Cadillac Repair: 1998 Cadillac deElegance Starting trouble, fuel pressure regulator, position sensors

Question
Sometimes it starts other times it turns over but don't start,  sometimes it starts but runs really rough,I have had a new fuel pump, a relay switch and changed the fuses, what is the problem?

Answer
Hi Donna,

    With a problem such as yours you or your mechanic will need to do some testing to find out whether the problem is no spark or a no fuel condition when it doesn't start. At that point I can give some suggestions of tests to do. A good thing to do would be to check for codes as that might lead to the fix.

   Otherwise problem areas could be the fuel pump, fuel pressure regulator, ignition control module for the coils, coolant getting into the cylinders, bad crankshaft position sensors or a bad engine computor to name several things. As you can see testing would be important or you could spend $500.00 and still not have it fixed. Bill