Re: 1958 Fuelie Break-In Procedure Help Needed
Justin, Your unit was tested with 100LL AV gas. If it was tested with good old corn fuel the pump would have been frozen.
Look in your shop manual aka Corvette Servicing Guide. Fuel Injection section 6M-25. Notice the antique electric drill being used. Use a high RPM cordless drill.
Someone wrote or called the other day asking which direction the drill go . Clockwise is the answer.
"It is recommended that a fuel nozzle spray pattern check be made when a major overhaul ....... is made. Use an air wrench or electric hand drill, etc to operate the gear pump while applying ORAL vacuum at the main control diaphragm to insure all fuel will pass into the nozzle circuilt. The nozzle spray pattern should be such that each bank of nozzles appear as a single spray when viewed from the end of the Injection Assembly (fig. 81.)"
First you need a cup of fuel in the fuel bowl.
Oral vacuum to main diaphragm Justin. Disconnect either of the two 1/4" vacuum lines that goe onto the brass "T" fitting on the round main diaphragm that is held on with 8 fillister screws. No you do not have to plug the other side of the "T". Then get a short piece of 1/4" line with a nut and ferrule on it so you can attach that to the brass "T" fitting. Then get a piece of 1/4" ID rubber hose about a foot long and push it onto the 1/4" line.
YOu are going to suck on this rubber hose when you turn the drill on. What that does is apply oral vacuum to the main diaphragm which in turn works the accelerator pump called "spill valve". Put the FI unit in a large pail, etc to catch the fuel. Support it well exposing the 8 nozzles.
When you turn the drill on and suck on the rubber hose you should see all 8 nozzles squirting fuel. That crude test tells you a lot.
Would have been easier to call me but maybe this will help someone else.
If your pump turns you should be alright Justin. Take a chance and skip the flow test. Put some fuel in the bowl and crank the engine over and start the mother.
Have faith. John
Justin, Your unit was tested with 100LL AV gas. If it was tested with good old corn fuel the pump would have been frozen.
Look in your shop manual aka Corvette Servicing Guide. Fuel Injection section 6M-25. Notice the antique electric drill being used. Use a high RPM cordless drill.
Someone wrote or called the other day asking which direction the drill go . Clockwise is the answer.
"It is recommended that a fuel nozzle spray pattern check be made when a major overhaul ....... is made. Use an air wrench or electric hand drill, etc to operate the gear pump while applying ORAL vacuum at the main control diaphragm to insure all fuel will pass into the nozzle circuilt. The nozzle spray pattern should be such that each bank of nozzles appear as a single spray when viewed from the end of the Injection Assembly (fig. 81.)"
First you need a cup of fuel in the fuel bowl.
Oral vacuum to main diaphragm Justin. Disconnect either of the two 1/4" vacuum lines that goe onto the brass "T" fitting on the round main diaphragm that is held on with 8 fillister screws. No you do not have to plug the other side of the "T". Then get a short piece of 1/4" line with a nut and ferrule on it so you can attach that to the brass "T" fitting. Then get a piece of 1/4" ID rubber hose about a foot long and push it onto the 1/4" line.
YOu are going to suck on this rubber hose when you turn the drill on. What that does is apply oral vacuum to the main diaphragm which in turn works the accelerator pump called "spill valve". Put the FI unit in a large pail, etc to catch the fuel. Support it well exposing the 8 nozzles.
When you turn the drill on and suck on the rubber hose you should see all 8 nozzles squirting fuel. That crude test tells you a lot.
Would have been easier to call me but maybe this will help someone else.
If your pump turns you should be alright Justin. Take a chance and skip the flow test. Put some fuel in the bowl and crank the engine over and start the mother.
Have faith. John
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