2002 4.2LNo power
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Joined: Nov 2003
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2002 4.2LNo power
This truck has no power and acts like it is out of time.It is a 2002 F-150 with 127,000 miles 4.2L.If you hold it in netural at about 3000rpm for a minute the exhaust is growing red.Here is what has been dune so far.New spark plugs,fuel filter,spark plug wires, coil pack.They have droped the exhaust to bypass the cats and it still run's the same.Fuel pressure is 34 at idle.This has been to two different shops and they can not find the problem.One shop (Ford Dealer)put a new lower intake on it also.It is so bad you can not drive it.
HELP!
Would the cam sensor do this?
Would the timing chain do this?
It had no codes until we dropped the exhaust because we unpluged the 2 O2 sensors that are in the cats.
HELP!The Ford Dealer gave up!This is a friend of mine's truck and it has been at the shop's for 2 months.The owner had to tow it because it will not hardly pull it self.
HELP!
Would the cam sensor do this?
Would the timing chain do this?
It had no codes until we dropped the exhaust because we unpluged the 2 O2 sensors that are in the cats.
HELP!The Ford Dealer gave up!This is a friend of mine's truck and it has been at the shop's for 2 months.The owner had to tow it because it will not hardly pull it self.
Hotshot
Joined: Aug 2002
Posts: 12,679
Likes: 15
From: BC, Canada
Have they checked the timing with a timing light?
It isn't adjustable but it can still be checked to see if it's close.
I think that's where I'd start.
A jumped timing chain should retard the timing a long ways and hopefully you'd see that with the light.
It isn't adjustable but it can still be checked to see if it's close.
I think that's where I'd start.
A jumped timing chain should retard the timing a long ways and hopefully you'd see that with the light.
