CentralCoaster wrote:
I would NEVER disconnect the battery before a smog test that included idle. Was your idle rock solid rpm? The smog tests here don't care what your average reading is during the test, it only takes one blip above the limit to fail you, so a solid idle is very important. Luckily they got rid of the idle test though.

Your idle CO, while passing, isn't ok either, it should be much lower.

What is your code for?

I've used that "guaranteed to pass" I guess it burns much more cleanly than normal gas. I have no idea what difference it made without doing back to back tests.

I've used seafoam too. I will never again, as I don't feel comfortable risking hydrolock on my car. I probably hydrolocked my LTD with it awhile back and bent a rod, but it was junk anyways.

That hole can't be helping, it's letting unmetered air into your car. Not a whole lot as there isn't much vacuum behind the filter though at idle. But idle is finicky so you want that maf getting everything.

I'd fix that code properly, plug the hole, drive it a few trips to learn the idle, then run the car hard to redline on a few onramps, and smog it hot.

My vette gets excellent mpg after a track day, so I reason that it will help the smog check too.