pulled the valve cover and made sure the cam gears were tightened down and checked the dizzy for timing marks... it seems to be running fine now. Could it have just been some nasty gas or something, i run premium usually 91 sometimes 90 if the gas station is a cop out

The weather warmed up to about 20-25 degrees and now the car isn't starting again. Did the diag mode cel check and it flashed a 12 and a 13 so MAF and coolant temp sensor... replace or check and if check how do i go about that

I had the maf unplugged yesterday trying to troubleshoot why it wasn't starting