Last thing on sounds that may be other things but I may as well mention it: I get a whirring, air blowing whistling sound taking off from stop in the first 10 mph I get a noise underneath the middle of the car "almost" not always exclusively going up inclines in the 35 to 40 mph range and ...

Forgot to mention. I bought this 3 weeks ago. The owner let me know the engine light had just came on and the shop read the codes and replaced the spark plugs and ignition coil #4 to address this. This is driven rarely by us and the codes, maybe the ones I'm getting are new ones that showed up maybe...

2009 Pontiac Vibe 2.4 L *only shakes at stop signs and stop lights, as soon as brakes are released and i hit the gas the shake goes away *doesn't shake in park or while driving I was getting both these codes: P0420 & P0301 I replaced Upstream and Downstream O2 Sensors and the gas cap, cleared co...