code po351-354 mis fire help?
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code po351-354 mis fire help?
well this all started with my wifes escape started running rough in the rain one day.She said it was a little shuttering for about a minute then went well agin.
couple weeks later happened agin, in the rain?? then last week it was ever worse then the light on the dash came on... sh$%. when she was driving home the other night it was hissing from underneith and could bearly move wicked misfire... get home code reader says p351-p354 and a code316 to boot.so i changed all the plugs all the cop and now am replacing the pipe that must conect the front cat converter and the 2nd or fire wall side cat and then to the 3rd cat..right??.when the car was running exahst was comming from the steel braided peice of pipe that conects all the cats . any help would be great.will i get this dam thing fixed??
couple weeks later happened agin, in the rain?? then last week it was ever worse then the light on the dash came on... sh$%. when she was driving home the other night it was hissing from underneith and could bearly move wicked misfire... get home code reader says p351-p354 and a code316 to boot.so i changed all the plugs all the cop and now am replacing the pipe that must conect the front cat converter and the 2nd or fire wall side cat and then to the 3rd cat..right??.when the car was running exahst was comming from the steel braided peice of pipe that conects all the cats . any help would be great.will i get this dam thing fixed??
Cargo Master
Joined: Dec 2006
Posts: 2,511
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From: hinckley ohio
if it was the cats it would run poor all the time I would think.Also when the cats plug they get super hot.Did you replace the lower intake gaskets?Another question for you to check into is maybe your cats are still under warranty from Ford.
Elder User
Joined: Nov 2003
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You have one or more coil packs that have gone bad. Find out which cylinder or cylinders are misfiring and change out the coil packs.
If you keep running the vehicle with these bad packs, you will ultimately ruin your catalytic converter because of all the unburned fuel getting into it.
The running rough in the rain is a dead give away that one or more of your coil packs have gone bad. Or one of your ignition wires is shorting out. This only happens in damp, rainy, humid weather.
Been there, so I know what I am talking about. Luckily I had the packs changed out before permanent damage was done to the cats..
If you keep running the vehicle with these bad packs, you will ultimately ruin your catalytic converter because of all the unburned fuel getting into it.
The running rough in the rain is a dead give away that one or more of your coil packs have gone bad. Or one of your ignition wires is shorting out. This only happens in damp, rainy, humid weather.
Been there, so I know what I am talking about. Luckily I had the packs changed out before permanent damage was done to the cats..
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danger-ranger93
1987 - 1996 F150 & Larger F-Series Trucks
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Oct 7, 2010 06:02 PM
