Ford Escort ZX2 High Altitude misfiring
Ok, slide along a patch of ice and smacked my front end into the rear driver tire of a honda CRV. Now I've got some rough idling, which was happening before the collision, also have a starter that doesn't start half the time. I notice in the city the engine idles rough, and has power. When I go back up to the mountain towns at 9,400 ft above seal level, I obviously lose power. The idling doesn't get worse at altitude, but it does 'hunt' while under power very often. I've not replace my 02 sensor since I moved up 4 months ago. The car had been in FL for it's life, so it's used to sea level 02 I suppose. I went to AutoZone and they gave me a single code P1131. Says possible causes could be: Misfire on Bank 1, Vaccum leak affecting bank 1 only, Fuel injector problem bank 1, or Engine mechanical condition. The code also states it 'detected bank 1 02 at its lean limit' I assume bank 1 plug 2? I can do basic maintenance and fluid changes, but this is beyond me. Any feedback is much appreciated. Thank you in advance!