking and I can see it's wet when he showed me, it's the valve that looks like a tire stem and used for testing pressure/bleed out the fuel. He also said my fuel tank filler neck is rusted and it is wet when he touched it. He didn't get to check my injectors because ya know, it is a free checkup.

Submariner409
06-14-11, 11:55 AM
The valve on the fuel rail end is the Schrader valve - test port. The guts screw out just like a tire valve. Junkyard or screw the black cap on tight - you might find a same-sized brass cap at an air conditioning dealer.

Fuel filler neck is made of Unobtainium - talk to Chris up in Rippy Cadillac Parts - ^^^ Vendors.

Robertsong
06-20-11, 05:16 PM
well I have a 94 concours, and I too had a gas leak. They had to replace the gas line from the tank to the engine. Oouch. It was an expensive fix, but the line had a cut in it and it stank to high heaven. It doesn't take much to buy a concours! Unfortunately mine will be for sale shortly. I have the leak problem, thank god not the HG bolt issue! A cheap drip pan, and a watchful eye on the oil level, and I have been driving it this way for about 3 years.. Over 20,000 miles and not another problem. She is a beaut! I will miss driving it. So smooth....