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5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

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Old 06-25-2011, 10:53 PM   #1
94-convert-gt
 
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Vehicle: 1994 mustang Gt
Location: MO
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Default bad throttle position sensor?

i bought a 94 mustang gt (5.0) BONE STOCK NOTHING AFTERMARKET. it had a bad transmission (aode) no third gear needed to be rebuilt. so i swaped out for one i found on craigslist for 100.00 bucks with a torq convertor off a v6 3.8 i read it has been done many times sucessfully. i went through it as much as i could flushed everthing new fluid filter seals ect. it works great except when i get on it a little. at 60+% throttle it stops accelerating and hangs on to one position of rpms. like 2,000 rpms or sometimes 2500 rpms, and when it does this it will flutter just a little. if i let of the throttle and get back on it a little it will backfire and the act normal again. i thought it might be a throttle position sensor. but that doesnt add up 100% in my mind. also it will throw up a check engine light so i try to pull over real fast to check it on my code reader but it goes off before i get to it every time. it only stays on for like 5seconds. what chould it be? it will acellerate gradualy great. but all at once it wont do it. i have noticed that it is much more sensitive to doing this when it has been driven steadily for awhile.

thanks for reading any advise is very helpfull i'm stumped.
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Old 06-26-2011, 05:26 AM   #2
AdderMk2
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remove one or both of your O2 sensors from the midpipe. take the car out for a drive and see it it has significantly better acceleration.

this will tell you if you've got bad cats.

Solution: Replace midpipe
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Old 06-26-2011, 10:32 AM   #3
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Quote:
Originally Posted by AdderMk2 View Post
remove one or both of your O2 sensors from the midpipe. take the car out for a drive and see it it has significantly better acceleration.

this will tell you if you've got bad cats.

Solution: Replace midpipe
i cut the cats off and cashed them in. i replaced it and reused the H pipe. it ran the same way with the cats as it does now without the cats just a little louder. not a bad idea.
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Old 06-26-2011, 11:27 AM   #4
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Quote:
Originally Posted by 94-convert-gt View Post
i bought a 94 mustang gt (5.0) BONE STOCK NOTHING AFTERMARKET.
Quote:
Originally Posted by 94-convert-gt View Post
i cut the cats off and cashed them in. i replaced it and reused the H pipe. it ran the same way with the cats as it does now without the cats just a little louder. not a bad idea.

You are a liar, and without accurate information, we cant help you
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Old 06-27-2011, 04:45 PM   #5
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Quote:
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You are a liar, and without accurate information, we cant help you
LIAR? bone stock to me means added nothing aftermarket nor swaped out anything for aftermarket. that is without exception the only thing i have done. it of course does not have rear o2 sensors thats why i did it. the car dont now i did it. and it did the same without the cats as it did with the cats. i'm sorry i didnt honestly think that counted.
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Old 06-27-2011, 11:23 PM   #6
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Quote:
Originally Posted by 94-convert-gt View Post
LIAR? bone stock to me means added nothing aftermarket nor swaped out anything for aftermarket. that is without exception the only thing i have done. it of course does not have rear o2 sensors thats why i did it. the car dont now i did it. and it did the same without the cats as it did with the cats. i'm sorry i didnt honestly think that counted.
it never had rear O2 sensors to begin with... Are you sure you have any at all?
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Old 06-28-2011, 09:05 AM   #7
txjason1
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no 94 or 95 GT EVER had rear o2 sensors. only has 2 upstream. And dont let autozone tell you there are 2 different. They are both same part # no left or right.
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Old 06-28-2011, 09:05 AM
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