Negative timing corrections

[rcnut14]

Hey! So my FiST is basically stock with a Cobb stage 1 tune in it I just did last night. I’m seeing pretty big negative timing corrections, is this normal especially for a new tune? If give it modest but quick gas (to like 3k) all 4 cylinders will cut timing

sorry I’m new to tuning and the AP

http://imgur.com/a/ZfjJkZr

View: https://imgur.com/a/ZfjJkZr

 

[TyphoonFiST]

Hey! So my FiST is basically stock with a Cobb stage 1 tune in it I just did last night. I’m seeing pretty big negative timing corrections, is this normal especially for a new tune? If give it modest but quick gas (to like 3k) all 4 cylinders will cut timing

sorry I’m new to tuning and the AP

http://imgur.com/a/ZfjJkZr

View: https://imgur.com/a/ZfjJkZr

Whats your Octane Adjustment Ratio/OAR/ Is it -1.00? If not you may have poopy gas. Also is the AP3/ Accessport been updated lately?

 

[rcnut14]

Hmm, maybe that’s it. No it’s sitting at -0.67

i flashed the stage 0 tune and OAR was sitting at +0.6 and my timing during pulls seemed almost all positive.

so would that prolly be gas then?

 

[TyphoonFiST]

It needs to be at -1.00..Dont be getting on it/accelerating if its not* Do you have access to e85? If so..go put in 1 gallon of e85 and see if hat raises the OAR to -1.00*

 

[rcnut14]

iIdo not have access to e85. even on stock tune it should be at -1.00?

I'm at a little under half a tank so ill try a different gas here in a day or two

 

[haste]

What octane fuel are you putting in the car when you fill up?

 

[dhminer]

iIdo not have access to e85. even on stock tune it should be at -1.00?

I'm at a little under half a tank so ill try a different gas here in a day or two

Yes always at -1.0 OAR. Idk if there are multiple OARs or not but you want the OAR learned parameter. Giving it some gas around 3k rpm in a high gear multiple times will get the car to learn. Slightly uphill makes it even easier. Like typhoon said if it’s not -1.0 that’s a sign of bad gas and you should go easy on it. Running 87 on stock map won’t damage anything as Ford tuned it pretty intelligently, but should always run 93 if you want to drive it hard at all. After all more knock is never a good thing.

 

[rcnut14]

ok sounds good. yea it SHOULD be 93 but I will admit I didn't fill up at my normal station ( was up in town and needed gas so I went to the nearest station without even thinking about it) and this is the first tank of gas I've had in the car.

I've flashed it back to stock and it's not reading negative 1, and going easy on the throttle it hasn't given my negative corrections. so I'll put good gas in it here in a few days when it's lower and report back.

 

[M-Sport fan]

iIdo not have access to e85. even on stock tune it should be at -1.00?

I'm at a little under half a tank so ill try a different gas here in a day or two

Don't at least some of the Sheetz stations out there carry E85??

 

[rcnut14]

Don't at least some of the Sheetz stations out there carry E85??

one does about 25 minutes from me, so it's not really practical to fill up there every week ( I burn close to a tank a week)

 

[FiestaSTdude]

one does about 25 minutes from me, so it's not really practical to fill up there every week ( I burn close to a tank a week)

Even if you don't use it every time, it would be interesting to try a gallon of e85 in the tank and see if it helps. At least you'd know it was a fuel quality issue.

 

[rcnut14]

so update, I put a full tank of 93 from the station I know is good and it's doing much better. OAR is -1.00 and I'm getting pretty much only positive corrections (occasional knock but not often and it's not about -1.5 correction)

Thanks everyone! I've since put the stage 1 back on and no issues