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p0171

  1. Engine stall and die

    Hello, My 2016 mustang ecoboost is stalling while in drive gear or reverse with break, it will stop stalling on neutral, also when it is close to stop (let us say while slowing down before stop). It stall and it will die (shut off), i had to turn it on again. I have the following codes on the...

  2. Car throwing p0171 after intercooler and downpour install

    I’m having an issue with my 2018 ecoboost right now. I just recently installed a cp-e intercooler and a rev9 off road 3 inch down pipe along with new plugs from tune+ I have a new tune from unleashed but the car seems really down on power and started throwing a p0171 code. I’ve gone over...

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