Revs every now and again when idling my engine begins to race

Is that NA or FI? Sounds like vapor lock.

knocked the ECT connector wires loose?
so my guess you mean, hot engine races,because cold engines all do that , by design.
racing idle hot.

1. engine not hot. thermostat bad.
2. engine hot and Ect Sensor lies, (wires fell off)
3. ISC valve stuck open or wires, bad to it.
4. vacuum hose knocked loose or you cracked it, now sucks air and engine races, (speed density EFI systems
5. .

lots more, but am lazy , on beach

Is it possible the clutch pedal is interfering with the throttle? Start the engine in neutral and allow it to idle. Press only the clutch pedal down and see if this increase the engine speed. If it does speed up the engine and slows back down when you release the clutch then somehow this operation is where your fault lies. If it doesn't alter the idle speed, then rev your engine and release the throttle to see if it returns to idle immediately. If it is slow to return to idle then your throttle cable could be sticking. This means when you change gear lifting off the throttle has little effect and depressing the clutch to change gear causes the engine to race as the throttle is still partially open.

High idle speeds on modern engines is in most cases caused by an engine vacuum leak.

Have you done anything to it. When was the last tuneup. And why the hell are you racing the engine to 5k. That's just wrong. It should idle around 800

ok..you must have more than one car???? you don't drive the 300 atall im guessing. #1 start car drive up the road and \back to your house. #2 let it idle till problem starts. #3 once it does start with the problem keep it alive with the gas pedal. #4 once your have it safely from dying in higher rpms "rev it" like a kid would, you know like if you were gonna race some one lol. be careful not to over rev or damage engine. you should do this for five minutes no longer than that. #5 let it idle for another 5 minutes. #6 repeat every day until problem with idling decipates. it took mine 3 300e like 3 days of this. if your not going to drive the car once you get the problem out of the way. turn the car on everyday and let it idle for 5 minutes atleast and take it for a short drive once a week. they get lonelly you know lol. later on you can just turn the car on every 2 -3 days and let it idle but still take it on a short drive atleast once a week

Insufficient information

hi,try to check the accelerator cable for free movement,or you may check the idle actuator spring or clean the idle actuator,ty

My engine light is on in my 199 ford explorer and I was told it is the o2 sensor 1 and 2 what does this mean?

GET AT DIAG. RAN ON THE VEHICLE, ITS THE ONLY WAY TO DETERMINE THE PROBLEM PAR