Truck runs good at idle . o2 is in control at idle when rpms are raised [...] engine will drop in idle 02 goes lean injectors MS do not change from 4.6 ms 02 drops to .07mv. this only happens off idle.i duel traced both o2 and inj unpluged map hose o2 and injs...

Summary posted 9/23/2003

iATN Members:
Login to view full TechHelp request
Auto Repair Pros:
Join iATN to read this TechHelp request
Vehicle Owners:
Find a nearby iATN member to repair your vehicle