Olcanharry
New Member
Hello all. So my 2000 lightning has been having some issues including a misfire. There is also a P0171(Left Bank Too Lean) code on the truck. The previous owner said he spent over 2 grand trying to fix the code including cleaning out fuel injectors and checking for vacuum leaks. There were no vacuum leaks and the fuel injectors were cleaned. The vehicle ran fine even with the check engine light on all summer. Now there are misfires every time I try to drive it. Interestingly, the vehicle would also misfire after every time it rained. Thinking about changing spark plugs, ignition coils and O2 Sensors. Also going to clean the MAF to see if it resolves the issues. Any other tips or suggestions would be appreciated. Thanks!
