Hello someone has to use FLEX FUEL E85 for 5.9l 1990 ??
many thanks

 

You would need a PCM that knew how to deal with the fuel. So far as I know, nothing like that exists for the older trucks.

 

As far as I know, nothing made before 2003 can use flex fuel...Mr HeyYou above is right on and also your fuel system doesn't have the correct lines for all the alcohol.

So E10 is the best you can do...you cannot even to E15 because of the lines...

 

E-85 vehicles have been around since the early 1990's. The fuel components do need to be alcohol resistant. New hoses you get are, older ones, like through this truck, aren't. I don't see the advantage of E-85 myself. It has less power per gallon so fuel mileage, even on a flax fuel vehicle, is less. Ethanol in gasoline is more of a political thing than practical. The farmers love it but the oil companies can't sell as much oil because of it. Henry Ford designed the engine in his model T of 1909 to run on alcohol as it was more available back then. Gasoline is now easier to get and has a denser energy quotient. more bang for the buck you might say.

 

the only real advantage for flex fuel imho is for forced injection... and then you have to build for it. just don't with respect to putting it in any other vehicle not specifically designed for it... ;-)

 

Thanks all !

For now I test with 50% ethanol and 50% gasoline and everything is great
I am in France and the cost per liter is over 2 times cheaper

 

Oh, now it makes sense. I was assuming you were in the U.S. with our political games. Keep an eye on your filters and if you start to see pieces of broken down rubber, change them and look for the failing part. Especially the rubber on the fuel line from the tank to the engine. If that one fails, you'll be spraying gasoline and a spark can cause an explosion.