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Old 06-18-2017, 11:21 PM   #1
fiatlux
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Default Crank but won't start after filling up on E85

As luck would have it on a Sunday, my car cranks but won't start at the gas statiom after filling up on E85. I have the Cobb Flex Fuel kit installed and before the fillup, I was at 30% ethanol. The first time the car did start but the idle was very rough (almost like running E85 on a pump gas tune) so I shut it down. Now, it cranks but no longer turns on. The AP says ethanol content is at 31.9%, so I suspect it may be a fueling issue since the tank was low when I filled up. I tried running both the old 91 tune and a regular E85 tune, but the car doesn't start on either, so I don't think it's a tune issue. I hear the fuel pump relay click behind the glove box, but I don't think I hear the fuel pump priming under the rear seat, so I suspect it may be that. Anyone have any other thoughts on what might be the issue? I've been sitting here at gas station for the last 2 hours waiting for AAA to find a flatbed tow truck that can come out, so I've got plenty of time to burn. Unfortunately I don't have the tools with me to check the coil packs and spark plugs to rule those out
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Old 06-19-2017, 12:13 PM   #2
Zcypot
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I used to get this too, but the car never failed to start. Pumping E85 would make the start shake like crazy for a bit, then a week later my engine went out. With the new engine, I been mixing the 91 and E85, and now I am at 80% ethanol again and I have yet to experience that same shaking when the ethanol % is rising.


Hope to hear an update
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Old 06-21-2017, 08:30 PM   #3
rexxx161
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Any follow up on this? Faulty fuel or failed crank position sensor?
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Old 06-21-2017, 08:58 PM   #4
fiatlux
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Originally Posted by rexxx161 View Post
Any follow up on this? Faulty fuel or failed crank position sensor?
I was going to put in my stock fuel pump to see if it works...but unfortunately I can no longer find it. I may just have to bite the bullet and tow it into the shop to have them take a look see because I need the car back soon and it would take me a lot longer to figure this out.
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Old 07-05-2017, 02:04 PM   #5
wrxlaunch
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Do you have a flex fuel tune?
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Old 07-05-2017, 02:20 PM   #6
Zcypot
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Do you have a flex fuel tune?
I am hoping that was covered first before the car ever saw E85
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Old 07-06-2017, 10:02 AM   #7
wrxlaunch
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Quote:
Originally Posted by fiatlux View Post
As luck would have it on a Sunday, my car cranks but won't start at the gas statiom after filling up on E85. I have the Cobb Flex Fuel kit installed and before the fillup, I was at 30% ethanol. The first time the car did start but the idle was very rough (almost like running E85 on a pump gas tune) so I shut it down. Now, it cranks but no longer turns on. The AP says ethanol content is at 31.9%, so I suspect it may be a fueling issue since the tank was low when I filled up. I tried running both the old 91 tune and a regular E85 tune, but the car doesn't start on either, so I don't think it's a tune issue. I hear the fuel pump relay click behind the glove box, but I don't think I hear the fuel pump priming under the rear seat, so I suspect it may be that. Anyone have any other thoughts on what might be the issue? I've been sitting here at gas station for the last 2 hours waiting for AAA to find a flatbed tow truck that can come out, so I've got plenty of time to burn. Unfortunately I don't have the tools with me to check the coil packs and spark plugs to rule those out
If not Flex Fuel Tuned... there is your problem
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Old 07-06-2017, 05:19 PM   #8
Charlie-III
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Quote:
Originally Posted by wrxlaunch View Post
Do you have a flex fuel tune?
Quote:
Originally Posted by wrxlaunch View Post
If not Flex Fuel Tuned... there is your problem
Really read the middle of post 1. We can only go by what is posted.
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