I changed the oil in my 2002 Taurus 3.0 Flex Fuel motor an d there doesnt seem to be any oil in the old filter. Any thoughts oon this?

The valves do have adjustment. Details in the link.

https://www.google.com/search?q=kohler+25+hp+valve+adjustment

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Could be bad fuel pump or plugged fuel filter. At least change the filter to see. don-ohio (:^) AmanStino Ultra Slim 4 Port USB 3 0 Data Hub white AmanStino

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I think you were on the right track with the fuel filter change. I would purge the system. My guess is that you still have some debris in the tank which is causing a FLOW problem. You can have a restricted flow and still have sufficient pressure to start the motor and run for a brief period, but at highway speeds where the amount of fuel is as important as the pressure it seems to be falling off. Reinspect the fuel system for debris and/or restrictions. Good luck.

Does it work on any speed..If not check the relay..If it works on high only,,its the fan resister..If all fails you have to unhook the the fan wire and check for voltage with a test light or multimeter..If you have voltage then the motor is bad

Aside from a mechanical issue, or incorrect fluid level, you may want to consider having the transmission flushed. The fluid gets tired and dirty over time and will decrease transmission performance. The fluid should be red in color. If its brownish or almost black its time to have it changed.
There are lots of things that can affect the engine and transmission. Mainly: Air Filter, Engine Oil and Oil Filter, Plugs and Plug Wires, Transmission Fluid, and the Fuel Filter. If you dont know how old these items are, or if they are the originals I recommend you replace them. Any of these alone can contribute to the issue you mentioned.

Maybe, maybe not, It's most likely a bad rear seal or worn main bearings but check the oil filter just to be safe. Sometimes things go wrong when changing the oil filter that can cause similar symptoms.
1) old gasket left behind.
2) cross threaded filter.
3) loose filter.
4) damage gasket or defective new filter.

try tuning it up, spark plugs and wires, maybe the fuel filter.

I would change the fuel pressure regulator first, if no change in pressure the fuel pump is on the way out.I have a 01 silverado 4.8 and my fuel pressure is between 55and60 psi.

men you need to have a tune up, change the plugs, wires and air filter and the oil transmission, and if is doing the same your transmission is bad