2013 GT very annoying to drive at low speed - Ford Mustang Forum
 
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post #1 of 12 (permalink) Old 04-21-2016 Thread Starter
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2013 GT very annoying to drive at low speed

Hi everyone,
Before I start my car is a 2013 GT/CS with 3.73 gears and it is a manual. It's has a Steeda tune on it and a CAI
I'm not sure if any of you have experience this but this has been driving me insane. My car is basically impossible to drive smooth under maybe 70km/h (45 miles). Every times I very slowly press on the accelerator it either accelerate or decelerate there is no way to keep a constant speed. Also the other problem is when the engine shut off the gas on compression to save gas there is a delay, both for the gas shut off and if I press back on the gas. Now before you say it's normal for a manual/high torque car or that I don't know how to drive manual I used to drive a 2005 GT for 4 years and have never experienced this. I also own a 2003 bmw XI which is manual as well and again no issue, same with my subaru STI 1998. The issue happens with and without my steeda tune.
Any idea what's going on?

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post #2 of 12 (permalink) Old 04-21-2016
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Possibly something with the tune. Have you tried bringing it back to stock and testing to see if the problem goes away? You may need to put the stock airbox back on it if you return to stock.


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post #3 of 12 (permalink) Old 04-21-2016
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Talk to Steeda about the tune. It sounds like the throttle resonse needs some tweaking.


Also might be worth a try to clean the throttle body, and the MAF sensor while you're at it.

| 2010 GT coupe | Daily Driver with some Steeda and GT500 take-off stuff for the occasional track day
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post #4 of 12 (permalink) Old 04-21-2016 Thread Starter
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As mentioned I have tried to return to stock and i'm having the same issue. I also put back the stock airbox when I did that, I have checked the throttle body and there isn't any gunk it's spotless clean. I didn't try to clean the MAF sensor, I guess it's worth the try.
Other things I have tried so far:
Throttle reset procedure
Unplug the battery
Reset the KAM setting with the tuner
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post #5 of 12 (permalink) Old 04-22-2016
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It is a combination of aggressive throttle response (tuning) and your 3.73's. How many miles on car? Use some QD electric cleaner on maf sensor to start.
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post #6 of 12 (permalink) Old 04-22-2016
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It does not sound "normal" to me. I know my 2010 is not like that and I cannot imagine all the 2013's are like that.


Maybe something wrong with the throttle body / controls?

| 2010 GT coupe | Daily Driver with some Steeda and GT500 take-off stuff for the occasional track day
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post #7 of 12 (permalink) Old 04-22-2016
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If you have a burnt up oxygen sensor, it can run super rough too.

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post #8 of 12 (permalink) Old 04-22-2016
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This is most likely a combination of the tune and the 3.73s. A lot of the less aggressive tunes like to ramp up the throttle response to make the car feel a lot faster than it is. Even a stock 3.73 car can be a bit jumpy at low speeds and low throttle. My lund tune has a very smooth linear pedal map and I still have trouble keeping the car from getting jumpy in traffic sometimes.
See if Steeda will send you a revised tune with a less aggressive pedal.
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post #9 of 12 (permalink) Old 04-22-2016
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OP if you have this problem with the stock tune / airbox, I would clean the MAF sensor. If that doesn't help, perhaps you should take it to a good shop. It could be a sensor issue, but I'm wondering why no CEL. Have you checked for stored codes?


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post #10 of 12 (permalink) Old 04-22-2016 Thread Starter
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To answer previous questions my car has 35 000km which is 22 000miles. Like I said earlier it does this as well with the stock tune/airbox. Thanks for suggesting to clean the MAF sensor I will definitely try that out when i'm back home. Also no codes.
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post #11 of 12 (permalink) Old 05-13-2016 Thread Starter
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Just to update I took the whole throttle body off the car and cleaned it better. It improved drastically the drivability at low speed however it isn't quite there yet... at least it'S drivable now
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I still say contact steeda. Tuned car + drivability problems = call tuner
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