E85 filling

[99 gst spyder]

I'm converting from 93 to E85. I was told I could take the plug from the bottom of the gas tank and drain it that way. I had let my car ran until it is completely out of gas in the tank and couldn't start back up.

Would I still have to unplug the tank plug and drain it even though I let the car ran completely out of gas, or can I just fill it with E85? Or is there any other suggestion before going E85?

Note: "I'm getting ready for the dyno/tuning session".

 

[SonySlave]

I'm converting from 93 to E85. I was told I could take the plug from the bottom of the gas tank and drain it that way. I had let my car ran until it is completely out of gas in the tank and couldn't start back up.

Would I still have to unplug the tank plug and drain it even though I let the car ran completely out of gas, or can I just fill it with E85? Or is there any other suggestion before going E85?

Note: "I'm getting ready for the dyno/tuning session".

Running the motor til it dies is only going to get as much fuel as the pump can grab so it will leave some at the bottom of the tank. On a 1G it's super easy to just pull the plug on the tank real quick to drain what's left. The first tank or two you'll need to keep an eye on your AFRs and tune just because any residual pump gas could taint the E85 so it could go lean out of nowhere once all of the pump gas is gone (Ask me how I know. Haha!). Won't take long though. Also, just keep a couple new fuel filters handy and change it out every 500-1000 miles or so as the E85 will start to break down all of the junk in your tank and start accumulating in your filter. Shouldn't need to do it more than once or twice unless you notice an issue.

 

[99 gst spyder]

Thanks alot sonyslave. Will do.

 

[4g63t]

I would not worry about it that much. I have a duel map set up and i switch it back and forth throughout the summer. (91oct and e85) I can drive up to the pump with my 91 tune and switch it at the pump. Car always starts up fine and i have no issues with left over 91. I drive it down to the low fuel light and pump 10 gal in. I have never drained the tank.

 

[jof_03]

can you do dual maps on v3 link?

 

[keithcfisher29]

Yes you can

 

[DSM1G90]

Plan on changing fuel filters on a regular basis since that much alcohol, being corrosive, will loosen up everything in the tank and bring it to the filter and beginning to clog it up.

 

[clipto]

When I switched to e85 I just let it run out of gas by disconnecting the fuel pump and pumping the extra out. You can drain the gas if you want but I don't think there will be to big ill effect if there is a tiny bit in there. A full tank of E85 will take over the gas properties.

 

[99 gst spyder]

Okay, so today I fill the tank with 5 gallon of E85. It started right up but kind of sputter for about 10 seconds then dies. I started it right back up and was okay for a bit but I can tell the idling was kinda off.

Wideband was lean at first around 16-16.5 at idle, airflowperrev, and combfuel trim was off, Airflowperrev was around 27-29, combfueltrim was around -11, so I set global to -35 and deadtime to -250ish and it Idle a lot better plus messing around with the fuel trim.

I want to verify on idle adjustment. I got my airflowperrev at .25ish, my combinefueltrim at closest to 0-1 right? According to the ecmlink.com videos. Idles great.

Any other things I need to adjust or out of wack?

One log is cruise and the other is idling.

Thanks.

 

[DSM1G90]

Your O2 Sensor doesn't like the added alcohol causing a different oxygen level. Be a while until the ECU gets remapped with the stuff the O2 sensor is smelling.

Your performance (and gas mileage) will be less due to the less BTU that the fuel will put out even though the octane level jumps up 12 points above the premium fuel level.

 

[clipto]

Pm my1gdsm he does remote tunes for a good price, and is great with e85 tunes.