Hey guys, having some smog / aircare test hassles even with fairly recent tune-up a new Magnaflow cat. Seen a few old posts about running a bit of denatured alcohol just before the test.

Does this help bring down hydrocarbons and any adverse effects on the car afterwards?

Thanks in advance !

After a good thrash, with mohawk ethanol based gas, drive test only;

Hydrocarbons HC limit, .50, 1.20 score, fail
Carbon Monoxide, 9.32 limit, 3.66 score, pass
Oxides of nitrogen, 1.24 limit, 1.12 score, pass

 

I would sooner get a gallon of E85 if you can, denatured is basically ethanol but I do not believe it is as "dry".

 

Thanks, seems its not so easy to fine. Methyl hydrate is, but don't here any good comments about it....

 

Well adding ethanol did nothing, but a fixing vaccuum leak sure helped, Hydro carbons pass, CO pass.... Nox fail, but it looks like a faulty EGR ..close....