CJM Report: Effects of E85 after 3 years?

phunk

Some additional afterthoughts:

The fuel filter inside the sending unit looked OK although it was pretty dirty. I had to cut it out to do the Walbro 400 pump install, so I had a really good look at it. I guess I cant compare it to a gasoline 370z filter of the same mileage right now, but I do believe it looked dirtier than average. The paper filter, which many say is not compatible with E85, held up just fine and was not compromised or breaking apart.

Another thought towards the corrosion issue... I do not have an E content gauge to know how potent the ethanol is that I am putting in the car. I am told by those with gauges that its usually in the mid e70s. At my local station, a friend recently told me he got E77 when he filled up there. Perhaps people who are having corrosion issues are getting higher concentration of ethanol? I am unsure how potent the mixture typically is across the country.

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TopgunZ

Charles, Did you take a spark plug out and look at your piston heads? When I pulled mine off my car at 9,000 miles they had a thick layer of carbon on them. After I soaked one with ethanol due to a bad injector, the carbon started "melting" away. I am very curious to look at them again after I put on some miles.

The reason behind the melting is that I put a weld rod into my cylinder to find TDC for a leak down test and when I looked into the soaked cylinder you could see where the rod had been sitting. It was a round spot that was copper colored. I thought I had a chunk of something in there so I freaked out. After I tried with a magnet to get it out it became bigger and bigger till I realized it was carbon just getting pushed around.

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