Thread: Update on my fuel rails

Well, Paul from PRJ said the gen 3 rails turned out fantastic and they should arrive by end of next week.
Sooooo I decided to get a head start and pull off my stock rails. Wasnt too bad except the injectors pulling out with the rails. Of course it was the back drivers side which is a PITA to get to LOL.
My question is I thought someone on here said save myself issues and replace O rings? There are O rings top and bottom on the injectors. Should I replace all of them. Also one pulled off and the small retainer that seems to hold the O ring on the bottom portion fell off into the engine bay abyss and I cant find it. Will a place like NAPA have these or do I need to go to a dealer?
Any other tips before I get my rails as far as install I'd appreciate your input.
Thanks In advance

Originally Posted by David99GTP

Well, Paul from PRJ said the gen 3 rails turned out fantastic and they should arrive by end of next week.
Sooooo I decided to get a head start and pull off my stock rails. Wasnt too bad except the injectors pulling out with the rails. Of course it was the back drivers side which is a PITA to get to LOL.
My question is I thought someone on here said save myself issues and replace O rings? There are O rings top and bottom on the injectors. Should I replace all of them. Also one pulled off and the small retainer that seems to hold the O ring on the bottom portion fell off into the engine bay abyss and I cant find it. Will a place like NAPA have these or do I need to go to a dealer?
Any other tips before I get my rails as far as install I'd appreciate your input.
Thanks In advance

PM Farnsworth, he has a complete ring kit, upper, lower for each injector and two per each fuel line. Pretty cheap too. I can't comment about the broken injector with authority so I will leave it to someone more qualified.

I checked onine and saw ZZP and Intense has new injectors. ZZP offers a 10 dollar rebate for each one returned. They have 25lb, 42.5 lb. What is on a stock GTP?
I'll check with Farnsworth on the kits

dont worry about that tab, just make sure the orind is properly seated.

you can also get o-rings form zzp

Originally Posted by scooz14

dont worry about that tab, just make sure the orind is properly seated.

you can also get o-rings form zzp

Yeah I just saw the o-rings on ZZP. I didnt know if that plastic ring /clip was necessary or important. ZZP offers a 10 dollar rebate for returned injectors when you buy them but it states they must have the ring/clip. So I thought maybe its bad if I dont have it on when I reinstall the injectors.

Im not sure about the broken clip. Its used to hole the o-ring, so I would consider it important. Its part of the structure of the fuel injector so I personally would be hesitant to put it back in.

That was my concern, figured its there for a reason and why would ZZP not give a credit on a core return without it if it wasnt important.

They commonly break. You'll probably break more of them as you remove and replace the o-rings.

Originally Posted by DuBob

They commonly break. You'll probably break more of them as you remove and replace the o-rings.

And they will be okay like that?

The injectors are clipped onto the fuel rail, so when you remove the rail, the injectors are made to come with it. Its a nice thing they did by adding the injector clips. Thats normal.

The part you broke off happens with age, and heat being on them all the time. Its normal, but you want to avoid it if you can. Sometimes you cant though.

The part that broke off only holds the o-ring onto the injector when you pull it out of its bore. With it missing, it wont hurt anything with it missing, just when you pull out the injector, the o-ring may stay behind. Not big deal, you can dig it out with a small screw driver.

The part that fell down into the injector hole...if you can, get you a thin piece of metal and add some tape to the end of it, sticky side out, and see if you can retrieve it. If you cant, it wont hurt anything as small as it is. I will adventually work its way down the exhaust pipe and get stuck to the cat and melt away over time.

When I did the o-ring replacement on the GF's car, this happed to me as well, and couldn't get the piece that broke off out of the engine, and haven't had any problems to date. That might make you feel better.

As for the o-rings, its recommended that EVERY TIME you remove the injector, you replace the o-ring. Thats a bit much, but if you have never replaced them, then yes, by all means you should now. They are cheap, and worth the investment to protect your investment as I always say.

You can get the injector o-rings from any auto parts store. I know O'Reillys sells them 2 per box, so you will need 6 box's of them.

I can get them as well, in bulk sometimes cheaper. I provide a full set to do a L67 and the feed and return fuel line quick connects as a complete set for $14.00 shipped to your door. Thats 12 injector o-rings, and 2 feed line quick connect o-rings, and 2 return line quick connect o-rings.

~F~

Oh, for got you say, that when your changing the o-rings out, instead of rolling them off the injector, its better to cut them off. I use a thin pair of cutters I have, but you could carefully use a razor blade as well.

When they get old, they get hard, and if they don't crack or break off when you try to remove them, then they will break off the little plastic lip of the injector you broke off in those pictures. I try to avoid this when I switch them out for people, so thats why I cut them off every time. Its a much better method.

~F~

Wow...I have never broken any yet....sucks.

Originally Posted by GR8racingfool

Oh, for got you say, that when your changing the o-rings out, instead of rolling them off the injector, its better to cut them off. I use a thin pair of cutters I have, but you could carefully use a razor blade as well.

When they get old, they get hard, and if they don't crack or break off when you try to remove them, then they will break off the little plastic lip of the injector you broke off in those pictures. I try to avoid this when I switch them out for people, so thats why I cut them off every time. Its a much better method.

~F~

WOW, Thanks so much. I can sleep now over the lost piece. I have been thinking of a whole new route. What about upgrading to say 42.5lb injectors? ZZP offers a set flowmatched. Is this over kill for my current setup? My PCM was purchased from PFYC and was programmed by digital horsepower. Will I need my PCM programmed /tune again with new injectors?
Maybe I am answering my own questions here LOL, guess with all I am doing maybe a tune would be good anyway. I never did do a case learn. Guess I am on the fence if upgraded injectors are a good idea. I was gonna go with OEM but NAPA was about 114 a piece!! Since mine have 110K wasnt sure my best route here.

Your PCM will defintely need to be reprogrammed for new/different injectors.

Will I gain anything by doing it. Are they just for high horsepower mods? Wasnt sure if it was worth the investment.
I have a local memebr who can program PCMs. As long as the car is driveable until I meet up with him LOL

Originally Posted by David99GTP

Will I gain anything by doing it. Are they just for high horsepower mods? Wasnt sure if it was worth the investment.
I have a local memebr who can program PCMs. As long as the car is driveable until I meet up with him LOL

Unless your injectors are clogged or bad, I doubt new ones will be a big benefit..I'm trying to remember your mod list though.

With as many miles your has perhaps just getting cleaned and flow tested by a reputable place may be a cheaper better alternative.

Check out Deatschwerks they sell and clean injectors.
There is a place called witchhunter that does them as well.

I'll look into cleaned and flow tested. No sense in getting high perf if gains arent noticeable. My Mod list for performance is small, Wizaird CAI, MSD coil packs,
PRJ 10.4mm wires, NGK plugs, PRJ gen 3 fuel rails, Digital Horsepower programmed PCM, & U-Bend delete.

Originally Posted by David99GTP

I'll look into cleaned and flow tested. No sense in getting high perf if gains arent noticeable. My Mod list for performance is small, Wizaird CAI, MSD coil packs,
PRJ 10.4mm wires, NGK plugs, PRJ gen 3 fuel rails, Digital Horsepower programmed PCM, & U-Bend delete.

You definitely don't need aftermarket injectors then. I've recently seen a before and after cleaning video...It has me thinking about pulling mine and sending them in for cleaning and flow testing. I have 7 Ford Lightning injectors so I could use the 6 best.