94 SN 2 dead Holley Fuel Injectors

Hey all,

I have a 1994 SN with the 5.8 Pro Boss with TBI. I have 2 bad injectors and am needing replacements. I do not want to steer away from what I already have. Any idea where I can get 2 of these injectors??

I have the same engine -- 1994 throttle-body electronic fuel injection. 4-5 years ago, the EFI started acting-up. One of the 4 injectors was bad and was dribbling fuel rather than spraying and atomizing the fuel. The engine ran quite rich at low throttle settings and hole-shot was very poor. I started looking around for new/replacement injectors. The injectors were: Holley (part number) 250R-123AA.

I tried E-bay, PCM, Holley, etc. No luck. Per Holley, that injector was discontinued over 10+ years ago and that replacements were no longer available (NLA). Holley did have an upgrade kit, but the cost was about $600. I was considering this Holley throttle-body EFI upgrade, but the engine management system "Pro-Tech" was also having intermittent problems. I knew that I needed some type of engine management system for EFI to function, so I called PCM to inquire about the Pro-Tech problems that I was having.

No joy there either. PCM told me that Pro-Tech parts were discontinued 10+ years ago and were NLA. That info from PCM made my decision easy as I needed Pro-Tech for the new Holley EFI upgrade. That was not going to happen now, so I chose to retro-fit the engine back to distributor and carburetor.

Several good threads on this site for those who have gone this route and made the "old school" switch as I have. FWIW, I went with a QuickFuel M-600 carb and a Davis Unified Ignition (DUI) distributor with integrated coil. When I installed these retro-fits on the engine, I was fearful that performance would be down as I was going from EFI to carb. With the QuickFuel and DUI combo, the engine performance is very close to original.

JQ

I got to talk with my buddy today about your fuel injectors. He stated finding injectors is not an issue at all. Bosch sells injectors, what you will need to know is how many gallons per hour they are rated at.
He also stated that these old Ford injectors were not that efficient, the spray patter was not ideal for atomization of the fuel and air.   He says the new Bosch will work so much better you might end up with those cylinders making more power than other cylinders.
He recommended changing all 8 if you can't find the exact replacement.
He noted Fuel Injection cleaning shops normally have inventory in their shops to match customer needs. He said if you need one or two call the local shops that clean injectors and see what they have available to match what you have.
Your old injectors will have part numbers on them to help identify them.
Hope this helps.

Maybe the info helps another member down the road.
Those were some great old movies.