How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask rpmdiag Your Own Question
rpmdiag, Tech and Instructor
Category: Cadillac
Satisfied Customers: 6698
Experience:  Since 1975
Type Your Cadillac Question Here...
rpmdiag is online now
A new question is answered every 9 seconds

My oil pressure light comes on when I start car and says

Customer Question

My oil pressure light comes on when I start car and says stop engine
JA: Have you checked the oil? How old is your oil pump?
Customer: Don't know how old pump is prob orgimal Oil is full on dip stick
JA: What is the model/year of your Cadillac?
Customer: 1999 eldorado
JA: Are you fixing your Eldorado yourself? What have you tried so far?
Customer: Yes Not much guy I bought it from says he replaced oil sending unit
JA: Anything else you want the mechanic to know before I connect you?
Customer: I just did alternator but light would come on b4 that I thinks radator is leaking would that have anything to do with it?
Submitted: 3 days ago.
Category: Cadillac
Expert:  rpmdiag replied 3 days ago.

Hi, I'm Ron and I will be helping you today.
Stand by for a moment while I prepare your answer.

Expert:  rpmdiag replied 3 days ago.

Sludge in the motor will cause this as well as a bad oil pump. Check the oil pressure with a gauge. If the pressure is good and there is no sludge, then you need a new oil pressure switch.

Thanks, Ron

Customer: replied 3 days ago.
Ok guy I bought car from said he replaced not that long ago and oil was replaced not that long ago but car had been sitting for a couple of months
Customer: replied 3 days ago.
Also just changed alternator I think radator is also leaking would this have anything to do with oil pressure light
Expert:  rpmdiag replied 3 days ago.

Once you have done my suggestions, you will know what is wrong, and NO to your other concerns.

Thanks again and please remember to rate me 5 stars and keep this link in case you need me again later on.


Expert:  rpmdiag replied 3 days ago.

If you are satisfied with my answer, I would greatly appreciate a 5
star rating now and I will still assist you after you have rated me
too if another question pops up. I don’t get credit for helping you
until you rate me.
Thanks again, Ron