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you are getting what is known as turbo surge, and there is a fix. it involves removing the turbo and changing the compressor and turbine wheels with more modern designs. google 7.3 turbo surge.
Is this happening under load towing or unloaded or anytime? Does it have a wicked wheel? I think early 99s came with a wicked wheel. Have him pull the intake boot and look and see if the intake vanes of the turbo have any dings or badly dusted (pitting on the blades)
Losing power and missing could be different things. I know they 7.3 injector harnesses can break and cause missing and loss of power. The harnesses are about 70 bucks and are under the valve covers.
He should do a buzz test on his injectors
Surging is when the turbo loads and unloads boost. Depending on the type of intake you may hear it more with a open filter type vs a factory sealed box
Is this happening under load towing or unloaded or anytime? Does it have a wicked wheel? I think early 99s came with a wicked wheel. Have him pull the intake boot and look and see if the intake vanes of the turbo have any dings or badly dusted (pitting on the blades)
Losing power and missing could be different things. I know they 7.3 injector harnesses can break and cause missing and loss of power. The harnesses are about 70 bucks and are under the valve covers.
He should do a buzz test on his injectors
Surging is when the turbo loads and unloads boost. Depending on the type of intake you may hear it more with a open filter type vs a factory sealed box
Does it do it at idle too?
I would check the wiring harness for the injectors. Pull the valve covers and check the condition of the harnesses. My buddy's 99 sounded like it was missing. I had a extra set of wire harnesses I bought but never used. Replaced them. Truck ran great. The harnesses break down after time. The harness is what tells he nor yours to function and open. If the harness is bad the injectors don't open and truck misses.
Does it do it at idle too?
I would check the wiring harness for the injectors. Pull the valve covers and check the condition of the harnesses. My buddy's 99 sounded like it was missing. I had a extra set of wire harnesses I bought but never used. Replaced them. Truck ran great. The harnesses break down after time. The harness is what tells he nor yours to function and open. If the harness is bad the injectors don't open and truck misses.
Thanks for all the help. I have check the fuel filter in the fuel tank and the fuel filter was dirty. Cleaned it off and now no problems
Thanks for all the help. I have check the fuel filter in the fuel tank and the fuel filter was dirty. Cleaned it off and now no problems
Look into what is called Hutch mod. The screens in the fuel tank pick up get really bad. Ford won't sell just the screens. At least they didn't when I looked for some. Also the fuel filter in the bowl should be changed too.
Be careful with the drain valve. They break and leak. So if you need to drain the bowl have a drain repair kit handy.
Is this happening under load towing or unloaded or anytime? Does it have a wicked wheel? I think early 99s came with a wicked wheel. Have him pull the intake boot and look and see if the intake vanes of the turbo have any dings or badly dusted (pitting on the blades)
Losing power and missing could be different things. I know they 7.3 injector harnesses can break and cause missing and loss of power. The harnesses are about 70 bucks and are under the valve covers.
He should do a buzz test on his injectors
Surging is when the turbo loads and unloads boost. Depending on the type of intake you may hear it more with a open filter type vs a factory sealed box
THe wicked wheel was and is an aftermarket turbo wheel. Nothing factory about it.
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