We have a blazer that has no power when you push on the gas. It won't go over 10 miles per hour.
changed plugs and fuel filter has no power
E-brake isn't on is it? If engine light is on I would somehow get it to an auto parts store and have then check codes, its free or I'd buy a cheap code checker of my own. Could be any number of things.
Mass air flow censer is probably the culprit !!!
then blazer is a misnomer