It could be a sensor, but then again it could be something like a fuel or air filter. If the engine is not getting enough fuel or air it could cause this issue. When was the last time the filters were changed? Does the tachometer drop at all when it is acting up?
i havent changed thefuel or air filter, inot sureabout the rpms because i was paying attension to se if the engine light was comming on.
come to think of it does go down alittle bit
If it is dropping a little it could be the crankshaft position sensor is failing. The rpm signal is sent by this sensor. I would start with the filters first and see if it takes care of it. Even if it does not they need changed. If the fuel filter is plugged it will cause the fuel pump to die prematurely.
it seems like it start messing up when you got behind somebody slow and took your foot off the gas.
I would definately try the filters.
thanks i will try that first
by the way , the problem to my November 2012 question was spark plug grommets were letting oil in the spark plug holes on two cylinders. that should help you guys when next person has the same symptoms on coil pack type engine