My 1995 oldsmobile ninety eight is doing real bad jerking like its bout to run out of gas.have a fulla tank

needs a fuel system flush

make sure you have as little gas in the tank as possible, unplug tank , usually up near top or tank if possible , unhook gas fill tube from fuel door area , (screws usually inside fuel door), unhook fuel lines from tank closest to the tank as possible, place jack under fuel tank and slightly tighten to tank, release tank straps and lower jack, roll out free from under vehicle and remove pump from tank, reverse process to reassemble.

the switches are corroded or worn--need to aquire a repair book for details-

It is in the gas tank. You would have to drop the tank to get to it.

The timing chain sounds like it probably jumped. Unless you have worked extensively on cars, have a professional take a look at it and the timing chain will need to be replaced and the gears realigned. Let me know how this works out for you.

Benjamin

Gasoline Fuel Filter There are three types of fuel filters; internal (in the carburetor fitting), in-line (in the fuel line), and in-tank (the sock on the fuel pickup tube). CAUTION
Before removing any fuel system component, always relieve pressure from the system.
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Check near the gas tank behind it in the fuel line.

It would be located towards the rear of the vehicle. Most likely either to direct rear of gas tank or front of gas tank.

For 1995 Oldsmobile 98 3.8L SFI OHV 6cyl the Fuel Filter is located under vehicle, passenger side, below seating area, front of fuel tank, mounted on frame in fuel line

Hope helps (remember rated and comment this).

Replace plugs and wires at the same time.

Have free scan for codes done at Autozone or Pep Boys, and go from there. Eliminates guess work & unnecessary parts replaced.