flashing check engine light on 99 mgm

Hi,

I just bought my in-laws with 76,000 miles. This weekend the Check engine light was flashing (not solid) and would go out for a while and then come back on. I looked in the manual and it says to drive moderatly and have it checked out at the dealer (can you say $$$$). There is a rotten egg smell coming out the exhaust and it is running rough. I just replaced the PCV valve. I have not had the codes looked at yet.

Any ideas or recommendations?

Thanks in advance for you help!!

John Cmarik

A flashing ck engin light is the sign that the car has a misfire code stored
ck ignition system

Rotten-egg smell often indicates a catalytic convertor problem. Check the codes and see what they tell you.

Thank You. I will have it checked at Auto Zone.

To let everyone know it was the resistor on the #8 cylinder. 50 bucks to fix. the guy at Auto Zone did it for me.