my rpms jump around when it started it only did it once in a while but only after the engine was warm now it is doing it all the time my o2 sensor spark plugs wires fuel filter and the cap and rotor have been recently replaced and i checked my fuel pressure and it is fine if anybody has any input it would be much appreciated.

 

I was just recently having this problem every single day. I haven't quite fixed it yet but I believe I know what it is. Check your ignition wire that runs from your distributor to your ignition coil. And you may want to check the coil itself as well. The coil gets pretty hot once the engine has warmed up. Just my

 

I FIXED IT TODAY IT WAS THE #1 SPARK PLUG WIRE THANKS