For the past few weeks, my 02 monte ss 3.8 has been sputtering, bogging down and it has stalled. I notice it happening when I hit 70 mph. I through a computer on it and it said the oil sending unit was bad. Checked it and it was passing oil out! I changed it then for ****s and giggles replaced the fuel filter. It seemed fine for a couple of days then today I was up tp 70 mph again and it started giving me the same problem. The tachometer was also going crazy. Anyone have an idea? Tia!

 

I'd throw a scan tool on it and see. If its running that bad, there's likely at least a pending code. You can also check out the sensor readings to see what the computer is seeing.

 

ok, scanned the car and it send oil pressure sending such. Checked and it certainly was! Fixed it and I was on my way then it started doing it all over again! How can a second switch go bad that fast?

 

Car fixed!!! It was the ignition module!!!!

 

Awesome!