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Originally Posted by DoomsdayJesus
EPA standards are not stringent. They pretty much suck, and those are more driven by the oil industry than top tier.
The proof's in the pudding. If you cared to seriously read the link I provided, you'd see gas chains have to pay about 30K to get tested, and have to demonstrate that their fuel does not have significant buildup over time or cause valves to stick. They have extraordinarily strict standards, established by automakers and not oil companies.
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A link to anything that isn't third part is next to useless to me. That's like asking if Visconti is a reliable tuner and someone posting a link to his website saying 'Yes my stuff is reliable'.
I tried doing the homework, I could not find any third party studies, data, or information. Until I or someone else comes across something I will publicly call it bullshit.
Quote:
Originally Posted by xxBrun0xx
So I did some digging and apparently e10 burns hotter than both e0 and e85, which both have been claimed fixes. If these claims are true, then obviously, too much heat is the culprit. This makes sense, since crickets cannot be heard on cold start, but rather after car is warmed up at idle and why the crickets aren't as prevalent in cold weather.
The two systems potentially at fault that have been discussed are the high pressure fuel pump and the injectors. Now, to me, injectors would make more sense based on the fact that they are being exposed to combustion heat much more directly than the fuel pump. Although when dealerships replace fuel pumps, the crickets do seem to go away temporarily, so maybe it is the fuel pump at fault? Any thoughts?
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It is
not obvious that the heat produced via combustion is the culprit. Did a quick google search and here's an SAE article from MIT displaying that ethanol has a lower flame temperature than gasoline and when mixed you get a fairly linear relationship: (Note it will load as a pdf file)
http://www.google.com/url?sa=t&rct=j...,d.cGE&cad=rja
I think it's fair to ask if the injectors may be the culprit and I don't have a hard answer other than referencing what others have posted. Quickest answer would be to look at a car that has crickets and make a cheap stethoscope out of a piece of hose and stick it up to the fuel pump and then as close to the injectors as you can get to try and locate the noise. If that isn't evidence enough then dig deeper.