2003 Mustang GT Lack of power - Ford Mustang Forum
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post #1 of 19 (permalink) Old 08-30-2010 Thread Starter
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Hello All! Just got a 2003 Mustang GT 4.6L 5 speed on Saturday (August 28) and my passenger side window will not go up. Anyone around Sapulpa, OK wanna tinker with it? Otherwise, I'm going to have to sit at a repair shop all day. Ugh!
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post #2 of 19 (permalink) Old 08-31-2010
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post #3 of 19 (permalink) Old 08-31-2010
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post #4 of 19 (permalink) Old 08-31-2010 Thread Starter
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Question 2003 Mustang GT Lack of power

Ok, I have a 'chick' question. You know how you're driving and push the petal to the metal and the passing gear kicks in? That feeling of baby NOS and you're like "Woah there." My stang doesn't do it. Why not? Yes, she's all stock. And do I need to run the highest octane fuel?
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post #5 of 19 (permalink) Old 08-31-2010
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Im assuming its an automatic. If the revs go up (confirming that it downshifts) but you still have no power you may have a problem, but from that information alone it could be almost anything.

And no, you dont need to run higher octane. Contrary to popular belief, higher octane fuel does not have more energy. More power is obtained from higher octane fuel because the engine can be pushed more before it knocks, not because the actual energy in the fuel. You can try to put higher octane fuel and if it runs better or you notice certain noises go away, somethings wrong with the engine. If running higher octane fixes any problems, it is only a band aid fix and you should get it checked out.
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post #6 of 19 (permalink) Old 08-31-2010 Thread Starter
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It's a 5 speed manual. Sorry. I previously had a 2002 Impala and I'm used to that 'kick in' when I floor it. Just got the Stang Saturday so probably need to have a mechanic just give her a general look over.
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post #7 of 19 (permalink) Old 08-31-2010
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yeah it might need a slight tune up, that's probably all

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post #8 of 19 (permalink) Old 09-01-2010
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Then i dont understand what you mean by "passing gear kicks in." If its a 5 speed, you have to select the gear

You wont feel the same thing in a manual flooring it at 40 MPH in 3rd gear as you will in an automatic because the manual will be at roughly 2000 RPM while the auto will shift to 2nd and be at 4000ish, which has a lot more power available. Im still not sure if I understand what youre trying to say, though.

Either way, if you car hasnt had a tune up in a while it wouldnt be a bad idea.
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post #9 of 19 (permalink) Old 09-01-2010
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When you floor it in an automatic, the transmission automatically downshifts to a lower gear. That's why you feel the power come on.

When you floor it in a manual, you're still in the same gear that you were just in. If you want the car to downshift, you have to actually do it yourself. Hence the term "manual" because it's manually activated.

So in other words, there's nothing wrong with your car. You just need to learn how to drive the manual transmission. You'll get the hang of it and get it figured out in no time

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post #10 of 19 (permalink) Old 09-01-2010 Thread Starter
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I told you all it was a chick question! ha! I guess the whole "manual" transmission thing is literal. Makes sense now though. Thank you all.
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Haha no problem with questions. Just wait until you get so used to the clutch, then you will start trying to shift automatic cars. I do it all the time in my dad's truck and my mom's car. Takes me a few minutes to remember there's no clutch

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Welcome to AFM! and all questions are welcome here.

You'll especially notice a sluggish feel if you're in 5th at highway speeds and try to floor it. Try dropping down to 4th and see what happens when you mash the gas. After a while you'll start to get a feel for the "sweet spots" and you can drop gears for some quick acceleration. We don't know the history of your car but it still wouldn't be a bad idea to do a tuneup and check it over for any obvious problems.

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post #13 of 19 (permalink) Old 09-01-2010 Thread Starter
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Thank you! I'll give the down shift a try. Still kill her in reverse so getting used to her still. It had sat for a while but I'm not sure how long. Might just need some cobwebs burnt off at about 120MPH.
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Just saw the pics in your gallery... beautiful stang!
post #15 of 19 (permalink) Old 09-01-2010 Thread Starter
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Thank you Snackmaster! My first Stang so I'm pretty proud of her! :kooky:
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