Worse mileage with gryphon on interstate

[bossman15]

So I should always open the custom options menu and make sure the tire and gear are set right? I tried to do this on the limiter to see what it was set as and it said there was an error and froze up. Same thing happened on the tire size...idk what the deal is but I had to unplug it and plug it back in to reboot

[Jackpine]

Bossman, unless you are running non-OEM tires or gears, program the PCM without trying to customize anything, at least at first. Get to know wht the new tune feels like. And, the Gryphon needs a non-customized tune to properly set up its stock files.

I don't know why you'd get the errors though when you tried to use the Custom Options menu but there are two possibilities:

1. It was cold when you tried to do this. The PCM and the Gryphon's electronics don't like extreme cold or heat.

2. The battery voltage was low. The Gryphon has to do a lot of work when it builds an "options" file and it needs healthy battery voltage. If you have a low Amp (about 2 Amps) trickle charger, it would be good to have it connected to the battery while you do ANY programming of the PCM to insure there's sufficient voltage. Also, make sure your accessories (A/C, radio, lights, etc.) are off.

- Jack

[bossman15]

Yeah I set everything up with no custom tuning for the first week I had the tuner...I actually have 305-55-20 bfg's which is a 2650mm circum.. The tuner had it set at 2356mm so that definatly had something to do with it. I changed that and also firmed each shift up by one...is that okay to move the firmness?

[88Racing]

Originally Posted by bossman15

Yeah I set everything up with no custom tuning for the first week I had the tuner...I actually have 305-55-20 bfg's which is a 2650mm circum.. The tuner had it set at 2356mm so that definatly had something to do with it. I changed that and also firmed each shift up by one...is that okay to move the firmness?

Yes its okay to adjust the firmness on a canned tune.
Its also okay to do on a custom tune BUT SMALLER INCREASES should be used. Usually Bill gets the firmness tuned to a good feeling shift.

[bossman15]

alright cool. man i cant even wait to see what bill's got in store for me...im sure ill be blown away.