Jesus Freak
Full Access Member
They're all the same. Get new orings.I've got a local U-pull yard with a good selection of complete 7.3 IDI's. Will the 7.3 injectors can caps work with the 6.9? If so, I'll pick one up this weekend.
They're all the same. Get new orings.I've got a local U-pull yard with a good selection of complete 7.3 IDI's. Will the 7.3 injectors can caps work with the 6.9? If so, I'll pick one up this weekend.
I've got spare o-rings. I think the injector itself is fine, but it'd be good to pick up one or two while I'm already in the yardThey're all the same. Get new orings.
I know you can get the o-rings at TSC. Anywhere in particular you can get the washers?...and new copper washers. And make sure the old washer comes out. They often don't come out with the injector so you'll have to use a pick to dig it out.
They're all the same. Get new orings.
I had a Ford engineer on another board correct me when I said the fuel leaking in the return system from the injector was to cool and lubricate the injector. He got into this long explanation which I have forgotten mostly, but what I do remember is he said a brand new injector will have little to no flow into the return system, and as something inside the injector wears, the return flow will slowly increase with the age/miles on the injector.Here is the facts to answer some questions.
1st- injectors are not cooled, the caps are there to capture the "leak off" fuel that gets past the pintle.
2nd- the only way that cap melts is if the injector pintle sticks open, combustion gas goes thru and melts the cap.
3rd-This can happen for many reasons, yours was the loose injector. Torque is 35ftlbs, I've been torqueing to 40ftlbs for 20 years.
I recommend a new install kit.
Your injector tip is likely stuck. You can disassemble it and see. I have some good used if you need. free if you buy the kit.
Russ Repair
russrepair.com
So are the injector outside dimensions the same but the hose size is the main difference? Does that mean that R and Ds return rails work for 6.9 and late 7.3s?They’re not all the same. The 6.9 and some early 7.3 caps used 3/16 in hose, the later 7.3 caps used 1/4 in hose.
So are the injector outside dimensions the same but the hose size is the main difference? Does that mean that R and Ds return rails work for 6.9 and late 7.3s?
Billet Injector Fuel Return Rails | R&D IDI PERFORMANCE
Replaces the leak prone factory hose based return system with solid rails and includes Viton O-rings.idiperformance.com
But the fuel does cool and lubricate the injector pump.I had a Ford engineer on another board correct me when I said the fuel leaking in the return system from the injector was to cool and lubricate the injector.
This is exactly accurate. That's why it's called leak off it's what leaks past the machine parts.I had a Ford engineer on another board correct me when I said the fuel leaking in the return system from the injector was to cool and lubricate the injector. He got into this long explanation which I have forgotten mostly, but what I do remember is he said a brand new injector will have little to no flow into the return system, and as something inside the injector wears, the return flow will slowly increase with the age/miles on the injector.
And this is why it has a fitting for an outlet on top so the pump is always full of fuel preferably bubble free.But the fuel does cool and lubricate the injector pump.