1990 Buick LeSabre. I've got a trouble code in the computer of a 41, which could be a variety of things. All of these possible "issues" I have taken care of: Camshaft position sensor, ignition module, ignition coil pack, and mass air flow sensor. The oly thing that I have not yet replaced is the PROM chip in the computer. Seeing as how the car is 21 years old now, trying to find a PROM will be a pain in the you-know-where.
The car will start and run just fine for about 20-30 minutes, then it acts like the mass air flow sensor is going out (it'll spit and sputter then eventually die.) As I stated earlier, I havew replaced basically the whole ignition system including the mass air flow sensor. I even went back with standard OEM copper AC Delco spark plugs. This car does have 210,000 miles on it and runs like a chanp, when it runs that is.
I can't think of anything else that might be screwing up the ignition, minus the PROM. Any help from viewers of these blogs would be helpful.