I have a 2003 ford expedition that wouldn t start i changed the battery and the starter .the vehicle still wouldn t start so i went to the manual it stated to turn the key forward rapidly 8 x's an

SOURCE: truck hesitates & stalls

Check for leaking valve cover gaskets,next to the spark plugs, putting oil near the ign coils. You absolutely have to scan the veh for codes and look at all the sensor values etc. Including putting an oscilloscope on all sensors. The Throttle Position Sensor is a possible and I could go on. Now,do not throw parts at it. Never replace anything just because of a code that is set. Codes do not mean a bad part, just an out of range sensor etc over a number of drive cycles. You have to spend lots of time and if you do not have the up to date knowledge on todays veh systems your done before you start. Don't mean to be hurtful but very few people can solve these issues including half the auto repair industry because there is no training for the most part and no one understands basic electricity or electronics. Todays vehicle are not just mechanical alone as back in the 1960's

SOURCE: 2004 Ford explorer will not start

Sounds like connections or cables. They may appear to look good but if they are aftermarket terminal ends they get corrosion under the bolt down clamp that holds the wires in. If they are factory cables that are molded on to the ends of the wires the same thing can happen. The easiest and cheapest thing to try is to put aftermarket terminal ends on the cables. Make sure you wirebrush the ends of the cables after you strip them and tighten them evenly and securely. Also clean the battery side thoroughly. If this doesn't work check the starter relay. Its the first place the red cable bolts to after the battery. Check the connections and try putting a jumper wire between the battery positive cable and the small terminal marked with an "S". One of these solutions should take care of this.

SOURCE: 1999 Ford Expedition - fuel pump not working after replaced alter

replace the fuel pump

SOURCE: my 2003 ford expedition has a hard time starting

starter is drawing to many amps for the battery. defective starter.

SOURCE: ford focus 1.8 tdci MY 2003 terrible cold start

Possibly is your glow plugs, best to change then all yourself if you can with just a ring spanner and a deep seated socket. Also not enough power in battery to heat plugs up in first place can be the cause. When deisels have been started a few mins, usualy start without waiting for glow plug to go out.