Avguy,

Thanks again for the timely advice and wisdom. I put the rear of the car up on jack stands to get a better view of the canister along with its associated hoses and valves. Although I didn't see any cracks or obvious damage due to the undercoating overspray , I started the car and sprayed the valve with starting fluid to listen to any changes in the tune of the engine. After about 10 seconds, the engine idle seemed to smooth out for roughly 30 seconds. Granted, this was the first start of the day so the ECM may have been running through its normal cycle. Still, the check engine light shut off and the car seems to run fine without any hesitation during sudden acceleration or moving from a stop.

Out of curiosity, I priced a new valve. Online, Auto Zone sells them for $34.99 before tax. Since the light is out, I informed my daughter to notify me if the light comes on again. I am considering the purchase and repair if the problem returns.

Also of note, I was interested to see that the lines are plastic rather than the fuel resistant rubber type of bygone eras. The hose located at the 9 o'clock position of the valve appears to have one of those odd looking clip fasteners where the one on the 2-3 o'clock position is of the spring clamp variety. During your repair, did you reuse the old clip (9 o'clock position) and how did you remove it? Thanks again.