Clean the MAF first with MAF cleaner as it could be dirty . The O2s may be contaminated or lazy . The O2s may be falsely reporting or switching too slow . Does it run better when you first crank it up in morning ?
SOURCE: runs rough when cruising at 35-40 mph
try pulling off the air breather hose and look inside at the mass air flow sensor,it looks like a wire with a diode hooked to it incase you didnt know,see if there is any fuzz on it,sometimes the air filter will lose small pieces and the mass air flow sensor catches it.If that doesnt work then you may have a fuel problem,weak pressure,causing the mass air flow sensor to read too much air so it tricks the computer to adjust the issue.
SOURCE: 2004 fx4 4x4 f 150 trans fault code hi temp
hi there. ...i can advise you that i have replaceed several transmission fluid temperature sensors (tft) for faulty readings.it is inside transmission and can be accessed by removing pan...hope this helps!...good luck
SOURCE: miss fire
Wow, you definitely covered the bases. The next step is to find out whats going on inside the engine. Try doing a compression test, that will tell you if you not only have good rings, but also what condition your valves are in. If the misfire is always in the same cylinder, I would check the cam on that side of the engine, its not outside the realm of possibility you have a worn cam lobe. Just out of curiosity, did the check engine light come on?
SOURCE: Repalced O2 sensors, mass air flow sensor, and plugs error messag
dpfe velve
small emissions valve with one electrical connnector and three to four vacume lines located near your egr valve. this is a comon fault on fords emmissions system.
SOURCE: 2001 Ford E150, V6. Stutter/hesitation upon
Have the throttle position sensor checked, might be faulty.
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