2007 FORD EXPEDITION Unknown Or Other Problems

My front passenger door has to be pushed heavily to open UNKNOWN REASON WHY

MY EXPODITION HAS A BAD GAS SMELL AND SKIPS A LITTLE PLEASE HELP ME

ALWAYS WHEN VEHICLE IS IN LOWER GEAR, WITH RPMS BETWEEN 1-2, THE VEHICLE WILL SUDDENLY BEGIN TO VIBRATE/SHAKE AND FEELS LIKE YOU'RE RIDING OFF THE ROAD ON AN INTERSTATE (LIKE THE SPEED RIDGES IN THE PULL-OFF LANE. IT IDLES GREAT, SEEMS TO CHANGE GEARS SMOOTHLY (AUTOMATIC). SOMETIMES THE VIBRATION IS MINIMAL BUT OTHER TIMES IT'S QUITE NOTICABLE, BUT USUALLY LASTS LESS THAN 15 SECONDS. IF THE RPMS ARE OVER 1.5 IT ONLY DOES IT LESS THAN 5 SECONDS. I WONDERED IF IT IS FAULTY MOTOR MOUNTS OR TRANSMISSION MOUNTS? I'VE HAD TIRES ROTATED, BOUGHT A NEW SET OF TIRES, SHOCKS ARE FINE. I'VE TRIED EVERYTHING.

I REPLACED THE AIR COMPRESSOR AND IT WAS WORKING FINE BUT THEN STARTED BLOWING HOT AIR, THE MECHANIC CHECKED ALL THE LINES AND FOUND THAT THE EMERGENCY BRAKE CABLE WAS NOT SECURED CORRECTLY AND HAD RUBBED A HOLE IN THE HIGH SIDE HOSE AND WAS LEAKING REFRIGERANT OIL. NOW MY OPTIONS ARE EITHER DOING AWAY WITH THE BACK AIR CONDITIONER OR REPLACING THE HOSE WHICH IS $600.

AS SOON AS YOU START THE VEHICLE THE BATTERY SYMBOL DISPLAYS ON THE DASH, IT GOES ON AND OFF CHIMING REPEATEDLY, THEN SWITCHES FROM BATTERY SYMBOL TO WRENCH SYMBOL AND THEN MY ENTIRE GAUGE CLUSTER STARTS. EVERY LIGHT GOES ON AND OFF REPEATEDLY, THE RPM GAUGE AND MPH DROPS TO ZERO AND THE ENGINE CLUNKS REALLY LOUD (WHILE DRIVING), THE AC OR HEAT WILL COMPLETELY TURN OFF AND ON, THE HEADLIGHTS FLICKER AND DIM ON AND OFF AT NIGHT WHILE DRIVING, BAD VIBRATION, LOUD GROWL TYPE IDLE SOUND, THE RADIO SHUTS OFF, WHEN YOU TURN THE HEATER ON IT REPEATEDLY CLUNKS IN THE REAR OF THE VEHICLE UNTIL YOU TURN AC ON AGAIN OR SHUT IT OFF, REAR AIR SUSPENSION LIGHT GOES ON AND OFF WHILE DRIVING. THIS ALL HAPPENS WHENEVER IT WANTS. I SHUT OFF THE CAR AND RESTART AND THE PROBLEM WILL STAY GONE AND DRIVE NORMAL UNTIL...

THERE'S A GAS SMELL INSIDE THE VEHICLE WHEN THE ENGINE IS ON. ALSO WHEN HEATER OR AIR CONDITIONER IS ON. IT'S BEEN HAPPENING SINCE JUNE 2015.