failed emission/catalytic con.

[sodja007]

Recently just bought my 3rd Celica, it's a '91 Celica GT-S, I just took it to inspection and failed because of high emission. I was told I could buy fuel injection cleaner and would be able to pass inspection but I failed again

I took my car to a mechanic, I was told I needed to buy a catalytic converter, I did some browsing around and I kept noticing that my catalytic converter is connected to my headers and would have to buy both in order to get it replaced, is this true ?



First NO2 level was 1502
Second NO2 level after the fuel injector cleaner was 1194
And standard level should be lower than 1134
Yeah I know, second time I almost passed


Will appreciate any replies or tips ! Thank you !

[jlspec]

I don't think you need to buy both. I believe the CAT is bolted on to the headers not a one piece.

[Rick89GTS]

For your 5SFE engine, you can unbolt the cat from the exhaust manifold. It's not all one piece.

[concealer404]

Go out.... beat the CRAP out of your car for about 30 minutes, then go get it tested. You're close enough that it seems silly to buy a new cat for what.... 60 points?

[elcapatante]

I had the same readings. My mechanic, if I recall correctly, vacuumed the carbon out, cost me $90. Cut the readings in half. My dad, a retired mechanic, told me to "beat the crap of it".

[toyomoho]

Might check for clogged EGR valve.

[95GT]

My 91gt had the same problem. I took it to a muffler shop and he removed both cats, he "gutted" one and put it back on and replaced the other. All was well and it passed smog.