Hey guys this wouldn't be too urgent if the vehicle didn't need to be inspected or my wife wasn't using it for our kids, but it doesand she does. The vehicle is throwing two cel codes p1131 and p1132. Those codes indicted running rich and lean from the upstream ho2s. I was told this is not the o2 sensor as someone had same thing but replaced them to no fix.... Now I don't think its a vac leak cause the idle is solid. It runs fine I have cleaned the maf and replaced the bank one passenger injector o rings. What else can I do to fix this issue . Two injectors had some crude built on them on the outside but nothing on the squirters. What are my options I'm pulling my hair out here. The codes also relate to bank 1 only Thanks
Do a google search on those codes. and start narrowing down the reasons for them. It is usually easy to fix them once you realize what they are aiming at. 1131 is involved with a lot of PCV stuff, so it could be as easy as cleaning or replacing your PCV valve. The car will continue running, so don't freak out. Your wife can "forget" to get it inspected for a few weeks while driving the kids. Usually get just a warning. Meanwhile, work on possible sources, the obvious ones first.
i had a expedition with those codes. the valve cover breather hose that goes to the intake pipe was off. I believe the oil change guys had pulled it off when they did the oil change and didnt put it back on. this creates a path for unmetered air to enter the motor. look for vacuum leaks.
I have looked for vacuume leaks but, no luck and the idle doesnt surge at all. I did a google search and i got that it could be a number of things apparently is the a wide range of things. I hve been working to cross things off the list cheapest possible. Next is EGR valve to check for it being stuck open. After that exhaust leak maybe. I changed the o rings for injectors, i guess lst will be the o2 sensor... sigh, i hate new cars... the car runs great though, no problems... my damn comet has less problems..
Intake manifold runner control. (IMRC) If the plastic clips that hold the linkage to the runners are broken(fell off) Crappy designe. You will get lean/rich codes on the bank the IMRC is no longer connected to. May also want to check fuel pressure. If its weak it can starve one bank causing a lean code...This tells the PCM to force that bank rich to compensate by increasing pulse width on that banks injectors. Could need a simple reflash of the PCM as well (seen that alot!) Hope this helps you out!Good luck man!!!
Thanks ill take a look at the imrc, however, im pretty sure that will throw a code off too right (specific to the imrc)?
A 2000 Expedition doesn't use IMRC on either the 5.4l or 4.6l. LOok at the intake manifold and see if it is composite or aluminum. The composite manifold is prone to vacuum leaks when cold that won't typically cause running problems. If there is an oily buildup around the junction from manifold to cylinder head, there is probably a leak cold, usually only present when the outside temp is below 40°F. Also check and make sure your air filter fits the housing tight, no gaps. The 4 slots in the MAF housing side are sealed by the air filter and can also generate those codes. EGR will not usually generate fuel correction codes either without a corresponding code for DPFE on that system. That vehicle will run with a substantial vacuum leak and little or no drivability problems. If you can find a Ford dealer or someone that has reflash capabilities, reprogramming the PCM is also beneficial in certain cases.(some calibrations have lower limits for lean codes and the recal may correct it). The codes you gave indicate just the RH side of the engine also, so you might need to find someone to properly diagnose the problem if you can't find anything obvious. You might spend less than trying to throw parts at it. Plus, the only way to check an O2 sensor is to test it and measure the switch rate so don't assume yours is not bad based on someone else's problem. In this case, a scan tool that can monitor the outputs and fuel correction tables is your friend. I don't see that any of the above would leave her stranded so I wouldn't panic without other symptoms.
Okay yeah, im running so stumped on this thing... it's driving me nuts, I unfortunately dont have the crazy money dealers charger to tell you exactly the problem. So im simply trying to figure it out on my own, i may just replace the o2 sensor and give that a shot, or find an ohm meter to check the tolerances.
try F150online Forums - Message Boards for 1997-2005 F150, Lightning, Supercrew, King Ranch, Blackwood, Mark LT Light Duty Pickup T
