Cat removal
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Junior User
Joined: Oct 2013
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Cat removal
Once I removed the cat on my 460 89 ford f250 it runs but bogs down once I push the gas pedal. I need to gut the cat and drive it to a shop to have the cat welded back on. Is there something I need to do to make it run fairly smooth so I can get it to the shop? The two pipes on top of the cat that I cut out, do they need to be capped with something for it to run smoothly enough for me to get there?
Postmaster
Joined: Nov 2011
Posts: 3,533
Likes: 17
From: SW Florida
Yup, with no cat it should run better if anything, never worse.
Did you damage the oxygen sensor while you were under there? I don't remember where it is on that truck but the sensor needs to stay in place... everything downstream of that you can do what you want with.
Did you damage the oxygen sensor while you were under there? I don't remember where it is on that truck but the sensor needs to stay in place... everything downstream of that you can do what you want with.
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Junior User
Joined: Oct 2013
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It was running just fine prior to taking the cat off and it still runs fine but pushing on the gas pedal bogs it down. It might be because I don't have much gas in it. I did notice that it idles fine but will bog down once I push the gas. I thought the two tubes had to be plugged or something had to be done with them but I could be mistaken.
Cargo Master
Joined: Nov 2013
Posts: 2,168
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From: South Central,MO
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Postmaster
Joined: Nov 2011
Posts: 3,533
Likes: 17
From: SW Florida
Haha LMAO this cracks me up right now... I'm sure the beer helps too. I went to look at a CCLB F-250 once, the gal selling it (per her boyfriend's request, said it was his project) had NO gas in it according to the gauge, but she claimed it would be fine and the gauge was off. So I took it for a test drive and made it maybe 3/4 of a mile before the 460 sucked the tanks dry... I told her no thanks. If she can't be bothered to keep it ready for a potential buyer to drive, no telling what else was neglected while they owned it.
Anyway, not to hijack this thread, get some go juice in there and try again. Should run better without the cat. If you mean plugging the air injection tubes, don't bother. Just ditch the smog pump and plumbing altogether.
Anyway, not to hijack this thread, get some go juice in there and try again. Should run better without the cat. If you mean plugging the air injection tubes, don't bother. Just ditch the smog pump and plumbing altogether.
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Junior User
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The beer didnt help at all and I'm more then positive that the gas that I put in there wasn't sufficient. I was more worried that the smog tubes might be causing the trouble and wanted to make sure they werent the problem. Thanks to all and will update tomorrow.
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Junior User
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I should be able to hear the fuel pump run in the rear tank if I have someone turning the key for me. I don't. I believe that the rear fuel pump isn't going because it's not running at all anymore with gas in it and there is no fuel pressure at the rail. It's like I hit the fuel shutoff. I have ordered a new front tank and will update when it comes in. Thank you all for the help.
Posting Guru
Joined: Sep 2008
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I'll be hollowing out my front cat and replacing the 50-state legal rear cat with a 49 state legal on. I thought I'd gain some but will it be that significant?
