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DTZ ZR1
08-02-2009, 10:38 AM
I will pulling the injectors out today and replacing them. What is the best method to flush out fuel?

DT
secondchance
08-02-2009, 11:22 AM
I will pulling the injectors out today and replacing them. What is the best method to flush out fuel?

DT

Any reason you want to flush out fuel? Has it been sitting for a long time?
tpepmeie
08-02-2009, 11:41 AM
Word of advice... don't forget to remove gas cap to vent the tank pressure. you will have quite a mess otherwise. ask me how I know :redface:

Todd
A26B
08-02-2009, 11:46 AM
Word of advice... don't forget to remove gas cap to vent the tank pressure. you will have quite a mess otherwise. ask me how I know :redface:

Todd

+1 from me! I made that mistake doing a fuel filter change. Gas really burns underarms:jawdrop:
ZR1Vette
08-02-2009, 12:37 PM
I think it is worth while to clean out the fuel rails...I used a carb cleaner (being fuel system friendly) and then compress air to blow out everything. Place the rails on a slight incline with 'B' at the bottom and start shooting in the clean so it runs out at the last injector site (marked 'B') and also make sure you blow starting with the injector seat (marked 'A') closest to fuel rail cross overs and blow downwards away from the cross overs towards 'B'.

Reason I did clean was because there was a brownish residual from the gasoline (some call it varnish) and once cleaned looked like this>>

http://i17.photobucket.com/albums/b79/MRBLU/ZR1fuelrailandprimaryinjectorsnewco.jpg

Also, be careful not to flex/strain the fuel rail cross overs/seats...they do wiggle easily.

To depressurize the fuel system in addition to what has been noted (open gas cap) also release pressure at the fuel rail shrader valve.
vettn71
08-02-2009, 05:20 PM
I installed new injectors, just to have one misfire due to trash in the rail. It's goos insurance against another pull.

Jim
DTZ ZR1
08-02-2009, 05:31 PM
The guy I bought the car from said it has been sitting for 5 years. He said he bought the car and put it in his barn and that was it. I will flush out the rails, thanks for the info.


DT
:cheers:
Z51JEFF
08-03-2009, 06:43 PM
Why not just go ahead and take the thing completely apart,replace O rings at the reg and lines,get a good look at everything.
ZR1Vette
08-03-2009, 09:28 PM
Well do you do it and at what $$.. yes I agree with the concept of replacing everything but in this case did not thinking it was necessary
A26B
08-03-2009, 11:08 PM
Cost is $8.28 for a set of 9 o-rings to do the rail/regulator fuel lines.

It's kind of a PITA to do, but as old as our cars are getting, these soft goods need to be replaced. I don't see the need every time, but if it hasn't been done yet, then I would say it's time. Fuel leaks are bad news and can be dangerous and expensive.

I've probably given away 100 sets of fuel block o-rings since starting the gasket business....as a way of saying thanks to customers and because it's a safety item.
Demps
08-03-2009, 11:21 PM
Cost is $8.28 for a set of 9 o-rings to do the rail/regulator fuel lines.

It's kind of a PITA to do, but as old as our cars are getting, these soft goods need to be replaced. I don't see the need every time, but if it hasn't been done yet, then I would say it's time. Fuel leaks are bad news and can be dangerous and expensive.

I've probably given away 100 sets of fuel block o-rings since starting the gasket business....as a way of saying thanks to customers and because it's a safety item.

Hey, my 415 and SGC 350 are running great thanks to you! A little insurance goes a long way.

Ted
A26B
08-03-2009, 11:32 PM
Running good enough to meet up in Memphis for a little Beale Street boogie?? Say hello to Caroline:wave:
ZR1Vette
08-04-2009, 06:56 AM
Point taken... anyone know how sensitive the fuel pressure regulator is to 'cleaning' etc? That was my main concern when cleaning the fuel rails.
DTZ ZR1
08-04-2009, 12:54 PM
Did flush the rails out and put the new injectors in with no problem. Actually was easier than I thought it would be. Now after reading some of the post I think I should change all the o rings out before I put the plenum on. Proably would be cheap insurance.
DTZ ZR1
08-08-2009, 11:29 PM
After flushing fuel rails I replace the O rings which I received for Jerry's gaskets. I was easy and I put the rail and injectors in the car. Put the coil packs and wires the I received for Jeff. Waiting for PCV hoses from White Racing to finish the job and hear her come to life again. Thanks for all the help.

DT