Flex fuel tune vs emissions test

[Justgonna send it]

Is it possible to pass emissions test on ff tune or will I need to flash back to stock.

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[irvinnie]

E85 is a cleaner fuel than petrol (gasoline) so would make it easier to pass an emissions test

 

[Radar Doc]

It is possible, but depends on the changes made by your tuner, and other mods you have on your car. Do you have an OBD2 device to check the current state of your readiness monitors? If you flash back to stock, you will also need to complete a drive cycle to set the readiness monitors.

 

[Justgonna send it]

right now I’m running a ngauge. Idk if it checks ready codes or not

 

[engineermike]

@Radar Doc is right. Nothing about a flex tune inherently makes it fail emissions, but you may not be aware of other changes the tuner may have made that would affect it.

 

[Justgonna send it]

Ok I just tried and had o2 , o2 heater and catalyst not ready. So I guess I’m gonna flash back to stock and try again

 

[Grimreaper]

Ff/e85/93 all set the monitors with out issue when I was na

 

[Jackson1320]

This depends on your state any state with California smog test it will fail. automatically because it’s not a flex fuel vehicle. also the computers been modified

 

[Justgonna send it]

Well I’m in NC. My truck passed with tune no problem. So I think it’s just a ford thing. Im on 93 tune now so Im trying to drive the 300 miles and hope these 3 will reset. If not I will flash back to stock and Hopefully that will work.

 

[Zelek]

Flash back to stock if you can't get the tests to run.

 

[Justgonna send it]

Looks like that what I’m gonna do today. I ran all the e85 out and I have ran 100 miles on 93. So hopefully stock flash will do the trick. How many miles for the reset to take.

 

[Zelek]

If you haven't, get a cheap code scanner off amazon or use the torque app with a bluetooth OBDII adapter so you can see your monitors. The cats don't take too long to trigger but things like EGR can take longer.

 

[Justgonna send it]

I have Ngauge This is from few days ago

 

[Zelek]

I have Ngauge This is from few days ago

Fuel takes a little bit too and I believe requires more than 1/4 of a tank, but yeah you're going to have hell with the CAT and O2\HO2 without going to stock. Some people get lucky and some don't. I didn't see if you had long tubes or not.

 

[Justgonna send it]

Yea the fuel came on about 10 minutes in to the drive.

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