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Discussion Starter #1
M just curious to see who has an auto and who is it tuned by and if there has been any problems. My problem comes when just cruising around town or just leaving a stop light under light acceleration. Engine starts surging and drives me nuts. If I give it more gas it goes away but still embarrassing and aggravating.
 

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I have an auto GT tuned by Bama. I'd been driving with the Street tune on it, but just today decided to re-flash and put the Race tune on. No problems at all- except that it's improved my gas mileage so much it took forever to run out my tank of 87 gas so I could fill up with 93 and switch the tune :)
 

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Discussion Starter #5
I'm running a Bama tune. I currently have the 93 performance but it did the same with the race tune. I've talked to them and they are supposed to get back with me. Also been throwing P219A code. But I'm thinking I may have something loose somewhere. I'm going to try to get under the car tomorrow. I don't hear an exhaust leak but it may be a loose o2 sensor or something.
 

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Here is what ford says causes the p219a code. i just figured this would be useful information for anyone else who has this pop up.

p219a- Air Fuel Raito Imbalance Bank 1

Possible Causes Leaking or contaminated fuel injectors, Low fuel pressure, or running out of fuel, Leaking EVAP purge valve, Exhaust or intake air system leaks, Exhaust gas recirculation (EGR) system, Positive crankcase ventilation (PCV) system is leaking or the valve is stuck open, Ignition system, Incorrectly seated engine oil dipstick, tube or oil fill cap, Base engine concerns.


Do you have a cold air or Boss intake? If so check all connections. Is your tune done for a O/R X pipe? Being rear O2 sensors are turned off? I know some one else had this and they had a lose connection on there boss intake sensor.
 

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RVAStang05 said:
I have an auto GT tuned by Bama. I'd been driving with the Street tune on it, but just today decided to re-flash and put the Race tune on. No problems at all- except that it's improved my gas mileage so much it took forever to run out my tank of 87 gas so I could fill up with 93 and switch the tune :)
For some reason I've lost like 1-2mpg. I have a 2010 GT Auto with JLT CAI & tune
 

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What Octane gas are you running? Should be using the higher Octane gas in it especially after a Tune.
 

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Discussion Starter #9
I have the JLT, I've checked everything with that being connected and tight. I do have an o/r x and and yes it is tuned for it. I even data logged. They are writing me some new tunes but I my guess is something came loose on the exhaust. The new time is really just for the auto surging.
 

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KATO said:
What Octane gas are you running? Should be using the higher Octane gas in it especially after a Tune.
I use 91 octane which is the Highest level here in Cali were I live
 

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Us southerners have good ole 93 oct and still have gas stations that are non ethanol!
I think every state but CA still has 93 octane, but I might be wrong on that. All the gas stations around here do put ethanol in their fuel though. I suppose I don't mind as long as it's not damaging my fuel system.
 

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Discussion Starter #13
I got my new tunes but haven't tried them yet so we will see how they work. I also got a 4th gear lock dyno tune and I will be going do a few pulls tomorrow in baton rouge.
 

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Dbsaints said:
I got my new tunes but haven't tried them yet so we will see how they work. I also got a 4th gear lock dyno tune and I will be going do a few pulls tomorrow in baton rouge.
Hell yeah!! Wish I could go wit ya but the ole lady has my balls in her purse!lol will be one day behind u though! Makin a few pulls!
 

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Discussion Starter #15
I've thinking about it and I realize now I can't win. If I put down the numbers I think I will I'm just going to want more and if I put down less then I'm just going to be pissed lol. Can't win.
 

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JUST remember, MPH and MPG do not go together with each other. The more HP you try to make, the more MPGs go away. There is nothing wrong with wanting a litle more HP, but don't get in the mode of complaining about MPGs.:cool:
 

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Discussion Starter #18
This ain't my first rodeo lol. This is my 4th stang. I had a garage full of parts before I took delivery of the car.

---------- Post added at 10:02 AM ---------- Previous post was at 09:55 AM ----------

Dbsaints said:
This ain't my first rodeo lol. This is my 4th stang. I had a garage full of parts before I took delivery of the car.
This is my first auto and probably my last lol. If it was 100% drag car then it would be fine but it gets boring around town.
 

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Discussion Starter #19
So I go to do the dyno this morning. 4 hour round trip to find out that my new "dyno tune" won't stay in 4th. Wasted day and money. Thanks Bama.
 
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