E-30 emissions cheat..?

StinkinLinkin13 · May 14, 2019, 11:14:17 AM

So I had noticed that since running E30 mix... Even on a stock tune (for service reasons) I never had a CEL for Converter inefficiency despite having NO converters.... Put over a hundred miles on it with the stock tune before I took it in... Anyone else experience this great side effect of E30 blends. We don't have emissions testing in SATX so idk that it would pass that... but definitely clean enough to not trigger a CEL (nothing even pending).

18SHO · May 14, 2019, 11:47:06 AM

Quote from: StinkinLinkin13 on May 14, 2019, 11:14:17 AM
So I had noticed that since running E30 mix... Even on a stock tune (for service reasons) I never had a CEL for Converter inefficiency despite having NO converters.... Put over a hundred miles on it with the stock tune before I took it in... Anyone else experience this great side effect of E30 blends. We don't have emissions testing in SATX so idk that it would pass that... but definitely clean enough to not trigger a CEL (nothing even pending).

Wow I'm curious on this, if the stock tune never threw a code your probably good to go to get emissions check. The CEL would be the issue getting the car to pass but no CEL you'll pass

SM105K · May 14, 2019, 11:54:01 AM

I have heard of guys running E30 on stock tunes and not getting any codes. They aren't getting the most out of the fuel without a proper E30 tune. I am shocked the stock tune didn't throw a code because there are no cats period. Very interesting indeed.

Jordan · May 14, 2019, 12:07:33 PM

Honestly in my non expert opinion I'm assuming the catalytic deficiency codes just haven't caught on yet. 100 miles really isn't much. Now if you had a thousand miles then you'd have my curiosity

StinkinLinkin13 · May 14, 2019, 01:32:15 PM

The reason it got my attention is because when I had my 13 MKS with the same mods no cats I would run 93 and would ALWAYS have codes for catalysts inefficiency.. the CEL would be disabled by the tune on the cluster but if I would manually check with the calibrator or a scan tool the codes would always be there. I pretty much started running E30 right away with this 16 MKS and even tho catless I've never had a check engine light code (hard or pending)... Stock or Tuned... I understand that running E30 with the stock tune isn't really much of a benefit performance-wise but emissions seems like it may help some people who have to deal with that testing... I haven't tried running anything less than E30 yet but I wonder where that minimum ethenol threshold is.

Macgyver · May 14, 2019, 03:33:50 PM

Not saying this has anything to do with it or not but my Exhaust tips stay perfectly clean on my AJP E30 tune.

18SHO · May 15, 2019, 11:39:35 AM

Quote from: Macgyver on May 14, 2019, 03:33:50 PM
Not saying this has anything to do with it or not but my Exhaust tips stay perfectly clean on my AJP E30 tune.

You and me both the soot cut down drastically

Macgyver · May 15, 2019, 11:46:40 AM

Considering the price. AJP has an E85 tune. I wonder if it would also keep your car within emisaions.

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6500rpm · July 13, 2019, 05:28:02 PM

I'd be curious how this pans out long term too and what the A/F ratio is running at. Essentially all the cats do is take out the peaks and valleys of what's left over after combustion, for it not to throw a code it has to be running at nearly 100% efficiency and E30 is still mostly gasoline. On the base tune it's managed to not only skirt the non catted system, but do it without setting lean pre cat codes. Pretty interesting to say the least. Is it a function of the lambda style sensor?