Car is a 2001 Volvo S40 T 1.9
Pulled the following...
PO172
PO301
302
303
304
139
102
172
Car is not starting was running a month ago, installed a new MAF sensor from Autozone...and now the fans are coming on which of course is indicative of a bad MAF. Prior mechanic replaced the spark plugs and knock sensor supposedly but just trying to figure out where to begin.

 

The MAF may be bad right out of the box. It's happened before. I'd take the new MAF back and get a warranty replacement. Then I'd clear the trouble codes and try again.

I'd also buy a can of spray MAF cleaner and clean the original MAF. Then plug it in to see if the car acts the same as before.

 

Got a new one on its way today...hopefully this will clear the codes if not got a set of ign coils, spark plugs, and spark plug wires all ready to go in...

 

Cleared codes
Swapped Maf
Replaced Coils and SPark Plugs

Car now will not run without keeping a steady foot on the accelerator...think FPR...but could it also be the IAC?
THanks again

 

Abnormally long cranking times usually mean a bad FPR. When mine went bad I first replaced the IAC because the car would start fast with my foot on the gas a tiny bit. But the problem continued and I discovered this forum which pointed me to the FPR which fixed it. I just left the new IAC in place since it costs so much.