1995 Buick Park Avenue Base 6 Cyl 3.80L
Why does motor surge trying to go steady speed
RPM gauge jump up & down like fuel or air , changed fuel pump ,coil packs and module
Before replacing any parts - always thoroughly test and diagnose. For example - what was the fuel pressure at the fuel pump outlet and also at the fuel rail at the engine? What was the coil output voltage? What is the fuel filter condition? Is the filter blocked?