1993 Ford Taurus OIL LIGHT ON

Engine Performance problem
1993 Ford Taurus 6 cyl Automatic 124000 miles

I HAD THE RACK REPLACED AND NEW BRAKES IN THE FRONT AND BACK, NEW TIE ENDS AND BALL JOINTS ON THE FRONT, A NEW BATTERY, POWER STEERING PUMP, AND WATER PUMP AND IDEL ARM. I BROUGHT IT HOME AND DISCOVERED A LEAK UNDER THE CAR. I TOOK IT BACK AND THEY TOLD ME THEY FIXED IT BUT THEY BROKE THE MUFFLER OFF IN THE PROCESS. I REPLACED THE MUFFLER. BROUGHT IT HOME. DROVE IT ABOUT 25 MILES AND THE CHECK ENGINE CAME ON. I TOOK IT BACK AND THE CODES READ O2 SENSOR. REPLACED BOTH OF THE SENSORS. BROUGHT THE CAR HOME. TOOK IT IN FOR AN OIL CHANGE AT A FORD DEALERS. HE CHANGED THE OIL. I DROVE HOME, 7 MILES, WENT INSIDE THINKING THAT MY CAR WAS FINALLY FIXED. THE NEXT DAY I WENT OUT AND STARTED MY CAR AND TOOK OFF. I DROVE ABOUT 30 MILES AND THE OIL SENSOR LIGHT WENT ON. I TOOK IT BACK TO FIND OUT WHAT WAS GOING ON AND WAS TOLD THAT THE OIL PRESSURE SWITCH WAS BAD. THEY REPLACED IT. ON THE WAY HOME THE OIL LIGHT STARTED FLASHING. I CALLED THEM BACK AND THEY TOLD ME TO DRIVE IT A FEW MILES TO SEE IF IT WOULD STOP BECAUSE SOMETIMES THAT HAPPENS WHEN IT IS REPLACED. I DROVE ABOUT 10 MILES. NOT ONLY DID THE OIL LIGHT COME ON AND NOT GO OFF BUT THE TEMP STARTED TO GO UP. IT WAS JUST UNDER RED. I TURNED THE HEATED ON AND THE TEMP WENT DOWN. I CALLED TO SEE IF THEY KNEW WHAT IT MIGHT BE. THEY TOLD ME THAT I NEED AN OIL PUMP, BUT IT WOULD BE EASIER TO PUT A NEW ENGINE IN THE CAR. I HAVE PUT OVER TWO THOUSAND DOLLARS INTO THIS CAR IN THE PAST TWO WEEKS AND I DON'T WANT TO JUNK THE CAR, AT THIS POINT, BUT I NEED TO KNOW HOW HARD IS IT TO CHANGE THE OIL PUMP. WHAT DO THEY HAVE TO DO COMPARED TO CHANGING THE ENGINE. I SHOULD LET YOU KNOW I PUT A NEW STARTER, BATTERY, ALTENATOR, AND WIPER MOTOR INTO THIS 8 MONTHS AGO. PLEASE HELP ME. I WAS GOING TO BUY A NEW CAR BUT I ALMOST HAVE ONE NOW. THANK YOU.

updated 6-3-09
THANK YOU FOR YOUR HELP. I HAD THEM CHECK THE OIL PRESSURE IN THE CAR. THEY SAID IT WAS 50 PSI. THEY SENT THE CAR HOME, DRIVING IT 2 MILES. THE OIL LIGHT FLASHED ONCE WHEN IT HIT A BUMP SO THEY FIGURED IT WAS OK. I DROVE THE CAR ABOUT FIVE MILES AND THE OIL LIGHT CAME ON SO I HEADED HOME. THE TEMPERATURE GAUGE STARTED TO GO UP JUST UNDER THE RED WHEN I PULLED BACK INTO THE YARD. COULD THE OIL PUMP BE BAD BUT THE PRESSURE STILL REGISTERS 50 PSI OR DO YOU THINK IT IS SOMETHING ELSE. THANKS AGAIN FOR YOUR HELP.


WHAT IS THE DIFFERENCE BETWEEN THE OIL TEMPERATURE SWITCH AND THE OIL TEMPERATURE SWITCH? HOW DO YOU GET TO THE OIL TEMPERATURE SWITCH. IF THE OIL TEMPERATURE SWITCH WAS BAD WOULD IT MAKE THE OIL LIGHT COME ON AND WOULD THAT IN TURN MAKE THE TEMPERATURE GAUGE GO UP? THANKS AGAIN FOR ALL YOUR HELP.