'02 Ranger 4.0. Cat problems
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Post Fiend
Joined: Oct 2005
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From: Kiev, Ukraine
'02 Ranger 4.0. Cat problems
My cat.converter bites the dust. I have an idea to cut them away, but I see aditional oxy sensor under the bed. Will it work? I see two catalistic converters near engine. Seems to me they are cloged.
I wanna weld pipes in.
Any tips guys??
I wanna weld pipes in.
Any tips guys??
Former ******
Joined: Nov 2004
Posts: 4,901
Likes: 2
From: Salt Lake City, Utah
Usually plugged cats on Fords are in indication that the O2 sensors that regulate the fuel to air ratio have gone sour or that not all the fuel is being burned in the cylinders. How many miles on the sensors and on the spark plugs?
On an O2, you should have 2 pre cats up by the manifolds, and one or two larger cats after those. What leads you to believe they are clogged? I know a lot of people, even professional technician are quick to condemn the cats for any power loss, but plugged fuel filters and weak fuel pumps are more common.
What are you exact symptoms? Do you have any converter related codes stored? Do you have any other codes? Sometimes there can be codes or pending codes even if your CEL is not on. What is your Long Term Fuel Trim (each bank)?
On an O2, you should have 2 pre cats up by the manifolds, and one or two larger cats after those. What leads you to believe they are clogged? I know a lot of people, even professional technician are quick to condemn the cats for any power loss, but plugged fuel filters and weak fuel pumps are more common.
What are you exact symptoms? Do you have any converter related codes stored? Do you have any other codes? Sometimes there can be codes or pending codes even if your CEL is not on. What is your Long Term Fuel Trim (each bank)?
Former ******
Joined: Nov 2004
Posts: 4,901
Likes: 2
From: Salt Lake City, Utah
Usually plugged cats on Fords are in indication that the O2 sensors that regulate the fuel to air ratio have gone sour or that not all the fuel is being burned in the cylinders. How many miles on the sensors and on the spark plugs?
On an 'O2, you should have 2 pre cats up by the manifolds, and one or two larger cats after those. What leads you to believe they are clogged? I know a lot of people, even professional technician are quick to condemn the cats for any power loss, but plugged fuel filters and weak fuel pumps are more common.
What are you exact symptoms? Do you have any converter related codes stored? Do you have any other codes? Sometimes there can be codes or pending codes even if your CEL is not on. What is your Long Term Fuel Trim (each bank)?
On an 'O2, you should have 2 pre cats up by the manifolds, and one or two larger cats after those. What leads you to believe they are clogged? I know a lot of people, even professional technician are quick to condemn the cats for any power loss, but plugged fuel filters and weak fuel pumps are more common.
What are you exact symptoms? Do you have any converter related codes stored? Do you have any other codes? Sometimes there can be codes or pending codes even if your CEL is not on. What is your Long Term Fuel Trim (each bank)?
Thread Starter
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Post Fiend
Joined: Oct 2005
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From: Kiev, Ukraine
well, I have power loss, sored P0172/P0171 codes, I have new filter, fuel pump, pressure is OK! I tried to unscrew one o2 sensor and truck runs better, but I got lean mixture code ))
I hear noise inside pre cats, like someething fall indside. I suggest cells are destroyed, and I wanna cut pre cats. Will 2 other cats work? Will I get cat related code? I a reason to try?
P/S. I will not drive this truck over California! LOL! We have no E2 ore E3 emission requirements for trucks that have weight less then 3500 kg, so I can drive w/o cats... it is legal here.
I hear noise inside pre cats, like someething fall indside. I suggest cells are destroyed, and I wanna cut pre cats. Will 2 other cats work? Will I get cat related code? I a reason to try?
P/S. I will not drive this truck over California! LOL! We have no E2 ore E3 emission requirements for trucks that have weight less then 3500 kg, so I can drive w/o cats... it is legal here.
Post Fiend
Joined: Jan 2005
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They used to sell oxygen sensor eliminators for just what you are doing. They consisted of a bushing, with internal threads at one end to fit the oxygen sensor and the other end was welded on to the new exhaust pipe. The thing was that the bushing was long enough that the oxygen sensor did NOT sit out into the exhaust flow. This apparently stopped the computer throwing codes when the cats are removed.
Might be worth a try if you could fabricate something.
Might be worth a try if you could fabricate something.
Post Fiend
Joined: Jan 2005
Posts: 8,402
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If you do a search of ebay.com for oxygen sensor delete or oxygen sensor eliminator you may find a pic of one. It is just a short length of pipe that welds into the exhaust pipe and into which you can screw the oxygen sensor but long enough such that the sensor is not in the exhaust flow.
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Former ******
Joined: Nov 2004
Posts: 4,901
Likes: 2
From: Salt Lake City, Utah
The codes you have are for bad O2 sensors, not bad cats. Lean codes indicate a vacuum or intake leak, not bad cats. A lean mixture will cause power loss. The pre cats do most of the work, the other 2 cats are mostly just to finish up where the front cats left off.
Isn't the fuel in your area pretty low quality, or have they improved it?
Isn't the fuel in your area pretty low quality, or have they improved it?
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Thread Starter
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Post Fiend
Joined: Oct 2005
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From: Kiev, Ukraine
well, we have usually good fuel here, but one tank of bad gas somewhere in Russia is enought to kill cats, O2 sensors and spark plugs. My aero was the first victim. I had to amputate first "brick" of cat and she ran well, I passed emmision test (Euro-II). Some gas stations get bad low octane fuel and put some ferrozehn ore something like this to get oct.93 gas, but they can put this octane booster too much and get fuel that have more then 93 oct ratio. our engines are not aircraft engines designed for 103-108 oct. ratio like old An-2 planes and Ka26 helicopters with 9 cyl engines and air:fuel mixture continius burning in exaust pipes, cat.converters overheating and melting them, overheating ex. valves............ and we have failed cats....
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