Blocked Cat Converter
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New User
Joined: Jul 2011
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Blocked Cat Converter
Hey guys I have a 2006 F-150 with the 5.4L. I got the check engine light and the computer says catalyst defeincy bank 2. So I assume the passenger side converter is blocked. Is there anyway to either take out the cat and replace with a peice of straight pipe and bypass the o2 sensors or take the cat out of the housing and put the housing in and then bypass the o2 sensors. Help. Thanks
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Joined: Aug 2008
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From: Vicksburg, MS
I'm sure Bank 2 is the driver's side 5-8. You will need to replace the cat(s) to correct the code. They usually go bad for a reason also. Bad injector, misfiring plug, etc. You can remove them to inspect them if your inclined to. They were on backorder but there are more sources now.
Senior User
Joined: Aug 2008
Posts: 298
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From: Vicksburg, MS
Summit Racing prices are: Driver side 2wd run from a #53651 Walker @ $251.99 to a #93664 Magnaflow @ $341.14; Passenger side 2wd from #50543 Walker @ $389.99 to a #47167 Magnaflow @571.95. 4wd are usually a little higher. This converters are 49 State legal but are not for sale in CA. Different cats for CA.
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Joined: Apr 2004
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How many miles?
Cats are covered by a long warranty. 8/80 for cats.
You can't bypass the sensors. You have to buy some simulator that feeds the false info into ecu.
Why would they fail? Have you done an exhaust pressure test? At about 4 min on the second video they finally show the backpressure, and they only want 1 psi backpressure on this one.
http://www.youtube.com/watch?v=9TlygJMxTps&feature=related[/URL]
Finally at about 4:00 they hook up the gauge. 1 psi backpressure is what they were looking for. You need to pull a sensor ahead of the cat in your case:
http://www.youtube.com/watch?v=4QvR5Nqun4g&feature=related
Cats are covered by a long warranty. 8/80 for cats.
You can't bypass the sensors. You have to buy some simulator that feeds the false info into ecu.
Why would they fail? Have you done an exhaust pressure test? At about 4 min on the second video they finally show the backpressure, and they only want 1 psi backpressure on this one.
http://www.youtube.com/watch?v=9TlygJMxTps&feature=related[/URL]
Finally at about 4:00 they hook up the gauge. 1 psi backpressure is what they were looking for. You need to pull a sensor ahead of the cat in your case:
http://www.youtube.com/watch?v=4QvR5Nqun4g&feature=related
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New User
Joined: Jul 2011
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It has 117,000 miles. I think the cause is that I had some stuttering problems and the code said it was an ignition misfire. I changed the plugs and it ran fine. Now the cats are blocked. How much do the simulators run.
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Elder User
Joined: Mar 2005
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From: Southern New England
Cat may be covered under warrantee with the emissions system, or if it is related to a defective injector.
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Super Moderator
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To the OP: Did you do a backpressure test?
Simulators? just google it, you'll find millions. OK, hundreds, like this:
O2 Sensor Simulator
MAGNUM Car - Truck Performance Chips - Oxygen O2 Sensor Simulators
Check out who you buy from, these seem to smell of snake oil and I wouldn't doubt some are junk.
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Joined: May 2009
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From: Liberty, Mo
Don't assume it's a blocked cat, like others said, do a pressure test... You could just have have a defective oxygen sensor (hell there are 4 of them!). It takes quite a bit to plug a cat so look into the problem a little further before you start trying to trick the computer or go hacking away at your exaust system.
Thread Starter
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New User
Joined: Jul 2011
Posts: 8
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Don't assume it's a blocked cat, like others said, do a pressure test... You could just have have a defective oxygen sensor (hell there are 4 of them!). It takes quite a bit to plug a cat so look into the problem a little further before you start trying to trick the computer or go hacking away at your exaust
system.
system.