I'm getting a fuel system lean trouble code on bank 1. Is this something that needs to be changed in the tune, fuel pressure, or on because of only having front o2's?
Engine is a 2003 5.3 and pcm was tuned by nelson.
Travis
I'm getting a fuel system lean trouble code on bank 1. Is this something that needs to be changed in the tune, fuel pressure, or on because of only having front o2's?
Engine is a 2003 5.3 and pcm was tuned by nelson.
Travis
1996 GMC extended cab, 2003 5.3/auto
Check for vac leaks, the right way with a smoke machine, that is only way to tell.
Be sure the o2's are toggling up and down, 20mv to 900mv.
Be sure fuel pressure is at least 50psi at idle.
Nelson Performance
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You may have a bad O2 sensor. I had the same codes, replaced the O2 sensor and it started reading again... don't get me started on O2 sensors
30' Ford Model A Tudor Sedan - Custom chassis - Big bore LS2 - twin B76's - Glide - 9" w/ 3.07 gears - 30" DR tire - 2k lbs cruiser
ok thanks I'll check these out tomorrow
1996 GMC extended cab, 2003 5.3/auto
Can use foaming glass cleaner that contains alcohol or carb cleaner spray to check for vacuum leaks also but don't set it on fire.
The codes went away so unsure of what really is the problem. I'll keep a close eye to see if it does come up again.
1996 GMC extended cab, 2003 5.3/auto
if you were running open headers it will throw that code also.
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