Driving down the turnpike today I noticed the blazer having problems keeping speed (80 mph) then I tried to pass a car and had no power. The loss of power and speed has resulted in sitting on the side of the highway for an hour now... Any ideas?

 

Im getting codes p0101 and p0452 now... i cleared, cleaned maf and drove again, still no power and now only getting code p0101

 

P0101 - Mass Air Flow System Performance
P0452 - Evaporative Emission Control System Pressure Sensor Low Input

 

cleaned then replaced maf... no change, could it be the cat?

 

What ended up being the resolution to your issue?

 

i had a similar issue, the cat blew and the inside of it basically blocked the exhaust flow.
i dont remember if i got any codes.
new cat and problem fixed.