I've been changing out my injectors for the past 3 months now as some of you may remember. Since I haven't taken the runners off the project is a little more difficult than I had originally anticipated.

The project has come to a complete stand still because it seems that the fuel injector boss for the passenger side injector located closest to the firewall is out of round since it's leaking like a sieve. The new injectors I have are the Accels and now even the old injectors leak in that location. Can a boss just go bad like that? I'm starting to suspect that it may have been leaking from before.

Anyway, I don't have any retaining clips and from what people have said, the clips aren’t even needed. So it's got to be the rail, right?

To test my theory, I've changed out the injectors; swapped old and new injectors; changed the o-rings and nothing seems to work - it just keeps leaking from the sides of that one injector.

Since I'm not willing to take the runners off (cause it's simply WAY TOO HARD with my set up) I'll be disassembling the fuel rail and taking it out in sections. Is that a bad idea?

Also, does anyone know where I can get a direct fit aftermarket TPI fuel rail?

I called House of Camaro but he doesn't have any rails. Any suggestions and/or help is greatly appreciated.

 

I have dealt with them and they are fast with shipping.

Tony

Trans Am Creations

 

I think I figured it out! I took the rail apart and got it out. Then I noticed that the passage behind last injector on the passenger side (closest to the fire wall) is where the fuel enters in from. This is the injector that keeps leaking.

There's an orifice on the inside of that injector's boss where the fuel enters the rail through the pressure regulator. Thus, that injector is right at the foot of the fuel stream. It therefore requires a retaining clip in order to keep it in the right place in order to form a proper seal.

If the injector is too far up into the boss, it's too close to that orifice as well as the inner opening of the fuel rail. Consequently, the fuel pressure pushes past the o-ring. If the injector is too far out of the boss, the fuel will again push past it and leak. So the injector must be precisely in the middle with the o-ring in full contact with the boss' walls. That way the fuel can't escape.

At least this is what I think is the case. Anyone with a better idea, let me know.