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2006 ford f150 5.4 liter 3 valve. Brand new spark plugs, coil packs, oil change, and manifold gaskets. Codes for bank lean 1 and 2, and bad ecm. It smells like gas in the cab of the truck. If I turn on the heat with air circulation the smell goes away. So that tells me it's coming from the engine. I can't find any leaks and I did the spray test. I cleaned the maf sensor( i did the test, had truck running and unplugged maf sensor and truck stayed on) and throttle body and put in 2 different fuel cleaners at different times to see if that helped. It has trouble going uphill(foot to floor and drops down to 20mph on steep hills, rpms don't rise, seems to hesitate and shake more on hills), purge valve lines and evap lines are brittle and leave black residue on fingers, struggles switching to the next gear at 45mph( feels like death wobble), brake light flickers on and off, and struggles getting back up to speed after stopped. It has a rough idle but not too bad and runs fine through town.
How long has your 2006 Ford F-150 had this problem?
More than a year
1 Reply
Hi - Dave here, contributing to RepairPal and providing expert advice since 2010. Unfortunately, it sounds like you have more than one problem. With both banks lean, I suspect an intake manifold leak, or some other vacuum leak a the hose under the hood. With a lack of power - if the lean codes are resolved, you will want to ensure correct exhaust fflow. If fuel is running through the exhaust, you may have caused damage to the catalytic converters - which can restrict exhaust flow and in turn cause engine perforomace issues. Some hands on professional evaluation is needed - especially by a Ford expeienced technician. https://repairpal.com/auto-repair-near-me Click the link to find some shops near you who can help out!