Codes! Car running rough. P1171, P0171, P0136
 

Hello Everyone! Hoping to get some assistance with a problem that has my 1999 S70 non-turbo stranded:

Symptoms:

1. Running rough in general.
2. Bad idle
3. Black smoke out of exhaust (rich)
4. Large hesitation to accelerate

Codes:

• p0136
• p0171
• p1171

What I've tried:

• Replacing MAF
• Assuring MAF connectors are clean.

Any ideas?
Thanks!