So I've had a sputter around 2000 - 2500. Replaced cap, rotor, plugs, wires, o2, tps, fuel filter, cleaned tb, checked alternator (takes load and runs good voltage) worried about volt gauge seems to show low volts. Looked into vacuums lines And about to replace them, new injectors, air filter, exhast including cat. Did not do coil yet and want to go over grounds today.
Ok I know that's a lot to say before I tell you what it's doing. It started bucking going down highway. Like a jolting feeling, noticed it doing it more and more in lower gears. The other morning cel came on and I got the usual 12, 33, 55 but also 21 o2 sensor or circuit. Replaced o2, ran great for about a week, then back to bucking and sputter. (Bang head )
Not sure where else to go from here. I plan on getting my hands on a fuel pressure gauge but till then I need to get some ideas.
Any help is appreciated and its a 1995 2.5 five speed with 191,000 on original motor.