SOURCE: what is lambda control at lean limit for proton gen2
Air/fuel mix is too lean and beyond computer limits of adjustment. Check for vacuum leaks , restricted fuel filter or low fuel pressure.
1ST 11LB/FT
2ND 22LB/FT
3RD 33LB/FT
4TH 44LB/FT (FINISHED) THIS IS THE TORQUE PROCEDURE FOR HEAD BOLTS
run the fault codes
best place to start to determine a problem
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