I just got back my set of clean injectors from Cruzin Performance https://www.fiero.nl/forum/Forum2/HTML/083828.html and I was thinking I'd save on downtime by installing them back in the old fuel rail I've had but should I clean it out somehow? It hasn't been used in well over ten years. Could I have issues if I use it? Maybe I should just wait and install them in my existing fuel rail since it's been used daily? Any thoughts appreciated!

quote Originally posted by Gokart: I just got back my set of clean injectors from Cruzin Performance https://www.fiero.nl/forum/Forum2/HTML/083828.html and I was thinking I'd save on downtime by installing them back in the old fuel rail I've had but should I clean it out somehow? It hasn't been used in well over ten years. Could I have issues if I use it? Maybe I should just wait and install them in my existing fuel rail since it's been used daily? Any thoughts appreciated!

On my 3.4 rebuild I used an old fuel rail.
Since it had been on the shelf for who knows how long I did clean it.
First I flushed it out with hot soapy water, rinsed with hot clear water, and blew it out with an air gun.
Then I ran some lacquer thinner through it to dissolve any remaining "gunk" and blew it out with air again.
Noted some light dirt, but nothing horrible in it.

I do suggest disassembling the fuel inlet / outlet block and replacing the gaskets and o-rings. Those are probably pretty "ripe" by now.

I don't think you can hurt the fuel rail by flushing it unless you use some pretty strong stuff. It's an aluminum extrusion, (looks to be 6061 T6)

I also disassembled the FPR before flushing and cleaning it. Not sure how lacquer thinner would have affected the diaphragm in it.
While the FPR was apart I also cleaned off the pressure relief disc in it and the port. That's a polished surface, so I used Q-Tips and very gently cleaned it with lacquer thinner.

[This message has been edited by randye (edited 07-01-2007).]

quote Originally posted by randye: On my 3.4 rebuild I used an old fuel rail. Since it had been on the shelf for who knows how long I did clean it. First I flushed in out with hot soapy water, rinsed with hot clear water, and blew it out with an air gun. Then I ran some lacquer thinner through it to dissolve any remaining "gunk" and blew it out with air again. Noted some light dirt, but nothing horrible in it. I do suggest disassembling the fuel inlet / outlet block and replacing the gaskets and o-rings. Those are probably pretty "ripe" by now. I don't think you can hurt the fuel rail by flushing it unless you use some pretty strong stuff. It's an aluminum extrusion, (looks to be 6061 T6)

Thanks for the advice. By the gaskets and o-rings do you mean on the injectors themselves? Because they were all replaced by Cruzin Performance.
Marc

quote Originally posted by Gokart: Thanks for the advice. By the gaskets and o-rings do you mean on the injectors themselves? Because they were all replaced by Cruzin Performance. Marc

There's a metal and rubber gasket under the schrader valve *and* a metal and rubber gasket under the inlet / outlet block itself.
There are also very small o-rings on the fuel tube ends that you should replace.

(I wasn't refering to the o-rings on the injectors themselves)

quote Originally posted by randye: There's a metal and rubber gasket under the schrader valve *and* a metal and rubber gasket under the inlet / outlet block itself. There are also very small o-rings on the fuel tube ends that you should replace. (I wasn't refering to the o-rings on the injectors themselves)

Thanks for clarifying that! Are they available through The Fiero Store?

quote Originally posted by Gokart: Thanks for clarifying that! Are they available through The Fiero Store?

I just received 2 sets of the tiny rubber o-rings, (#1 and #2), for the fuel lines from Fiero Store.
Don't think they have the gaskets for the schrader valve or the fuel block, but I'd have to look.
This shows the gaskets I'm talking about:


The Fiero parts manual doesn't show a separate part number for the schrader valve gasket or the fuel inlet / outlet block gasket.
They may very well be part of the entire fuel rail assembly P/N
I got new ones separately from the dealer. I just took the old parts in and the counter guy ordered me new ones. Approx. $10 if I recall.

[This message has been edited by randye (edited 07-01-2007).]

You're a huge help! Thank-you. Gave you a positive rating
Marc

Replacing the 20+ yr old fuel block gasket and all the O rings is particularly important. I've taken apart a few to find that this gasket has just about eroded to nothing. You know that it's not long before failure a leak and a fire results. I have the P/N for the fuel block gasket set around here and can post if you need it. If I recall these gaskets are not cheap but the investment is far better than risking a fuel leak and a fire. GM may still have these in the pipeline as other makes of vehicles used the part.

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87GT 3.4 Turbo- 0-60 5.2 seconds
2006 3800SC Series III swap in progress
Engine Controls, PCM goodies,
re-programming & odd electronics stuff
" I'M ON THE LOOSE WITHOUT THE JUICE "

[This message has been edited by Dennis LaGrua (edited 07-01-2007).]

quote Originally posted by Dennis LaGrua: Replacing the 20+ yr old fuel block gasket and all the O rings is particularly important. I've taken apeart a few to find that this gasket has just about eroded to nothing. You know that it's not long before failure a leak and a fire results. I have the P/N for the fuel block gasket set around here and can post if you need it. If I recall these gaskets are not cheap but the investment is far better than risking a fuel leak and a fire. GM may still have these in the pipeline as other makes of vehicles used the part.

I'm thinking now I just settle for an extra day of downtime and use my existing rail. Please post the P/N if you find it though in case I change my mind or for someone else that may search and find this thread. Thanks Dennis.

quote Originally posted by Gokart: You're a huge help! Thank-you. Gave you a positive rating Marc

THANKS!

Happy to be of some service, as many others have helped me here.

As for the fuel block gasket replacement part- we pulled one off the shelf and it is AC-Delco P/N 17110853. Howvever , (now I recall) the fuel block gasket was never sold by GM separately. The kit conists of a new fuel block the fasteners and a new gasket for a price of about $50.00 (if I am not mistaken). Go to GMmonsterparts and see if it is available. It was used on other vehicles so it should be. High price for a small part but cheap insurance against fuel leaks andpotential loss of your Fiero by fire!.

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87GT 3.4 Turbo- 0-60 5.2 seconds
2006 3800SC Series III swap in progress
Engine Controls, PCM goodies,
re-programming & odd electronics stuff
" I'M ON THE LOOSE WITHOUT THE JUICE "