Fuel rail (preassembly) testing

sv51macross · 11-22-2010, 02:36 AM

Tomorrow (okay, this morning) I'm going to be reassembling Lucy's fuel system with four replacement injectors and all-new grommets/O-rings, and a replacement PD. Here is a photo as best as I could take of the primary rail.

http://sadpanda.us/images/285598-ER3BLVO.jpg

It seems that the fuel is leaking from the top of the leading injector and the wetness on the rest of the rail/PD is just 20 years of dust wicking and sticking the fuel. Obviously, I'm going to replace the injector and rubber seals, but is it wise to not replace the rail/PD? The engine only has about 80k on it, and the replacement rail/PD has 64k on it. If it is prudent not to replace the PD and keep it on hand as a spare, how should I store it so as to prevent further degradation of the internal rubber diaphragm?

Lastly, to make sure the PD is not leaking, I want to pressurize the fuel system. I was going to button the rails back together and use duct-tape to hold the injectors in their rail bosses. After that, plug the pump back in and hot the ignition. Is this a bad idea?

11-22-2010, 02:36 AM	#1
sv51macross Rotary Fan in Training Join Date: Oct 2010 Location: Ann Arbor, Mi Posts: 47 Rep Power: 0	Fuel rail (preassembly) testing Tomorrow (okay, this morning) I'm going to be reassembling Lucy's fuel system with four replacement injectors and all-new grommets/O-rings, and a replacement PD. Here is a photo as best as I could take of the primary rail. http://sadpanda.us/images/285598-ER3BLVO.jpg It seems that the fuel is leaking from the top of the leading injector and the wetness on the rest of the rail/PD is just 20 years of dust wicking and sticking the fuel. Obviously, I'm going to replace the injector and rubber seals, but is it wise to not replace the rail/PD? The engine only has about 80k on it, and the replacement rail/PD has 64k on it. If it is prudent not to replace the PD and keep it on hand as a spare, how should I store it so as to prevent further degradation of the internal rubber diaphragm? Lastly, to make sure the PD is not leaking, I want to pressurize the fuel system. I was going to button the rails back together and use duct-tape to hold the injectors in their rail bosses. After that, plug the pump back in and hot the ignition. Is this a bad idea? __________________ 1990 Mazda RX-7 NA; Lucy, after the main antagonist from Elfin Lied. Eventual plans? Something cyberpunk and spicy.