1997 OBS Hiccups.

[SFDEDIESEL]

I have a 1997 ford f350 crewcab 4x4 with 119,xxx miles. The issues I am having has put between a rock in a hard spot. Truck runs and drive as it should I don't notice anything different with it idling, but when you go under hard acceleration the truck hiccups as if there is an air pocket in the fuel system, I have replaced the fuel bowl (400 bucks) and the fuel pressure sensor. I have also cleaned the both fuel tanks and replaced the fuel pump in the tanks as well. I have been fighting this for 2 weeks and need some help.

 

[heavydoc]

I have a 1997 ford f350 crewcab 4x4 with 119,xxx miles. The issues I am having has put between a rock in a hard spot. Truck runs and drive as it should I don't notice anything different with it idling, but when you go under hard acceleration the truck hiccups as if there is an air pocket in the fuel system, I have replaced the fuel bowl (400 bucks) and the fuel pressure sensor. I have also cleaned the both fuel tanks and replaced the fuel pump in the tanks as well. I have been fighting this for 2 weeks and need some help.

A 97 has the fuel pump in the engine valley. The tank is just the fuel pick up and level sensor.

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[ghohouston]

Does the selector valve switch tanks properly? Mine failed in between positions, and made my truck hiccup horribly. Idled fine, under load, would hiccup and die.

 

[superpsd]

Describe the hiccup?

 

[79jasper]

Unplug the ICP sensor and see if that makes a difference.

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[OBS-Addiction97]

Check fuel pressure while wot.