2002 Chevy Blazer Will not fire

[quote="jerryarlie"]Other Category problem
2002 Chevy Blazer 6 cyl Four Wheel Drive Automatic 64444 miles

2002 Chevy Blazer LS will not fire. Engine Cranks, well, but will not fire. Was left to sit unstarted two foggy days, then temperature fell to 16 degrees. Now it cranks but will not start.

I used some fluid and, with some coaxing, it started. It ran a few minutes, then ran rough and died. Was not able to restart. When it died, though, there was a strong sulfurous odor and when I tried to start it again, there was a knocking sound wherein the starter stopped turning: Rr-Rr-Rr-clunk. Rr-Rr-Rr-clunk. Preignition?

I believe the starter may have become hot and began to drag. Anyway, I got it started and ran it at high and low RPM. The main concern now is that there doesn't seem to be enough air for the mixture, as it lags and idles poorly for a bit after giving it gas. I also had to leave the cover off the throttle housing so it wouldn't die. Perhaps it was badly flooded. Anyway, the "Service Engine light stays on and the oil pressure fluctuates with the idle speed. Perhaps this is caused by gas in the oil, but I am unsure.

Started right up this morning, drove it some, turned it off and restarted. It apparently runs well, but Service Engine light remains on.