Hi, I have 2001 LS 3.9, it started misfiring after driving for a bit, I replaced coil pack on cyl 1, the light still comes on after driving for about 10 15 min. The car shakes anl loses power. I then replaced 1 trough 4 cylinder coil packs and still same problem with shaking and same 2 codes. I don't think it's coil packs anymore because I've tried 3 different ones and also why there would be lean code on just bank #1? Could it be #1 injector? Thank you.
Codes P0301 and P0171
- Thread starter devilsy2k
- Start date
04_Sport_LS
Dedicated LVC Member
If the engine is making no unusual mechanical noises,,, and you have already replaced the coil on that cylinder,,, then yes... the injector would be the next most likely problem.
At this point you could unplug the injector,,, and see if it runs any different. If not,,, then you found your problem... either with the injector,,, or the wiring to the injector. If unpluging the injector makes a slight worse change in idle,,, then the problem may be mechanical within the engine.
At that point,,, a compression test may be necessairy
At this point you could unplug the injector,,, and see if it runs any different. If not,,, then you found your problem... either with the injector,,, or the wiring to the injector. If unpluging the injector makes a slight worse change in idle,,, then the problem may be mechanical within the engine.
At that point,,, a compression test may be necessairy
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