Flex Fuel

2010 FORD CROWN VICTORIA
180,000 MILES • 4.6L • V8 • RWD • AUTOMATIC
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FRED54456
  • MEMBER
  • 1 POST
My car is a Flex Fuel and runs smooth only when using E85 gasoline. Older models had a Flex Fuel Sensor, I understand this does not. If I use regular 10% Ethanol gas it runs rough at 30/35 in town. I have had several older Flex Fuel Crown Victoria's that had no problem with regular gas. Any Ideas if I can use regular?
Jun 1, 2016 at 1:12 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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HMAC300
  • CAR REPAIR CONTRIBUTOR
  • 48,601 POSTS
try cleaning throttle plate on both sides and iac hole with choke cleaner if that does not work scan for codes. there should not be any problem switch ig between the two.
Jun 1, 2016 at 4:01 PM
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RENEE L
  • CAR REPAIR CONTRIBUTOR
  • 1,260 POSTS
Hi Fred54456,

Here is a link to an article that features written step by step instructions and pictures explaining how to do the scan yourself, also I have included a link to our YouTube channel with a how to video on code scanning. Most scanners are inexpensive to purchase, you can purchase one online from sites like Amazon.com. Once you have the codes please get back to us so that we can further assist you. We are always happy to help.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

https://youtu.be/YV3TRZwer8k

Thank you for visiting 2CarPros.com.

Kindest regards,

Renee
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Jun 5, 2016 at 12:10 PM