Execive black smoke, codes p0133 and p0171

1997 DODGE RAM
150,000 MILES
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ROLANDINI
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  • 2 POSTS
Execive black smoke, codes p0133 and p0171, new o2 sensors, upstream reading 0.000 and downstream 1040, wires are ok, new map sensor, tps, crank, idle air control, no vacuum leaks, fuel pressure ok, injectors ok. Any recommendation?
Feb 10, 2012 at 5:41 PM
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WRENCHTECH
  • ✓Experienced Mechanic
  • 20,760 POSTS
Where are you seeing those readings? From a scan tool or using a DVOM at the sensor?
Feb 10, 2012 at 6:03 PM
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ROLANDINI
  • MEMBER
  • 2 POSTS
I,m seeing this readings from a scanner.
Feb 11, 2012 at 8:22 AM
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WRENCHTECH
  • ✓Experienced Mechanic
  • 20,760 POSTS
It sounds like the fuel pressure regulator has failed, here is a link to check it out,

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
Feb 11, 2012 at 8:42 AM
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