Removed RB exhaust and put on stock exhaust system. Hooked up air pump directly to cat.

1st test: Fail

High speed 2500rpm
HC 78/200
CO 1.25/1.20 <---failed by .05


Low Speed 750rpm
HC 91/200
CO .59/120

2nd test: Denatured alcohol and 5 gallons of 88 octane. Failed again

High Speed
HC 48/200
CO 1.25/1.20 <---again failed by 0.05

Low speed
HC 62/200
CO .35/120

Everything else was lowered, but still failed by the same amount on high speed rpm for CO. I thought the alcohol trick would work and wanted to see how big of an effect it had. Suprising it didn't move the CO at high speed. So I bought new spark plug wires and plugs.

3rd test: Passed
High Speed
HC 80/200
CO 0.50/1.20

Low speed
HC 134/200
CO 0.35/120

At least I passed, but I was suprised to see that all the readings became higher except for CO output, just by using new plugs/wires and still using denatured alcohol. Just thought I'd share.

 

Hey i was curious how much denatured alcohol you put in your gas tank and where can I get some of it? I am going to try to do the same thing in order to pass.... thanks

 

Home depot, or any paint store. At HD it was $12 for a gallon, I think paint stores should be a little cheaper. I just mixed 1 gallon with about 5 gallons of gas. Just drive around without boosting or getting high load I suppose and no problems. I would have probably passed without it, by first just changing the plugs and wires, but it defnintely helps.