On a stock converter, to check if it is bad once removed, is the light test the method of choice? If so, how much light should you be able to see through it?
I have been fighting the PO420 on my 1996 2.7L for some time. I replaced the factory cat with a Magna Flow, replaced both sensors with Denso, put Denso plugs in it, cleaned the MAS, and again have the PO420. I can not find any exhaust leaks. I took it to the Toyota Dealership and told them to look for anything which might be causing the code or messing up the cat to get the code. I have no way of knowing exactly how hard they looked, but the said they thought it was the aftermarket cat.
I having been looking at the original cat, approximately 160K, and I can see a flashlight through it, but it is faint. I blew air through it with the compressor and it flows, but not at nearly the volume as just blowing it the same distance without going through the cat.
I may have to purchase a factory cat at the high price, but don't want to do it and find out I did not need it and it is something else. I had the Magna Flow on about 5K before the code came back.
Any help or ideas is appreciated.
I have been fighting the PO420 on my 1996 2.7L for some time. I replaced the factory cat with a Magna Flow, replaced both sensors with Denso, put Denso plugs in it, cleaned the MAS, and again have the PO420. I can not find any exhaust leaks. I took it to the Toyota Dealership and told them to look for anything which might be causing the code or messing up the cat to get the code. I have no way of knowing exactly how hard they looked, but the said they thought it was the aftermarket cat.
I having been looking at the original cat, approximately 160K, and I can see a flashlight through it, but it is faint. I blew air through it with the compressor and it flows, but not at nearly the volume as just blowing it the same distance without going through the cat.
I may have to purchase a factory cat at the high price, but don't want to do it and find out I did not need it and it is something else. I had the Magna Flow on about 5K before the code came back.
Any help or ideas is appreciated.