1996 F350 7.3 low power

[79jasper]

Not really a screen that I know of, just a check valve type thing.
It's in the fittings where the lines enter the heads.
You can get "high flow" ones from RiffRaff.
They advertise them as for the 99-03.
I know our trucks have the fitting back there. I just don't know if ours have the check valve or not.

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[Diablo Blanco]

Cold buzz test generated the same fault. However, cylinder 8's was considerably quieter.

 

[79jasper]

Be sure to ohm the harnesses.
Could just be a bad injector.

You could swap that injector to a different hole and see if the fault follows.

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[Diablo Blanco]

I have splices in the wiring harness above the drivers side valve cover. Is that something I can buy new or will I have to make one/repair?

 

[79jasper]

Splices?
You can get a pigtail.
Don't skimp, Motorcraft only.

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[Diablo Blanco]

I just did the bb mod and it made a night a day difference!!

 

[Diablo Blanco]

Im not making any boost until 2500 rpms and then the max I have seen is 10 psi both loaded and unloaded. Is this normal?

 

[79jasper]

A little low.

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[Diablo Blanco]

Pull the valve covers today and the number 8 cyl has a "LL" injector in the hole. The other 7 look factory, the LL was replaced recently. Unless I'm mistaken, a '96 should have 8 AA's

 

[79jasper]

Is your truck the cali model?
The LL is normal for the newer trucks. Search 7.3 powerstroke cackle.
But I don't think it was used in the older trucks.

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[Diablo Blanco]

I don't think its a cali model, it came from deep alabama. I will check the vin

 

[79jasper]

Or look for the dampener on the fuel pump.

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[Diablo Blanco]

No dampener!

 

[79jasper]

Then I would say that's a incorrect injector most likely.

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[trackspeeder]

It's possible that the #8 injector was swapped out during warranty work at some point.