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P0171. Running lean in bank 1. Haven’t been able to figure it out. Two smoke tests have uncovered zero leaks. From the threads I’ve read, could be any number of things. Just depends on how far down the wormhole I’m willing to go with throwing new parts at it. Engine runs great, fires right up and idles perfectly. But what damage am I doing by not addressing it. With the low mileage it has sat for long periods. What has worn out during that time? Hoses, gaskets, valves, fittings. But which one, or combinations of those, are causing the problem? So frustrating. I’m thinking of starting with the MAF sensor and going from there.So…. What’s the cel code reading?
Thank you for the link and the suggestions on the CEL. Hoping to start troubleshooting in a few weeks with fingers crossed.Are you in Milwaukee, as in Milwaukee WI? You gotta stop by in our local club and say hi: WI- Land Cruiser Legends - https://forum.ih8mud.com/forums/wi-land-cruiser-legends.23/page-13
As for P0171 - I bet it is sucking air on the intake side somewhere. You can try replacing the pre-Cat O2 sensors but I doubt they are bad. When mine had this issue (albeit at 250k miles ) I replaced the spark plugs, MAF sensor, coils, valve cover gaskets, fuel filter, all vacuum lines, fuel injector o rings and seals, gas cap and PCV valve and hoses. Didn't make a difference until I replaced the intake gaskets.
I was actually kidding. It blows me away when I see trucks this old with such low mileage. I bought my '06 4 years ago with 59K on it and now have 125K. Enjoy your "new" rig!Been daily driving it since I got it, have about 67,000 miles to date. The CEL issue has been resolved and I haven’t had a single issue since it was diagnosed and fixed. Now having my catalytic converters sawed off in front of my house, that’s another story. I’ve been lowering the suspension every night to at least make it a little more difficult.