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International Automotive Technicians Network
Re: 2014 Equinox- Fuel composition
Posted to Technical Discussion Forum on 1/6/2024

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I would look at :

1. Looking at the PCM PID for engine loop, from a cold start show open loop and once coolant goes above 140 F deg does PCM go into closed loop ?

If not, then PCM ignores feedback... Login to read more.