C-Mart Posted June 27, 2012 Report Share Posted June 27, 2012 I have become admittedly bad at working on my own cars since I live downtown on a main road. My mechanic told me one of my cats was getting clogged and I refuse to fork out the $600 he wanted for a new one. Does anyone sell test pipes aka bolt on straight through pieces in place of the cat converters? Are these guttable? 2005 4 door F150 with a 5.4 Quote Link to comment Share on other sites More sharing options...
351mach11647545510 Posted June 27, 2012 Report Share Posted June 27, 2012 unless they build them differently now, you can knock the stuff inside out of them Quote Link to comment Share on other sites More sharing options...
99FLHRCI Posted June 27, 2012 Report Share Posted June 27, 2012 I have become admittedly bad at working on my own cars since I live downtown on a main road. My mechanic told me one of my cats was getting clogged and I refuse to fork out the $600 he wanted for a new one. Does anyone sell test pipes aka bolt on straight through pieces in place of the cat converters? EBay...will end up with a check engine light and a lean condition with out programming it. Are these guttable?Yes...will end up with a check engine light and a lean condition with out programming it. 2005 4 door F150 with a 5.4 You will need to have it tuned if you eliminate the catalytic convertors. Quote Link to comment Share on other sites More sharing options...
Sully Posted June 27, 2012 Report Share Posted June 27, 2012 Did he tell you which one exactly? I believe there are 4 on these trucks. Quote Link to comment Share on other sites More sharing options...
C-Mart Posted June 27, 2012 Author Report Share Posted June 27, 2012 Why would I need to get it tuned? And no, but I am sure I could call and find out. I know it is driver's side, but that doesn't help. Quote Link to comment Share on other sites More sharing options...
KillJoy Posted June 27, 2012 Report Share Posted June 27, 2012 [/url]CLICKY :thumbup: KillJoy Quote Link to comment Share on other sites More sharing options...
99FLHRCI Posted June 28, 2012 Report Share Posted June 28, 2012 Why would I need to get it tuned? And no, but I am sure I could call and find out. I know it is driver's side, but that doesn't help. Because their is a post catalytic convertor oxygen sensor that sends a signal to the ECU. The ECU then compares the post catalytic signal to the pre catalytic signal to ensure that the catalytic convertor is doing it's job and cleaning the exhaust. As a default if the catalytic convertor is not functioning properly, the car leans itself out to limit the amount of hydrocarbons in the exhaust. So if you get it tuned, you can get the post catalytic sensors "shut off". The ECU no longer looks for this signal or changes the fuel mixture. Quote Link to comment Share on other sites More sharing options...
C-Mart Posted June 28, 2012 Author Report Share Posted June 28, 2012 Because their is a post catalytic convertor oxygen sensor that sends a signal to the ECU. The ECU then compares the post catalytic signal to the pre catalytic signal to ensure that the catalytic convertor is doing it's job and cleaning the exhaust. As a default if the catalytic convertor is not functioning properly, the car leans itself out to limit the amount of hydrocarbons in the exhaust. So if you get it tuned, you can get the post catalytic sensors "shut off". The ECU no longer looks for this signal or changes the fuel mixture. Interesting... So it looks like the weld in ones from Jegs would be my best bet? Quote Link to comment Share on other sites More sharing options...
iwashmycar Posted June 28, 2012 Report Share Posted June 28, 2012 Probably. Also might want to check the smog pump and all that shiz since it pumps the air down there to keep the buggers clean(er). If it isnt doing it's job, your just going to end up clogging the new ones! Quote Link to comment Share on other sites More sharing options...
99FLHRCI Posted June 28, 2012 Report Share Posted June 28, 2012 It may also not hurt to have someone from the board with a scan tool take a quick look at it. It may be a bad or lazy o2 sensor. I would hope it was diagnosed right but, a second opinion never hurts. I rarely have ever had a bad catalytic convertor come in for failure/clogging but have replaced o2 sensors by the dozen. If you are in the Marysville area I would be happy to look at it. Quote Link to comment Share on other sites More sharing options...
C-Mart Posted June 28, 2012 Author Report Share Posted June 28, 2012 I appreciate the offer, but I am unfortunately not in that area. The shop scanned it and nothing O2 related came up. Plus, a bad O2 would not cause the rattle sound it is making. I have heard the heat shields can loosen up, but I need to get under there to see what is going on. Quote Link to comment Share on other sites More sharing options...
SPL_Josh Posted June 28, 2012 Report Share Posted June 28, 2012 Mechanic said cats need replace...several posts later...the shop that scanned it said nothing 0² related came up... Lol wtf. Why did the mechanic say catalytic convert if no corresponding codes are prevalent. Quote Link to comment Share on other sites More sharing options...
C-Mart Posted June 29, 2012 Author Report Share Posted June 29, 2012 They said the cats need to be replaced because they are making a rattling noise. Nothing bad under regular driving, but if you are in an alley/drive up window you can hear a really annoying rattling sound. Quote Link to comment Share on other sites More sharing options...
99FLHRCI Posted June 29, 2012 Report Share Posted June 29, 2012 Take a rubber mallet and hit the convertor. If it rattles then it needs replaced to stop the rattling. Personally I would deal with it till it caused a problem and tripped a light. I understand that some people would get annoyed with the noise and replace it though. Quote Link to comment Share on other sites More sharing options...
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