T
theresa t
Guest
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I got a 2003 f-150 with the 4.2 engine in it. I have 109k miles on it. My problem is that the idle upon stopping will be stabilized perfectly at 650 rpms and after a second or two will idle down to around 500, rise up to around 950, then stabilize again for about 5 seconds. After that, the problem repeats itself until I start driving again. I also have codes saying that bank 1 and bank 2 are lean; however I never have any other problems besides idling. One other rare case is the idle problem will only happen after I've driven the truck constantly for over an hour. I checked some other answers and there seems to be no vacuum leaks that I can plainly see and the pvc angles are not cracked. I cleaned the mass air flow, changed plugs, and cleaned the air sensor above and past the throttle body.
I got a 2003 f-150 with the 4.2 engine in it. I have 109k miles on it. My problem is that the idle upon stopping will be stabilized perfectly at 650 rpms and after a second or two will idle down to around 500, rise up to around 950, then stabilize again for about 5 seconds. After that, the problem repeats itself until I start driving again. I also have codes saying that bank 1 and bank 2 are lean; however I never have any other problems besides idling. One other rare case is the idle problem will only happen after I've driven the truck constantly for over an hour. I checked some other answers and there seems to be no vacuum leaks that I can plainly see and the pvc angles are not cracked. I cleaned the mass air flow, changed plugs, and cleaned the air sensor above and past the throttle body.