1995 lumina apv

Hi i was wondering if someone can help me i have a 95 lumina van 3.8 and the van hesatation problem i replaced the air filter, and gas filter and i am running out of ideas i have tried differnt gas treatments still it wont go away if some one can help me thanks

One easy free step is to clean the Mass AIr Flow (MAF) sensor. Take it out with a few screws and clean the tiny wires with alcohol and care....a few years ago mine did what you described and some dirt had accumulated on the wires.
www.avigex.ca/xport/MAFArea.jpg
www.avigex.ca/xport/maf4864s.jpg

Do you have an injector thats bad or, when was the last time you did a tune up?? Just some basic ideas.

If you havent tried this , Try changing the gas line filters.

Never forget the faulty Throttle Positioning sensor... Your book so tell you how to test it... If I recall? with the key on engine not running measure the voltage at terminal b the voltage should read about .5V... Operate the throttle smoothly to full open and it should not exceed 5volts... if it does or the voltage jumps then replace.. check terminal A to ground for good ground... Check terminal c for 5volt reference signal...

If this is all good it my be a faulty PCM... Had a vehicle that stumble or lagged on take off and it turned out to be the PCM... Get a book and do some testing... 20 dollar book and testing can save you a bunch over plug and play..