There pay not be any power under acceleration if o2 sensors are bad, or if certain plugs are blown. This can also be caused by a bad battery or starter.Ê
Intake manifold air leak or you need to put some fuel injector cleaner in. Did you gap your plugs correctly?
i just changed the plugs on my 1979 frod 400 ci truck, and i had a similar problem. new platinum plugs, idles good in park, but feels like its slugish in acceleration. right now im actually getiing info on gapping my spark plugs and it sounds like that's what your car needs too.
could be a vacuum leak
If it is missing it is probaly a coil pack
recheck wires to plugs sounds like two are crossed
If the problem seems worse when it is damp out, it is more than likely the wires. Might as well put plugs in while it is in the shop, too.
Bad spark plugs, spark plugs wires, etc.
Check the air filter, fuel injectors, EGR valve and temperature sensor.
A compression test will help determine if the valves need to be worked on. Burnt or carbon build-up on valves will certainly affect acceleration.
If the plugs, plug wires, are good then suspect a vacuum leak somewhere.
Never put Bosch spark plugs into a US engine. Normally they fail. Use Motorcraft--good experience speaking!
Assuming you replaced the fuel filter, here are a few things to check, Spark plugs, Spark plug wires, Distributor cap and rotor,