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International Automotive Technicians Network
Re: Cobalt SS Stalling/surging with MAF plugged in
Posted to Technical Discussion Forum on 11/21/2014

You are chasing a phantom with a MAF disconnected, without the MAF, GMs trims off the map sensor. Post up scan tool shots of maf,o2s load loop status, tps, [...] temp sensor.

My bet is the cts is reading -40 the default value Login to read more.