wjfawb0
Member
- Joined
- January 18, 2008
- Messages
- 39
- Reaction score
- 1
- City, State
- Chattanooga, TN
- Year, Model & Trim Level
- 2010 F150 XLT Scab 4x4
2013 Explorer Limited 3.5L V6 ~60,000 miles
I changed the oil, oil filter, and air filter on my wife's 2013 explorer a couple days ago. Immediately after the service the car idled fine for 10+ minutes in the driveway before I shut it down (finally found the oil life reset in the menu again). Just an hour or so later my wife took off in the car, and a couple miles down the road it lost power, idled down, and she was barely able to pull into a driveway before it died. I headed over there figuring it was a vacuum leak where I had disconnected the hose to remove the top half of the filter housing. I tried starting the car and it rough idled and died. I reseated the filter and reconnected the intake hose again, not finding any obvious problems, and the car then started and ran fine.
So, 40 miles that night and 80 miles the next day the car ran fine. When she left church last night the car was idling rough and pinging anytime it got into moderate load. She drove backroads all the way home, coasting and keeping the load light to avoid the pinging. When she got home it had the two codes P0171 and P0174 (lean bank 1 and lean bank 2).
I took the intake completely apart looking to see if the PCV hose or other vacuum hoses might have come unseated or cracked when I lifted the intake hose up to separate the filter/MAF housing. I could find no damage or problems visually. I disconnected the battery, cleaned the intake tube of some oil residue from the PCV inlet and used some carb cleaner on the throttle blade because of what I've read here on throttle bodies.
After reconnecting everything I started the car and drove it up and down a 55mph highway. It was rough idling and would constantly ping (lean detonation) at moderate loads or higher. I ran the TORC app, but I don't have any idea what the Mass Air Flow sensor should be reading versus volumetric load and throttle position. It appeared that the MAF was reading low numbers to me, but it was varying with throttle and load. In short, it sounds like I do in fact have an air leak somewhere past the MAF.
Can anyone look at my TORC screen shot and tell me if the 36.9 MAF reading is typical for a steep hill at 20mph and 35% throttle at 90% load? It pinged like crazy when I was at 70 load, 36 throttle, and close to 40 MAF reading.
I changed the oil, oil filter, and air filter on my wife's 2013 explorer a couple days ago. Immediately after the service the car idled fine for 10+ minutes in the driveway before I shut it down (finally found the oil life reset in the menu again). Just an hour or so later my wife took off in the car, and a couple miles down the road it lost power, idled down, and she was barely able to pull into a driveway before it died. I headed over there figuring it was a vacuum leak where I had disconnected the hose to remove the top half of the filter housing. I tried starting the car and it rough idled and died. I reseated the filter and reconnected the intake hose again, not finding any obvious problems, and the car then started and ran fine.
So, 40 miles that night and 80 miles the next day the car ran fine. When she left church last night the car was idling rough and pinging anytime it got into moderate load. She drove backroads all the way home, coasting and keeping the load light to avoid the pinging. When she got home it had the two codes P0171 and P0174 (lean bank 1 and lean bank 2).
I took the intake completely apart looking to see if the PCV hose or other vacuum hoses might have come unseated or cracked when I lifted the intake hose up to separate the filter/MAF housing. I could find no damage or problems visually. I disconnected the battery, cleaned the intake tube of some oil residue from the PCV inlet and used some carb cleaner on the throttle blade because of what I've read here on throttle bodies.
After reconnecting everything I started the car and drove it up and down a 55mph highway. It was rough idling and would constantly ping (lean detonation) at moderate loads or higher. I ran the TORC app, but I don't have any idea what the Mass Air Flow sensor should be reading versus volumetric load and throttle position. It appeared that the MAF was reading low numbers to me, but it was varying with throttle and load. In short, it sounds like I do in fact have an air leak somewhere past the MAF.
Can anyone look at my TORC screen shot and tell me if the 36.9 MAF reading is typical for a steep hill at 20mph and 35% throttle at 90% load? It pinged like crazy when I was at 70 load, 36 throttle, and close to 40 MAF reading.