Flex fuel sensor reading high
12-04-2015, 01:02 PM
#25
Now we're talking! 
I might install a flex fuel one day, we'll see. The big problem for me is I can't run on pure gasoline at 28 PSI without detonation, and the amount of timing I have to pull to keep it from detonating is unacceptable from an EGT standpoint. So all I could really use it for is to compensate for different E85 blends, but so far in TX, I haven't noticed any change so far. E70 is the minimum here, so maybe it's not enough difference to notice.
I might install a flex fuel one day, we'll see. The big problem for me is I can't run on pure gasoline at 28 PSI without detonation, and the amount of timing I have to pull to keep it from detonating is unacceptable from an EGT standpoint. So all I could really use it for is to compensate for different E85 blends, but so far in TX, I haven't noticed any change so far. E70 is the minimum here, so maybe it's not enough difference to notice.
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12-04-2015, 01:13 PM
#26
SADFab Destructive Testing Engineer
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Now we're talking!
I might install a flex fuel one day, we'll see. The big problem for me is I can't run on pure gasoline at 28 PSI without detonation, and the amount of timing I have to pull to keep it from detonating is unacceptable from an EGT standpoint. So all I could really use it for is to compensate for different E85 blends, but so far in TX, I haven't noticed any change so far. E70 is the minimum here, so maybe it's not enough difference to notice.
I might install a flex fuel one day, we'll see. The big problem for me is I can't run on pure gasoline at 28 PSI without detonation, and the amount of timing I have to pull to keep it from detonating is unacceptable from an EGT standpoint. So all I could really use it for is to compensate for different E85 blends, but so far in TX, I haven't noticed any change so far. E70 is the minimum here, so maybe it's not enough difference to notice.
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12-04-2015, 02:30 PM
#28
SADFab Destructive Testing Engineer
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I wasn't really kidding. Ive seen emilio mention it before, and seen it done in a few random places online. And its actually quite simple, and mechanical.
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12-05-2015, 12:23 AM
#31
Subbed for more info. I just installed one of these also.
I bought this tester:
One Tester to Check Your E85 and Gasoline Fuel for Ethanol Levels | eBay
You guys probably have seen this stuff already, but here it is anyway.
Megasquirt Support Forum (MSEXTRA) ? Set up Continental Flex Fuel Sensor 13577394 (View topic)
and
Flex Fuel with MegaSquirt
I bought this tester:
One Tester to Check Your E85 and Gasoline Fuel for Ethanol Levels | eBay
You guys probably have seen this stuff already, but here it is anyway.
Megasquirt Support Forum (MSEXTRA) ? Set up Continental Flex Fuel Sensor 13577394 (View topic)
and
Flex Fuel with MegaSquirt
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01-31-2016, 09:20 PM
#35
I don't have a flex fuel gauge yet and I'm about to dyno tune my car. I got a fuel sample test kit to know how much ethanol my "e85" has. If it's low on ethanol, let's say 75% and I tune for that, my understanding is that it will be safer in the summer when I get true e85. Yes, I may not extract it's full potential but it should be safe, right?
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08-11-2016, 10:41 PM
#36
Tweaking Enginerd
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Thread from the dead, but potentially relevant
I installed the Continental long tube sensor part number 13577394 and also had readings of ~35% on E10. I bumped around the google, and it sounds like several people have gotten very similar readings from this sensor out of the box. We have measured ~75Hz with air, ~85Hz on what may be E10 pump gas, and around 150Hz on whatever blend our e85 actually is. I took it a step further and ran water through it, 190Hz.
It seems getting one that provides the typical 50-150Hz range is a bit hit and miss. I will be putting some E0 through this one sometime here soon, as well as possibly some 70% ethanol water.
I will also be ordering another sensor. This one was sold as new Continental Branded, but it came from China, so I bet it is counterfeit.
I installed the Continental long tube sensor part number 13577394 and also had readings of ~35% on E10. I bumped around the google, and it sounds like several people have gotten very similar readings from this sensor out of the box. We have measured ~75Hz with air, ~85Hz on what may be E10 pump gas, and around 150Hz on whatever blend our e85 actually is. I took it a step further and ran water through it, 190Hz.
It seems getting one that provides the typical 50-150Hz range is a bit hit and miss. I will be putting some E0 through this one sometime here soon, as well as possibly some 70% ethanol water.
I will also be ordering another sensor. This one was sold as new Continental Branded, but it came from China, so I bet it is counterfeit.
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