I bought a 92 w250 auto 4x4 about a month ago.

Not sure if the pump has been tweeked or not.

Does anyone know the stock setting so I know where to start from?

I won't be able to get a manual until after the 1st of the year.

Thanks for your time.

 

Every pump is different they are set based on how much fuel they flow. So your pump may be 6 turn out at a stock setting and mine could be 7 at stock. There is a tamper resistant cap on the fuel screw from the factory so if it is still there it hasnt been messed with yet.

 

The fuel screw cap looks like it has been tampered with.

I have a hard time believing that every pump is different from the factory.

I would think each screw would be within a turn or so.

 

I think you would be surprised just how different every pump really is.

 

I'll agree with that. I've tuned many 1st gen trucks, and they're really all over the place from factory.

 

There is a search button up top give it a try and see what others have said about the subject. When doing fuel screw adjustments you always note how many turn you move the screw in case you want to go back to stock.