PO420 code came up, probably need a new converter, any recommendation? (1 Viewer)

[ramrod1827]

Been looking through the threads and people are all over the place on what to do about the CAT. I dont want to lose HP, but at the same time I dont want it to smell like exhaust hardcore and my kids to breathe it in every time I fire it up in the garage

 

[amgraham]

What year? If it's the newer inline style just get the Magnaflow Y pipe. Try to confirm it is an actual Magnaflow and not Bosal. Search around and there are a few threads on it. I've been running mine for over a year with no codes or fumes.

 

[ramrod1827]

Sorry, its a 95 with full OBDII

 

[thelal]

check you don't have some air holes on your exhaust. Mine are around header to exhaust connection. I keep plugging and it lasts several days and then restart. Will replace with new SS eventually

 

[Tools R Us]

As mentioned, exhaust leak, sensor failure or sensor wiring/connector are more common causes of a P0420 than a bad cat. That code is just an emission monitor, has no effect on motor tune, my first test is to reset and see how soon it comes back.

 

[studawg]

1995-1997 FZJ80 EGR Temp Sensor Test Plug Kit

EGR, EGR delete, 97 Land Cruiser EGR, Land Cruiser P0401, P0402

huddexpo.com

 

[ramrod1827]

I cut the dual cats and put a single magnaflow and all seems good now

 

[FastCarGuy]

This worked for me: Amazon product ASIN B003J25IF8 I installed when I went to 3" exhaust. It comes in 2-1/2" also

 

[ramrod1827]

I got
MagnaFlow 99006HM Universal Catalytic Converter (Non CARB Compliant) Amazon product ASIN B001HMAYAQAnd had it welded to fit
Most posters said it wouldnt boost performance but I'm pretty confident my 80 is running better, on top of I can park in my garage without almost passing out