Bank 1 and 2 Problems

[LMBACON55]

Having codes P0171, 0174. Check for leaks, cracked hoses only found one the PVC elbow. I can reset fault codes but they come back in a couple of days. Runs good except for these issues. I am still having a acceleration jerking between 3K and 4k, only does it when its warmed up. I've replaced the air filter, MAF sensor and fuel filter. Can use some advice.

 

[adsm08]

What's your fuel pressure?

 

[RonD]

Yes, test fuel pressure it possible

Lean codes mean the computer is having to add more fuel than it calculated based on engine size(3 liters), MAF data and 55psi fuel pressure
If fuel pressure is say 35psi then computers calculations will be off, but engine would run OK

 

[LMBACON55]

54psi

 

[decipha]

the most common cause for them codes coupled with the missing at higher loads is usually a failing fuel pump 100% of the time

remember you can only check fuel pressure drop at WOT

 

[LMBACON55]

Where is that at. The 54 I got was the rail pressure.