This just started. When cold as in the morning...not much below 50 degrees outside so not that cold, the van starts just fine and then starts to sputter and spit...and sometimes runs fast almost as if someone was pressing on the gas...then sputters and almost dies....sounds like plugs mis firing but then it goes fast again....if you try to drive it will sometimes stall. After it warms up it runs like nothing has ever been wrong. This all seemed to start after my last fill up. Put some gas and fuel injector cleaner in the tank and two bottles of 90% rubbing alcohol in case it got some water in the tank.
Does this sound like fuel pump or fuel filter? I sprayed carb cleaner into the fuel injector carb while running and cleaned the contacts in the cap and cleaned the contact on the rotor. Nothing helped.
Any ideas on what to replace or check next?