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E85 Continental Flex Fuel Sensor Info

Old 04-24-2017, 04:55 PM
  #41  
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I stumbled across this video and wondered if anyone had any other information on flex sensors and false ethanol content readings due to water contamination. It looks like he's using a run of the mill large Conti sensor that is popular among most tuning platforms.

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Old 04-24-2017, 05:22 PM
  #42  
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That was a pretty ridiculous amount of water he added. 10%? 5%? Thats like a gallon of water in your fuel tank.

At the end he also claims that mixing in gasoline and e85 is just as detonation proof as the "pure" e85.
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Old 04-24-2017, 06:11 PM
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I'll take that as deviation is otherwise negligible considering the volume percent of condensation found in tank at any given time, unless someone maliciously added water.
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Old 10-23-2017, 02:30 PM
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Originally Posted by farpolemiddle View Post
Used the charcoal mount by bending the tabs in. I would NOT recommend the small sensor. It is a pain to mount. I would use the medium or large if I did it again. Used Dorman 3/8 steel to 5/16 barb 90s. They are meant for nylon so I added fuel clamps to the barbs just in case. Hopefully I don't burn to death. I used the stock return line and used a brake line bender to adjust the stock return line. Waiting on my pigtail and wire from amazon to get it running.



*Pigtail arrived. It is not working. Of course my soldering iron and my voltmeter both died. All I have is a test light and crimp fittings. Tried to use the o2 wire. When it did not work ran a temp jumper signal outside of the car to the edu and still nope. Best I can do for now. Going to have to wait for new voltmeter from amazon to figure it out.
Were you able to get the small sensor to work? I am wondering if this small sensor uses the same settings as the larger sensors. Other than the issues mounting the sensor, did the sensor work correctly?

Last edited by MX5RACER; 10-23-2017 at 05:11 PM.
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Old 10-23-2017, 04:06 PM
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Originally Posted by codrus View Post
Basically I've come over to the camp of "If something is a reliability problem on the track, just ask Andrew and do what he says".
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Old 10-23-2017, 04:56 PM
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With regards to water in E85 I wonder how this affects the tune? Water injection can be damn effective at reducing detonation so I can't see problems with timing. Higher % of ethanol means increased injector duty cycle so realistically it's probably a wash at concentrations most are likely to see.

On the other hand I was surprised to see my catch can accumulate as much water as it did. Makes me wonder how much water was in the last batch of E85.
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Old 10-23-2017, 09:35 PM
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Originally Posted by k24madness View Post
On the other hand I was surprised to see my catch can accumulate as much water as it did. Makes me wonder how much water was in the last batch of E85.
Are you thinking the extra water in your catch can is from the water in the e85 you put in the tank? I think the chemical reaction of the fuel burning is making far more water than whatever is actually in the fuel.
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Old 10-24-2017, 10:41 AM
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Originally Posted by MX5RACER View Post
Were you able to get the small sensor to work? I am wondering if this small sensor uses the same settings as the larger sensors. Other than the issues mounting the sensor, did the sensor work correctly?
I found some documentation from AEM for their Flex Fuel Sensor and it looks to be the small sensor referenced above. According to page 4 of their instructions, the frequencies look the same as what I have seen listed for the large and medium sensors. I am running E85 currently without the flex fuel sensor as a test. I made it to the station (Known to have consistent E85 at around 80-85% by some people who actually have functional flex fuel sensors) on fumes and filled the tank with E85. I went in to the settings and increased the required fuel by 35%, then waited for the wideband to show the AFR's leaning out as it went from 93 to E85. I then started doing some autotuning to refine the fuel map. I will do some more tuning today and tomorrrow morning and am scheduled to put the car on the dyno tomorrow afternoon. If I see some decent gains with E85 (I define decent as more than 5% increase in power) I am going to pick up the smaller sensor and install it.

AEM Documentation referenced above:
http://aemelectronics.com/files/inst...nsor%20Kit.pdf
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Old 10-25-2017, 04:01 AM
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Small one did not work for me. ****** was dead on arrival. Which was fun because I doubted my wiring and went through a bunch of drama checking everything not thinking it could be bad from the factory.
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Old 11-01-2017, 02:46 PM
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Anyone tried the ones from China? I see a few on ebay at $30.
I am suspect but sometimes it's all of Chinese origin and really just comes down to how much you pay at the end..
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Old 11-01-2017, 05:41 PM
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Originally Posted by YeboGoGo View Post
Anyone tried the ones from China? I see a few on ebay at $30.
I am suspect but sometimes it's all of Chinese origin and really just comes down to how much you pay at the end..
No personal experience yet, but I recently had the same thought and research showed it wasn't worth gambling on the cheap chinese sensors.
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Old 11-01-2017, 06:50 PM
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Originally Posted by SpartanSV View Post
No personal experience yet, but I recently had the same thought and research showed it wasn't worth gambling on the cheap chinese sensors.
Sadly I'm hearing and feeling that logic about a lot of things lately :/ At the end of the day its all probably coming from the same factory
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Old 01-22-2018, 12:11 AM
  #53  
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Originally Posted by farpolemiddle View Post




Used the charcoal mount by bending the tabs in. I would NOT recommend the small sensor. It is a pain to mount. I would use the medium or large if I did it again. Used Dorman 3/8 steel to 5/16 barb 90s. They are meant for nylon so I added fuel clamps to the barbs just in case. Hopefully I don't burn to death. I used the stock return line and used a brake line bender to adjust the stock return line. Waiting on my pigtail and wire from amazon to get it running.



*Pigtail arrived. It is not working. Of course my soldering iron and my voltmeter both died. All I have is a test light and crimp fittings. Tried to use the o2 wire. When it did not work ran a temp jumper signal outside of the car to the edu and still nope. Best I can do for now. Going to have to wait for new voltmeter from amazon to figure it out.
Resurrecting this, farpolemiddle how is the 5/16 fuel hose doing with the clamps on the quick connect nylon barbs? Debating on doing this same setup with my flex sensor. Or doing the Quick connect to AN metal fittings...
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Old 05-11-2018, 04:39 PM
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good thread
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Old 05-12-2018, 04:00 AM
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-1 cat, no sad, ordered sensor on ebay and saved over half my money, someones mad
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Old 05-12-2018, 04:27 AM
  #56  
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I sure hope you got a proper one and didn't get some china knockoff like some on ebay
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Old 05-12-2018, 02:30 PM
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Originally Posted by 18psi View Post
I sure hope you got a proper one and didn't get some china knockoff like some on ebay
It's the same continental flex sensor sold by all the vendors here, same name / model
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Old 05-12-2018, 02:34 PM
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yes. Just like the ebay walbro fuel pumps that have exact same name/model/stamp on them but are junk and many people got scammed with
also like ebay ID1000's which look identical except the logo is a sticker and not laser etched.

there are many fakes out there is what I'm saying. they all look the same
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Old 05-12-2018, 02:51 PM
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Originally Posted by 18psi View Post
yes. Just like the ebay walbro fuel pumps that have exact same name/model/stamp on them but are junk and many people got scammed with
also like ebay ID1000's which look identical except the logo is a sticker and not laser etched.

there are many fakes out there is what I'm saying. they all look the same
**** - didn't know that, hope mines good.
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Old 09-07-2018, 07:12 PM
  #60  
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How do you recognise a fake from an original?
I sent an email to continental but no answer.
I bought one on ebay, paid import tax (product came from USA), sold as genuine sensor, but there was no GM label or part number.
https://www.ebay.fr/itm/New-Genuine-...53.m2749.l2649
Any thoughts?
cheers
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