Questionpurchased car and ran fine while test driving it . We drove it for about an hour then suddenly the engine started to knock . within a few minutes the knock went away and now it is missing profusely , Help . what should I do . is it ignition related ? fuel related ?
AnswerHello,
the key word is you bought it used- buyer beware.
You don't want to know what I have seen over the years to temporarily doctor a problem car just to get it down the road. Banana peels into a cylinder to take away a knock, trAns leak stop to the power steering, coolant leak stop to cover a bad head gasket. Lots of crooks out there selling cars.
If someone is buying a used Cadillac, it needs a 2 hour test drive! These engines are notorious for being junk from overheating issues.
Since it is used and I am not at the car, I am not going to guess on a diagnoses. I recommend taking it to a repair center (not Cadillac) now and they can put the diagnostic equipment on it and tell you exactly what is wrong and pray the problem is not caused and covered up from overheating.
If the engine is bad you cannot go used because you will get the samge junk. If so, a new engine will set you back an easy $4k.
This is worse case scenario and I just want you to be aware. Hopefully the problem is not serious.
If you look at my archives, you will see just how common overheating is in these aluminum engines. I would rate severe.
I owned over 20 Cadillacs. I love them, but they can be a money pit.
I traded my last Cadillac off last year for a Chevy.
Good luck!
