If the analyzer showed -100%$ on the ST and LT Fuel Trim, didn't the PCM think the engine was way too rich and it was trying to go full lean?
I've been fighting the MAF CEL for months. Today, for the first time, the engine really bogged down during a moderate acceleration in 2nd gear. The CEL flashed for about 10 seconds, then the engine picked back up. I then had a new MAF CEL and a "pending" Random/Multiple Cylinder Misfire Detected.
Most of the Saab sites would point the finger at the MAF...8 years old and 52k miles.
Not sure how how to troubleshoot the MAF. I've cleaned it twice. Pulled it out and got 4kohms and 9kohms across various combinations of the three pins. With the engine idling, the plug for the MAF show 12 volts and 5 volts.