Cadillac Repair: 97 deville, oil pressure sending unit, check fuel

Question
My 97 deville will into start.  the check fuel system banner comes across the dash when i try to start the car.

this all started about a week ago, I was driving and the speedometer (Digital) started jumping around and the cruise control stopped working.  Then the speedometer would be fine for a day or two and do it all over again.  Then the oil light would come on , but only when the engine was warm and idling.

Are these related or are they all separate problems?

I currently have 180,000 miles on this car and it has been running well up to this point.

thanks for your help

Jim

Answer
The speedometer could be caused by a faulty speed sensor located on the transmission which will automatically shut off the cruise control.


Have the oil pressure tested with a known good gage as it may just be a faulty oil pressure sender.

Have the fuel pump tested for proper pressure and volume. When was the last time you replaced the fuel filter ?.

A faulty oil pressure sending unit and or low fuel pressure will cause the car NOT to start.