92 Tempo, Wait till you hear this!

Hi guys! Problem(s): '92 Tempo, 4 cyl, 86,000 miles, I am really confused at this one. After I've been driving for upwards to an hour or so and the weather is warm outside the car seems to want to stall out (and has recently) at about 60 mph or so and is hesitant when I push on the gas to get past 60, then the rpm's and speed go haywire. This only seems to happen when its a warm or hot day though. The car stalls on the highway and in the city, and loses all power, check engine light cycles on and off, and all the interrior lights go off, and now the door chimes cycles on and off as well when it feels like it.
And I don't know if this would be related to the same problem but I'm changing my air filter almsost once a week because I'm getting oil/gas/water spraying into the air filter housing. Whatever it is it's yellowish milky color and smells like fuel.
You fella's have any ideas/suggestions? Oh yes also forgot to mention it's fuel injected, I can hear the fuel pump when I go to start it, so I don't think it's a problem with the pump.