SET THE TIME ON THE CLOCK. WHEN STARTING THE CAR AT A LATER, THE TIME HAS CHANGED. 2004 FORD EXPLORER.

Check the engine coolant temperature sensor and MAF sensor. The computer uses both of those to determine air/fuel mixture at cold startup

It should be in your owners manual. Depending on which radio you have, you either turn the radio off, push the clock button, then advance the time with the seek or tune button - or - push the clock button and put the time in using the number buttons then push the clock button again to store the setting.

Page 20 of your owner's manual for PREMIUM AM/FM STEREO/CASSETTE/SINGLE CD:
RDS: (Radio Data System): Press RDS to access the clock mode.
Setting the clock: Press RDS until SELECT HOUR or SELECT MINS is displayed. Press SEL to increase (◄) or decrease (►). Press RDS again to disengage the clock mode.

or

Page 26 for PREMIUM IN-DASH SIX CD SOUND SYSTEM
Setting the clock: Press MENU until SELECT HOUR or SELECT MINS is displayed. Use SEL to manually increase (▲) or decrease (▼) the hours/minutes. Press MENU again to disengage clock mode.

Do you have an owners manual? It will show you how in there otherwise I think you have to hold the "clock" button in and you can adjust the time with the "tune" button or the "volume" button, I'm not 100% sure.

Most common is the pressure switch on the master cylinder. If it is also leaking brake fluid, now is the time to get it replaced free at a Ford Dealer.

Setting the clock
Press CLK to toggle between
listening frequencies and clock
mode while in radio mode.
To set the hour, press and hold the
CLK control and press the SEEK
control:
Use arrow symbols to increase and decrease time

To set the hour, press and hold the CLK control and press SEEK. (Use arrows to increase or decrease hours). To set the minutes, press and hold the CLK control and press TUNE and use arrows.

This should work unless your vehicle has a separate clock module.(Other than the digital radio display).

check and make sure all the fuses are in good but it sounds like a bad ground wire

Hold in the clock button. While holding, press seek forward or backward to change the time.

check the crankshaft sensor they are good about going out on the explorers