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E85 - 13:1 (gasoline AFR) - ACK!

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Old Dec 4, 2008, 10:26 PM
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Originally Posted by Jim in Tucson
According to Autocenter.net MITSU does sell the fuel filter separately for $4.93. It is item #20 on the attached diagram. Has anyone actually bought this filter and proven that it can't be replaced?

I think $107.04 for a new fuel filter by buying the entire assembly seems pretty extreme.

MrFred did you change your fuel filter yet? If so, did it affect your AFRs?

That's not the main filter, that is a sock that is in the passenger side saddle tank. The actual filter is in #14.
Old Dec 4, 2008, 10:28 PM
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Originally Posted by mrfred
The filter housing will be arriving early next week. I'll inspect the old body to see if the filter itself can be extracted.
You won't be able to, it's part of the whole molded assembly and the bottom part is plastic welded on. You will understand when you see it. Trust me I looked into it.
Old Dec 4, 2008, 10:46 PM
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Originally Posted by razorlab
You won't be able to, it's part of the whole molded assembly and the bottom part is plastic welded on. You will understand when you see it. Trust me I looked into it.
Yeah, I kinda figured you would have looked into it. If the filter is clogged, I'm kinda surprised that more people are not having this problem. My car has less than 30K miles on it. I'd guess that people are having the problem but not realizing it.
Old Dec 5, 2008, 12:53 AM
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50K miles on my car and no clogs that i know of. *knocks on wood*
Old Dec 5, 2008, 08:38 AM
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Originally Posted by skiracer
50K miles on my car and no clogs that i know of. *knocks on wood*
Are you daily driving with E85?
Old Dec 5, 2008, 10:37 AM
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Originally Posted by mrfred
Are you daily driving with E85?
I was daily driving E85 for about 2.5 years. However, past 6 months i've been using mostly pump gas since i recently moved 1 hour away from the E85 station
Switching back to pump gas makes my car feel like a Honduh Civic
Old Dec 5, 2008, 12:28 PM
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Originally Posted by razorlab
That's not the main filter, that is a sock that is in the passenger side saddle tank. The actual filter is in #14.
So, Bryan, should this "sock" filter be changed as well as the $107 item?

Old Dec 5, 2008, 12:51 PM
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Im keeping my eye on this too, Im running into the same issue so any updates will be great!
Old Dec 10, 2008, 07:28 AM
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Cut off the stock filter and do a dual pump conversion! a-la buschur double-pumper. I think that's how they get 2 to fit, if I remember right. Then run an aftermarket, inline filter.
Old Mar 30, 2009, 11:38 AM
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I finally have the info that I need to revisit this thread. Back in December when I noticed the AFRs had gone one point leaner, a dirty fuel filter seemed like an obvious reason, but in the back of my mind, I have been wondering whether it might be something else such as E85 not atomizing well in cold weather or perhaps a batch of fuel that was closer to E95.

To fix the 13:1 lean condition back in December, I just richened up the fuel table by 1 pt. That brought the AFRs down to ~11.5:1-12:1. I just got another set of logs this morning with the exact same "richened" tune in the exact same air temps, and the AFRs are right at 11.0:1, so it seems that for whatever reason, my E85 supplier made a batch of fuel in December that was very high in ethanol content. Makes me wish I would have hooked up my E85 gauge long ago (its on the slate for this week or next week).
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