So I have a ford e150 econoline with 4.9l straight 6 efi engine.
The problems. Starts ok first in the morning but shaking and spluttering under acceleration.
After 15-20 cats out and don't start till its hot.
I replaced the spark plusgs, ht leads, distributor cap, but still the same.
Plugged the snapon mt2500 on and the following codes came up:
P0171 system too lean bank 1
P0174 system too lean bank 2
P1131 Ho2s11 sensor indicate lean
P1151 Ho2s21 sensor indicate lean
P1137 Ho2s12 sensor indicate lean
Any idea or suggest where to start.
Checked vacum lines and Egr valve they looks good.
Any help will be good