My car's check engine light

Spark plugs and wires at 98000 miles. Coolant flush about a month ago.
Thanks for the reply. I'll have the codes checked tomorrow.

Car is running and sounding rough-I have replaced vacuum hose, spark plugs, boots and coil packs and the check engine light is still on it will stay on for about 30 seconds then flash for about 30 secs and this will continue the entire time i'm driving. Had a diagnostic check done and it came up 3 codes vacuum Hose, misfire, and sensor (didn't say what sensor). The engine is a 96 grand am the body is 97 sunfire. Can anybody please help me? I am at my wits end! Thanks in advance!

I was driving home and my engine light pops on, so after I was driving for a couple of mins the car had a little shake to it and seem like it wanted to cut off tha twhen the engine light start blinking, after bout 3 mins it stop and the engine light stayed solid. And a ETS light came on with it. Can u tell me wat going on with that

On my 1996 Grand AM the check engine light and the ETS off light is on, what do this mean? Also where is the rear defrost control for this car located. Thanks guys.

I have a 96 Grand Am w/169k, 4 cylinder GT, manual.
I picked up the car about 6 months ago and the Check engine light would light up at cold starts. It would sometimes go off after driving around. I assumed this may have been an O2 sensor, as the car would have the "stinky" exhaust smell at start up. Also, when I got it it tended to jerk occasionally as if the clutch was slipping. It didnt happen all the time, more so after driving for a while. Recently, I was accelerating to get on the highway, when the car just seemed to lose power. The more I depressed the gas pedal, the more it tended to slow down. If I took my foot off the gas a bit, it seemed to find a sweet spot where the car would accelerate more, but still slower than normal. As I got into normal stop and go traffic, I noticed that the car was running very rough. If I gassed it in park, it would putter like it was flooded. My guess is that a plug or two got ruined, and the car is not running on all cylinders. I was also told that it could be a problem with the fuel regulator. I have scanned the car for codes, but none come up. The car also, at times, would rev much higher than normal at idle. This also happened after driving around for awhile.

Any Ideas?

Could be the coil pack as well!

Thanks for the insight.

Computer problem
1996 Pontiac Grand Am 4 cyl Front Wheel Drive Automatic

CHECK ENGINE LIGHT CAME ON, I SCANNED FOR CODES AND 2 CODES APPEARED. FIRST CODE IS 137- 02 SENSOR CIRCUIT LOW VOLTS ( BANK 1 SENSOR 2 ) THE OTHER IS 172- SYSTEM TOO RICH ( BANK 1 ) I NEED TO FIND OUT WHAT THIS MEANS, AND WHERE THESE SENSORS ARE SO I CAN R & R THEM. THE CAR RUNS ROUGH WHEN YOU FIRST START IT AND YOU CAN SMELL A LOT OF GAS, AND SOMETIMES IT WANTS TO STALL AT A STOP.