hmmm do what I did...

I failed the first time with high numbers in all the areas....in my VX engine...I was like wtf??

I did new plugs, airfilter, fuel filter, injector cleaner...then I ran the piss out of my car before the test.....like if I was racing my engine was hot!!! I went to the test only site and I passed with almost 0.00 in all the areas......just heat up your engine really good....if you engine cooled down before the test that could be the reason you failed....