93 running lean
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Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
OK, so the above codes say that Both cyl banks are cycling rich/lean, so you don't have fuel trim control on either cyl bank for some reason.
Since you've done a lot of under hood work lately, Double check All vacuum line connections, including the PCV valve & its plumbing, for disconnected, dryrotted/cracked lines, or loose fittings. Check the upper & lower intake manifold fasteners for proper torque & maybe perform a vacuum leak test with propane sniffer, around the new gaskets, in case one wiggled out of place.
If all that looks ok, set your scan tool up to monitor PID's from fuel control things like the MAF, O2, ECT, TPS, to see if they are reporting in range. Use your multimeter to make sure the fuel injectors have full B+ voltage to them.
Did you find out what drained the battery & is it now fully charged & is the alternator keeping it fully charged?
Since you've done a lot of under hood work lately, Double check All vacuum line connections, including the PCV valve & its plumbing, for disconnected, dryrotted/cracked lines, or loose fittings. Check the upper & lower intake manifold fasteners for proper torque & maybe perform a vacuum leak test with propane sniffer, around the new gaskets, in case one wiggled out of place.
If all that looks ok, set your scan tool up to monitor PID's from fuel control things like the MAF, O2, ECT, TPS, to see if they are reporting in range. Use your multimeter to make sure the fuel injectors have full B+ voltage to them.
Did you find out what drained the battery & is it now fully charged & is the alternator keeping it fully charged?
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Mountain Pass
Joined: Mar 2012
Posts: 210
Likes: 19
From: Southeast MI.
no idea how it happened. when i had the new exhaust front pipe installed i gave him 2 new sensors so he would not have to mess around with pulling out the old ones. I would blame it on him, but the truck ran bad before it went in. the connectors in the wiring harness were not mounted on the brackets like they probably should have been. they were just hanging down at the back of the engine. you can take the harness and flip flop the end of it. there is plenty of slack to plug them in backwards. my cousin came over and we messed around trying to figure this out. he is a painter at a Ford collision shop so there are mechanics there. he was telling one of them about how when i pulled the plugs they looked the opposite of what the computer was saying. i had bank 2 lean, and the plugs showed rich, bank 1 rich and the plugs looked lean. and one of the mechanics said maybe the sensors are backwards and laughed about it. so we got a wiring diagram and followed the wire colors and holy crap! sensor 2 was hooked up to bank 1. the truck is running great!
Big thanks to everyone that helped to work this thing out.
Big thanks to everyone that helped to work this thing out.
Moderator
Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
Good feedback & trouble shooting idea to check the O2 sensors wiring color code. Murphys Law strikes again. If an automotive part can be installed incorrectly, someone will install it that way!!!! When trouble shooting, take nothing for granted, put everything on the suspect list & make it prove itself. Good to hear all seems well after getting the reversed connected O2 sensor wiring harness hooked up right & its running ok now. We danced all around that with the plug read & trouble codes & the plug read visuals looking to be reversed, because it never occurred to me that the O2 sensor wiring harness was long enough to be able to have its connections reversed.
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