~Cadillac Deville Concours 59,000 A DISASTER??~

[submariner409]

CC.....good on ya'. If you remember, did the new FPR have a groove for the second O-ring ? There should be 2 rings: 1 small one in the groove in the brass tip, and a larger one in the groove around the plastic body. The larger ring is a safety seal, sort a backup of the small one, to prevent gas from leaking onto the engine if the small ring fails (the fuel pressures run around 45 psi.

Hate to ask you to do the job over, but you might have to, salvaging the larger ring from your old unit. Gently roll it off using a wood toothpick or bobby pin to lift part of it out of the groove. When you put it all together use a smear of engine oil or household oil on both rings: things will slip together much easier.

Do it cold.......and if you're pretty sure there isn't a second groove in the new unit, don't sweat it.

[Ranger]

Maybe the O ring was left inside the fuel rail cup (for lack of a better word)?

The reason you had fuel squirting out after depressurizing it is because you turned the key on afterwards. That energizes the fuel pump and repressurizes the system.

[Cadillac_Cutie]

Well the old FPR had a rounded O ring and another ring but it was flatter and wider than the old ring...and alittle smaller in size. The new one came with the larger skinny O Ring but not the flat one...and the flat one wouldnt fit on the new one....Hmm should I take it off in the morning and check it out again? Will it be ok with just the one? The new part looked a bit different than the old....maybe it doesnt need 2 rings? The flat one wouldnt fit on the new part. Wonder what I should do. Let me know and I can take it off in the morning and recheck but I couldnt get it to fit today.

No pressure at all in the morning after sitting all night right? The DE-PRESSURIZING was the MESSY PART haha

[fubar569]

i've found my car acts much like a self-absorbed female some days...completely fussy, refusing to start, running like crap...etc........then i take it out on the highway and through the twisties and show it who's boss...then she loves me again...15-19mpg city and upto a new personal best of 33mpg highway...

speaking of the FPR...i need to check the one AJ had me install...been having a stupid hard time starting mine lately after sitting for awhile and having the same symptoms as cutie did...

doesnt help i'm also running slightly higher fuel pressure on a stock tune with stock injectors either...as soon as the master gets his 96-99 stuff perfected im sure we can work on this part too...

[submariner409]

CC......Before you rip into the FPR again, take a pic of the old unit and post it. (You might also be able to see a pic of the new (upgraded ?) replacement in www.rockauto.com.)

CC, Call off the dogs!! I just looked at your FPR in RockAuto and it looks a bit different from the post-2000 units. You're good to go as-is. If it ain't broke, don't fix it !!!!!!! Jim

[ejguillot]

Good to see you're doing so well with your own repairs!

Remember the easy way to depressurize: Pull the fuel pump fuse or relay and start the engine. When the engine quits there will be very little pressure left in the fuel system.

[submariner409]

CC........Take a look at RockAuto and see if your replacement unit looks like the two examples for your car....when I click on the pics I swear there are two O-rings.

hate to keep you jumping around, but as you know, pressurized gasoline is something to keep under control.......sorry for the bum post at 10:10 in #35.

[Cadillac_Cutie]

Ok so now Im worried. The little tiny rubble ring on the end was NOT on my new part. Only the larger O ring. Can I go back to the part store and tell them or what? Will they make me take the part off and swap for a whole new one? On the old part when I pulled the screen looking piece out I think maybe there was a tiny little rubber ring down inside the opening that I didnt get out. So if thats the case its down inside there but not sure if its on the little center thing or not or just pressed down in there against it??

Tell me what I need to do. The little tiny rubber piece is the one missing from my NEW part and thats the NEW one I have. The OLD part had a flat round rubber ring and a regular O ring but no little rubber piece. The flat ring wouldnt fit on the new part.

[Cadillac_Cutie]

Ok check the pic above. See the flatter ring? Thats and the other large O ring was on the OLD PART. The NEW part came with only the large O ring not the flat one and wouldnt even allow the flat one to fit on it. The SMALL O ring was not on either. It MAY been down inside where I took the FPR out of....I believe I did see a little black ring. Maybe I should take it all off tomorrow and fish out the little ring and install on the tip like it should go....OR would putting the FPR down inside there not slide it on the tip anyway??

[submariner409]

CC....It appears, from your description, that the smaller O-ring remained in the FPR "socket" and the new unit slipped into place. That is entirely possible, given the shape of the FPR "snout". If the car runs satisfactorily with no fuel leaks, you're OK.

Put it this way: "You lucked out". Don't obsess...check the area a couple of times over the next week or so, and if all is dry and the car continues to run correctly, you're fine. (You can leave the beauty cover off until you're satisfied with your work. Good job.)

[Cadillac_Cutie]

~I drove it immediatly after replacing the part from KY to Indiana about an hour away and back with no problems. No starting problems anymore either so I know it fixed my original problem. What sucks is they replaced the fuel relay and charged me like $160.00 and it didnt even need it. They were GUESSING at what was wrong and I repeatly told them to check the FPR and they said "I DOUBT THATS IT". Im going to drive down to the shop tomorrow to let them know it WAS it and that me...a girl...natural BLONDE at that fixed it myself haha!~

~So I can leave the cover off this week without causing any problems until Im sure I have no leaks? Its not much work to take it off and on just a pain really considering if I need to check it often this week for leaks....to keep removing and replacing. So if the small O ring isnt seated in the right place I will have leaks from the nipple again or around the entire FPR? Just want to be sure of what Im looking for. Also if it does leak or become faulty while Im driving can this cause a fire hazard? Want to make sure what Im dealing with. I about had a heart attack when I had the gasoline shower after forgetting to re-depressurize it when I removed it lolol...if you can even imagine. Hot Motor+unexperienced female+gas shower= 1 paranoid CHICK! ~

[fubar569]

now wait till you start modding it...the addiction is very real and hard to shake!

[Tommy Deville]

Glad you got her runing to ur liking cutie.

[submariner409]

Leave the cover off for a week: won't hurt a thing. Take a look once in a while. It would not leak from the vacuum nipple but around the side, where the big hairpin retainer clip goes around it. If you've driven the car a couple of hundred miles and all's well, you're good to go. Don't sweat it.

Do you have a stethoscope ??? If so, for your own entertainment, with the engine running at idle listen to the top of the valve/cam covers to get an idea of what the valvetrain sounds like. Sort of a busy clicking. Listen just next to the oil fill cap: timing/cam chain whirr. Listen to the top of a fuel injector at the metal fuel rail. Each tick is when the injector atomizes gas into the intake air stroke. (Keep hair and other stuff out of rotating machinery.........)

[Ranger]

Sub, the one thing that concerns me is if the O ring was left down in the "well", for lack of a better word, maybe the FPR valve is not seating correctly. That said, I suppose if that where the case, fuel pressure would be low as fuel would be bleeding off into the tank return line and cause drivability problems. Agree?