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Discussion Starter · #1 · (Edited)
I may be imagining it out of fear. The CEL light came on once then disappeared then re-appeared and has stayed on. Any advice where to start? It it a major problem...I plan on driving a 3hr trip soon.:unsure:


P1131

Lack of bank 1 O2 transitions - lean limit

ECM detected bank 1 O2 at its lean limit

Misfire on bank 1
Vacuum leak affecting bank 1 only
Fuel Injector problem bank 1
Engine mechanical condition
 

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Sounds to me like maybe the fuel pressure regulator is shot or something with it is messed up. On vulcan engines (not DOHC), the fuel pressure regulator is on the front fuel rail, I am not sure if this is bank 1 or not, but connected to the regulator is a vaccum line. I am not 100% on this, but I would look at that first...
 
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