Driving the rig around the neighborhood and it died. Started back up fine but it seems like it is in limp mode on 4 cylinders. Pulled a code "Intake manifold runner control stuck open, Bank 1" What the heck does that mean? Any ideas, any thoughts appreciated
I didnt no gm was using intake manifold runner valves but the fords have been using them for a while. its basically a little butterfly valve thats in each intake runner it controlls air flow usually only on warm up. on the fords the code is usually caused by a broken clip that holds the IMRC rod to the IMRC motor. so the motor trys to either close or open the valves but cant because the rod falls out.
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