4.6L Could be ugly!
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Freshman User
Joined: Aug 2002
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From: Lincoln us
4.6L Could be ugly!
Ok, I have a 2002 Supercrew with a 4.6L 138,000 miles- Driving home to day with the AC on I went to pass a car, put the hammer down, and instantly I knew something was wrong. As I was passing the truck kicked down, rpms went up like normal but then I lost power. I kept losing power until I actually had to pull over. The truck wanted to idle at 4-500 rpms and barely kept running. I only had a couple miles to my house so I limped her home. The only way I could get any RPMs out of it is by pumping the pedal then it would gain some RPMs to get some speed then I would coast again until I could get it to kick back in. Once I got home I let the truck idle and it died. It still starts but it runs (barely) then dies. Im a little confused, and nervous. I have had 4 coils already replaced but this seems different than those times. The check engine light never came on- Anyone have any ideas? I wish it was a fuel filter, but I doubt it, just hope it isnt in the timing. Any help would be REALLY appreciated, Im suppose to be leaving Tuesday to go Antelope hunting and I need by truck!
Thanks!
Thanks!
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Freshman User
Joined: Aug 2002
Posts: 27
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From: Lincoln us
I would have to check my records but I think it was right around 100K- the only thing I am confused about is why would it lose the power exactly when I was passing?
Last edited by bvwarrior; Sep 3, 2005 at 10:22 PM.
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Freshman User
Joined: Aug 2002
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From: Lincoln us
Well this gets interesting, so I checked fuel pressure, 40 lbs on the nose, so then I sprayed some carb cleaner in the intake to see if it helped, nothing. Then I started to think well maybe its the converters and they are plugged, so I took each of the O2 sensors off to see if that helped, again nothing. So I pretty much got mad and took the intake hose off where it reached the air filter started the truck, again nothing, after I shut it off I happened to look inside the hose and seen a little piece of leaf ( 1/4 inch by 1/4 inch) on the sensor. I plucked it out with tweezers, and then figured I would start the truck just to see, and sure enough, running like a champ. I was and still am absolutely stunned (yet happy). The leaf must have caused the sensor to act up but wasnt enough to completely shut the truck down. Strangest damn thing I have ever seen. 4 hours of searching eliminated in 2 seconds, unbelievable, but hey thanks guys for all the help, I really appreciate it!
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Post Fiend
Joined: Feb 2004
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From: nebraska
Thats great. Maybe you should be a mechanic. Look how much money you saved. Are you from Lincoln,Ne. Just curious.
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Originally Posted by bvwarrior
Strangest damn thing I have ever seen. 4 hours of searching eliminated in 2 seconds, unbelievable, but hey thanks guys for all the help, I really appreciate it!
There are two wires in there, the computer passes voltage through them, they heat up, and the computer can tell how much air is passing through by how much they cool down by the air passing over them.
The leaf stood in the way of the air flow, so the computer didn't think it was getting any air, running way lean.
Glad you found it
art k.