gocart wrote:I just smogged my wife's PT cruiser. (ok, ok, I know). The check engine light was on. I used a tester to clear the code, since it was for the EVAP system and did not affect the tail pipe emissions. A few months ago we had replaced the battery.
It failed because four of the systems were not "ready".
It turns out that to get some of the systems "ready" you must drive CONTINUALLY for at lest FIFTY miles.
The mechanic told me to drive it to Alpine and back and have it retested.
That did the trick and it passed.
Russel, what type of tester will tell you the status of all the systems? The one I have only shows malfunction codes.
Yes on some cars a warm CAT will help lower the emissions.
Anyone have any experience with fuel additives that supposedly lower emissions?
gocart wrote:Anyone have any experience with fuel additives that supposedly lower emissions?
gocart wrote:
Russel, what type of tester will tell you the status of all the systems? The one I have only shows malfunction codes.
lrayner wrote:Oh, it is that dreaded time again and so I wonder. What is the best way to improve your chances of passing a smog test. I am not too worried as it is my Boxster S this time and it is stock. But what improves the odds? There are those cans of mystery liquid that claim to help if you pour them in your gas tank. Clean the air filter? Take it out? I have heard you should make sure the car is hot so the catalytic converters are working optimally, and I have heard contrary advice??? Any hints?
ttweed wrote:gocart wrote:Anyone have any experience with fuel additives that supposedly lower emissions?
I actually had my wife's Miata fail a smog test marginally one time with an NO2 reading that was a little bit high. The guy told me to go put a can of octane booster in the tank, drive it around a little and come back. He retested it and it passed. I wouldn't have believed it if I hadn't seen it.
TT
harnishclan wrote:So took one of my 944 projects to smog and it failed NO with measured rates of 879 against a max of 795 at 15mph and 1181 against 676 at 25 mph. If I understand all the other posts and Dan's specifically. I should add denatured alcohol up to 25% to fuel to drop NO. Other measurements were virtually zero, actually CO was zero at 25mph.
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