bushnut Posted May 4, 2017 Share Posted May 4, 2017 Earlier this spring I had issues with a p005 miss fire cylinder 5 code. turned out to be a bad injector. got one from a JY replaced it and all is good....Until a couple of days ago when I had trouble starting when the engine was warm. I've been watching fuel trim with my Ultra Gauge and I've noticed something strange. Long term Bank 1 and 2 seem to be in the -6 to -10 range but Short term Bank 1 and 2 are measuring +3 to -10 while I'm driving (engine under load) however when I'm idling at a stop light or in traffic Bank 1 Short Term will register -25 but Bank 2 is in much closer to 0. My guess is a leaking injector...or am i out to lunch could it be a faulty O2 sensor? no codes are showing. thanks guys Link to comment Share on other sites More sharing options...
fleurys Posted May 4, 2017 Share Posted May 4, 2017 I posted a video lately about this... definitely a bad pre-cat o2 sensor can wreck havoc in your fuel trims. Are you able to look at the o2 data ? 1 Link to comment Share on other sites More sharing options...
bushnut Posted May 5, 2017 Author Share Posted May 5, 2017 so it took a while to figure out but I was able to read all 4 O2 Sensors in real time. they are all over the map jumping from .oo7 to .100 and everything in between on both banks both pre and post cat. any ideas? Link to comment Share on other sites More sharing options...
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