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1997 - 2003 Ford F150 General discussion on the Ford 1997 - 2003 F150 truck.

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Old Jun 4, 2025 | 02:00 PM
  #11  
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funny how both converter are bad at the same time.
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Old Jun 5, 2025 | 02:19 PM
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A little coincidental but not bad for 220,000 miles.

Vehicle is tuned to run w/converter restriction. So the AF's will be off if deleted (air/fuel ratio). Parameter margins aren't wide enough to auto correct w/that kind of change in flow unfortunately.

As already mentioned, I'd leave it alone. Unless you need to replace the system for other reasons anyway.

Nice user name btw..why didn't I think of that ???
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Old Jun 5, 2025 | 05:47 PM
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Originally Posted by Jbrew
A little coincidental but not bad for 220,000 miles.

Vehicle is tuned to run w/converter restriction. So the AF's will be off if deleted (air/fuel ratio). Parameter margins aren't wide enough to auto correct w/that kind of change in flow unfortunately.

As already mentioned, I'd leave it alone. Unless you need to replace the system for other reasons anyway.

Nice user name btw..why didn't I think of that ???
Thanks. I signed in with Facebook, it gave me that user name. lol
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Old Jul 6, 2025 | 03:15 AM
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I don't think rust and collisions combined have done as much damage to cars as that Kilmer imbecile has with his nonsense rants and advice.

If the catalyst is not physically damaged and is just coated with spot you can clean it off the vehicle by submerging it in acetone or MEK and agitating it to dissolve and dislodge the soot. You'll also need to address the source of the soot or it will just happen again. Cats don't die of old age, they get murdered.
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Old Jul 6, 2025 | 12:27 PM
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Originally Posted by kurek
I don't think rust and collisions combined have done as much damage to cars as that Kilmer imbecile has with his nonsense rants and advice.

If the catalyst is not physically damaged and is just coated with spot you can clean it off the vehicle by submerging it in acetone or MEK and agitating it to dissolve and dislodge the soot. You'll also need to address the source of the soot or it will just happen again. Cats don't die of old age, they get murdered.
Thanks for the reply. I check the temp. before and after the cats. It runs about 100 degrees hotter at the front of the cats. From what I've read it should be hotter towards the back of the cats. ???
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