Happster
Member
- Joined
- January 19, 2009
- Messages
- 39
- Reaction score
- 3
- City, State
- Dunstable, MA
- Year, Model & Trim Level
- 2017 Explorer XLT 3.5L V6
So I was getting misfires in cylinders 5 and 6 so put in new plugs and fuel injectors. Fixed the misfire but now I'm getting a rich code in both banks, with fuel trims to match. Short term fuel trims at idle are at about -12% bank 1, -7% bank 2 with some fluctuation, long term fuel trims in both banks are steady at -25%. All go down as I throttle up the engine. Verified no air blockage so it has to be fuel. I cheaped out on the first set of injectors, which also appeared identical to the factory ones EXCEPT the engine side o-rings were to small, so I reused my old ones. They were in good shape and don't leak. So I bought a new set of injectors purporting to be a direct replacement for my exact part number and everything is the same. Once again, the o-rings were to small. I'll check fuel pressures, but am otherwise at a loss. I suppose I should just bite the bullet and get OEM injectors, but any thoughts appreciated on what else I can do to troubleshoot.
