Flex fuel sensor reading high - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


MEGAsquirt A place to collectively sort out this megasquirt gizmo

Reply
 
 
 
LinkBack Thread Tools
Old 12-04-2015, 12:11 PM   #21
Junior Member
 
Join Date: Jul 2015
Location: Bremerton, WA
Posts: 423
Total Cats: 31
Default

I know what you mean, I'm just busting your *****. E100 isn't 100% ethanol.
Itty is offline   Reply With Quote
Old 12-04-2015, 12:11 PM   #22
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,920
Total Cats: 1,434
Default

Its 100% not gasoline. Which is all I care about.
aidandj is offline   Reply With Quote
Old 12-04-2015, 12:31 PM   #23
mkturbo.com
iTrader: (24)
 
shuiend's Avatar
 
Join Date: May 2006
Location: Charleston SC
Posts: 13,709
Total Cats: 1,080
Default

Quote:
Originally Posted by aidandj View Post
Its 100% not gasoline. Which is all I care about.
It is 100% of ALLOFIT!!!!
shuiend is offline   Reply With Quote
Old 12-04-2015, 12:32 PM   #24
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,920
Total Cats: 1,434
Default

aidandj is offline   Reply With Quote
Old 12-04-2015, 01:02 PM   #25
Elite Member
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 8,654
Total Cats: 235
Default

Quote:
Originally Posted by shuiend View Post
... ALLOFIT!!!!
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.
patsmx5 is online now   Reply With Quote
Old 12-04-2015, 01:13 PM   #26
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,920
Total Cats: 1,434
Default

Quote:
Originally Posted by patsmx5 View Post
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.
coldside wastegate with EBC. Blend boost by ethanol percentage.
aidandj is offline   Reply With Quote
Old 12-04-2015, 02:28 PM   #27
Elite Member
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 8,654
Total Cats: 235
Default

Quote:
Originally Posted by aidandj View Post
coldside wastegate with EBC. Blend boost by ethanol percentage.
Sounds dumb, but probably the only legit way to actually make it driveable in boost on pump gas. So I guess, not dumb?
patsmx5 is online now   Reply With Quote
Old 12-04-2015, 02:30 PM   #28
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,920
Total Cats: 1,434
Default

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.
aidandj is offline   Reply With Quote
Old 12-04-2015, 02:42 PM   #29
Elite Member
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 8,654
Total Cats: 235
Default

Funny part is the "hardware" to do this is already on the car and being used as a bypass valve to cool the SC when not in boost.

But I'll probably never do this, just keep it on E85.
patsmx5 is online now   Reply With Quote
Old 12-04-2015, 02:43 PM   #30
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,920
Total Cats: 1,434
Default

For some reason the wastegate is supposed to be as close to the intake as possible. Even on the actual intake mani if possible.
aidandj is offline   Reply With Quote
Old 12-05-2015, 12:23 AM   #31
Senior Member
iTrader: (4)
 
2manyhobyz's Avatar
 
Join Date: Feb 2011
Location: Joliet, IL
Posts: 622
Total Cats: 16
Default

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
2manyhobyz is offline   Reply With Quote
Old 12-05-2015, 12:29 AM   #32
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,920
Total Cats: 1,434
Default

Don't use the megamanual. It's not for the msextra codebase.
aidandj is offline   Reply With Quote
Old 12-05-2015, 12:33 AM   #33
Senior Member
iTrader: (4)
 
2manyhobyz's Avatar
 
Join Date: Feb 2011
Location: Joliet, IL
Posts: 622
Total Cats: 16
Default

Quote:
Originally Posted by aidandj View Post
Don't use the megamanual. It's not for the msextra codebase.
My bad, as usual I know just enough to be dangerous.
2manyhobyz is offline   Reply With Quote
Old 12-05-2015, 12:39 AM   #34
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,920
Total Cats: 1,434
Default

Other link is good

I have another flex fuel thread with links to Miata maps with flex blending.
aidandj is offline   Reply With Quote
Old 01-31-2016, 09:20 PM   #35
Senior Member
iTrader: (3)
 
Join Date: Oct 2008
Location: Indianapolis
Posts: 613
Total Cats: 12
Default

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?
btabor is offline   Reply With Quote
Old 08-11-2016, 10:41 PM   #36
Tweaking Enginerd
iTrader: (2)
 
Join Date: Mar 2013
Location: Boulder, CO
Posts: 443
Total Cats: 33
Default

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.
Ted75zcar is offline   Reply With Quote
Old 08-12-2016, 06:59 PM   #37
Newb
Thread Starter
 
Join Date: Dec 2012
Location: KY
Posts: 24
Total Cats: 0
Default Solved

Thanks guys for all your input i replaced my flex fuel sensor with another one and it reads correctly. enjoying my summer with a bit of corn
willerdcraft is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1992 Miata - Smiles Per Gallon AngelGdo Build Threads 13 07-05-2016 09:50 PM
Fuel pump shuts off at low RPM ryansmoneypit MEGAsquirt 23 12-08-2015 09:29 AM
MS2 1.6 Fuel Pump Mod on SPR4? ennjay MEGAsquirt 10 12-07-2015 07:05 AM
FS: White Hard Top - Great shape Braineack Miata parts for sale/trade 7 12-03-2015 11:46 AM
EBC duty cycle never changes whinin MEGAsquirt 16 11-29-2015 01:43 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:10 PM.