After about thirty minutes of idling or driving starts misfiring, stalls, sometimes it does not want to start but does (acts like battery is dead but not). Other times it tries to turn over. I replaced the ignition control module, coils, plugs and wires, due to a multiple misfire code p0131, I believe. That seemed to work light gone. Drove fine for two weeks, now all this again. This time I was letting the car warm up and ten minutes later it was stalled when I went to get in it. The code reads p0171 lean bank 1. I drove it fine yesterday today I let it idle for twenty minutes the put it in drive and misfiring started, engine light flashing. I restarted it drove fine two mile to buddy's garage to read codes. P0171, I am lost I do not know where I should start. Any suggestions please? I am thinking clean MAF, but from there I do not know. I am assuming I need my fuel pressure read, and vacuum pressure read. I am just wondering if it was that bad why twenty minutes it is fine.
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Saturday, December 9th, 2017 AT 3:55 PM