5.3 PO171 engine code (lean) bank 1&2
Posted: Fri Aug 25, 2017 7:53 am
Does anyone here know how fuel injectors and the computer that controls them works?
Does the computer that controls the fuel injectors make its calculations based on full operating fuel pressure? Or does the computer make calculations based on the fuel pressure reading at a continuous point in time?
Can a weak fuel pump cause a lean error code? I'm assuming the answer is yes but don't know.
I am getting the lean engine code I think the number is 171, intermittently. Check engine light will come on for a few days then it will go off for a few days. I've got an inexpensive code reader and it's the same code every time.
When the engine code decides to come on, my engone idle becomes rough. It's never stalled out and never gets to the point where I think it's going to stall out, it just idles rough. I also get hesitation and sluggish acceleration. Highway operation seems normal. And fuel economy actually seems a little better lately.
Previously, I was getting misfire cylinder one and systematically changed everything on cylinder one.
I'm sure I could benefit by having the throttle body physically cleaned, but I don't know that a dirty throttlebody would cause intermittent rough idle?
I know it's not duckhunting related, but does anyone have any thoughts on this? I don't see any point in me joining a Chevrolet or GMC truck forum since someone here probably knows about this?
Thanks.
Does the computer that controls the fuel injectors make its calculations based on full operating fuel pressure? Or does the computer make calculations based on the fuel pressure reading at a continuous point in time?
Can a weak fuel pump cause a lean error code? I'm assuming the answer is yes but don't know.
I am getting the lean engine code I think the number is 171, intermittently. Check engine light will come on for a few days then it will go off for a few days. I've got an inexpensive code reader and it's the same code every time.
When the engine code decides to come on, my engone idle becomes rough. It's never stalled out and never gets to the point where I think it's going to stall out, it just idles rough. I also get hesitation and sluggish acceleration. Highway operation seems normal. And fuel economy actually seems a little better lately.
Previously, I was getting misfire cylinder one and systematically changed everything on cylinder one.
I'm sure I could benefit by having the throttle body physically cleaned, but I don't know that a dirty throttlebody would cause intermittent rough idle?
I know it's not duckhunting related, but does anyone have any thoughts on this? I don't see any point in me joining a Chevrolet or GMC truck forum since someone here probably knows about this?
Thanks.