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2005-2010 Mustang GT Tech Forum

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Unread 06-29-2008   #1 (permalink)
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Default 2007 Mustang GT with hesitation problem

My 07 GT seems to have a split second hesitation in 2nd -4th gear. It seems to be worse when the a/c is on. When crusing if I engage the clutch and hit the accelator there is this hesitation before it responds. I use 89 octane gas. The only install I have is a K&N cold air intake and flowmaster axle back exhaust. Unless I reve the car before I drop the clutch when the car is standing still it doesn't burn off the line. I traded in a 2004 mach 1 for this gt and never had this problem
I read that with a retune to premium gas the condition improves.
Any suggestions.
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Unread 06-30-2008   #2 (permalink)
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This may be a stupid question but do you turn off the TCS when you try to burn the tires?
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Unread 06-30-2008   #3 (permalink)
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I also noticed this. I think it's just a bad bad bad lag in the drive by wire config. I bet pretty much any tuning out there (BrenSpeed, Bama etc.) takes care of this. However, I haven't been able to prove that to myself yet. I just dislike it as it makes for clutchless shifting even more difficult that it needs to be. That and when shifting to slow down (5-4-3-2-1) it never seems to actually "lay off" the whole way, until about 2-2.5K RPMs.
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Unread 06-30-2008   #4 (permalink)
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A BamaChips tune will get rid of the hesitation. It did the trick for my 05 GT.
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Unread 06-30-2008   #5 (permalink)
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I believe you are experiencing throttle lag from the drive by wire system. As was mentioned a good tune would help eliminate that.
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Unread 06-30-2008   #6 (permalink)
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A tune will help but it's nearly impossible to get rid of it entirely. What I would do for a throttle cable!
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Unread 06-30-2008   #7 (permalink)
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Quote:
Originally Posted by stlwagon View Post
A tune will help but it's nearly impossible to get rid of it entirely. What I would do for a throttle cable!
Geeze, so there's no way to get rid of it 100%? That's very disappointing. I've always heard how "responsive" and "perfect" drive-by-wire was, and that it had (somehow) LESS lag than a throttle cable (which, I don't see how that's even physically possible). I'm sure with anything else there's variance on it, but dang, I just want it to go when I push the go button, and not go when I don't! Is that so hard?
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Unread 07-01-2008   #8 (permalink)
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Quote:
Originally Posted by RayS View Post
Geeze, so there's no way to get rid of it 100%? That's very disappointing. I've always heard how "responsive" and "perfect" drive-by-wire was, and that it had (somehow) LESS lag than a throttle cable (which, I don't see how that's even physically possible). I'm sure with anything else there's variance on it, but dang, I just want it to go when I push the go button, and not go when I don't! Is that so hard?
No way...a throttle cable IS instant response. Drive by wire sucks, and I don't know why we still use it. Should go back to a throttle cable. I always thought it was cool to be able to rev the engine from the bay.
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Unread 07-01-2008   #9 (permalink)
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Quote:
Originally Posted by tw0scoops123 View Post
No way...a throttle cable IS instant response. Drive by wire sucks, and I don't know why we still use it. Should go back to a throttle cable. I always thought it was cool to be able to rev the engine from the bay.
I personally like on carb'd engines with 4 barrels cracking the throttle to wide open and watching the gas just POUR down through the secondaries.
I don't see how anything can be faster than a throttle cable, personally. Unless you somehow have a throttle cable that's loose and has play before engaging or something?
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