New to the forum. Hello. I have a 04 12f. Will hit around 40mph on gps and then start surging with little boosts of acceleration. Dash is foggy or id tell you the rpms. Here is what ive done so far- first test compression aroumd 200 on all. To rule out bad gas, i drained tank and added fresh non ethanol with alittle sea foam. Changed fuel filter, had fuel injectors cleaned and new spark plugs, no difference... Then i changed fuel pump( needed it cause strainer was falling apart). No change. Also checked the fuel relief valve and its working. Im lost.... Dont wanna just toss parts at it. Tps??? Stm/ IAC??? Any advise would be greatly appreciated.