Hey guys, i just bought a 1990 honda civic and it woun't pass emssions i don't know what the problem is but the Co% is at 4.0 and its supposed to be at 0.73 and it failed the other thing was i forget i'll post the reading on paper if anyone could help me it would be great.

 

Fill your tank with e85 ethanol then retake the test :D

 

i just put some chevron 91 in mine. do you think i might not pass because of it being 91 octane?

 

you need to get a new catalitic converter. or get a tank full of 85 octane the problem is you arent burning all of your gas and the lower the octane the easier it is to combust the fuel.

 

Yes but ethanol produces no Co2 soooooo ya.

 

glad I live in an area with no emissions tests!

 

up in the AK you can file for a waiver. meaning you only drive it in the summer. who wants to drive a lowerd 11sec honda in the winter anyways?

 

Ok, Well look guys i got the emission readings back here they are:

HC ppm - 244

Co% - 4.25

the limit for these two are:

HC ppm -183

Co% - 0.73

I'm over 61 on the HC ppm and 3.52 on the Co%.

please if anyone can help me i would really appreciate it.

Thx

 

seafoam would probably help, depending on mileage

 

Using high octane to pass the test is a huge myth. I tried it and didn't work.
If your levels are that high you need to get a new catalytic converter. Period.
Just do it and you'll pass. Also make sure not using any ebay cold air intake or something of that sort.

 

up.