The codes are P0171 and P0174 System too lean bank 1 and system too lean bank 2. I connected a fuel pressure gauge to the manifold and am reading 30psi at Idle. From what I've read it should be between 28 and 45psi, could this be a bad regulator? The engine runs fine, no rough idle or hesitation at all.

 

Im getting codes P0171 and P0174 System too lean bank 1 and bank 2. I connected a fuel pressure gauge to the manifold and am getting 30 psi at idle, from what I've read it should be 28-45 psi. The engine runs fne, no rough idle or hesitaton at all, could my regulator be going bad, it hold pressure when engine is shuts off.

 

Why are you tacking this onto a thread in the pre-1997 forum when you have a 2000?

You probably have a rotten or cracked PCV elbow behind the intake manifold.