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Old 08-05-2007, 06:46 PM   #1
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Problems with 1991 Mustang GT

My 1991 Mustang GT spudders, and hesitates when I start it up and while Im driving. It will sometimes die on my and I let it sit for 15 mins and it will fire right back up like nothing happened. It doesn't happen everytime through. It can run for weeks and not mess up then the next day it can be acting up. Im not sure what is wrong and the guy that works on my car can't figure it out. I took to Ford and they couldn't find anyting wrong with the car. Can anyone help me?
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Old 08-05-2007, 07:12 PM   #2
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Re: Problems with 1991 Mustang GT

I would check/replace the following

plugs (gaped right)
plug wires
rotor/cap for distributor
fuel filter

also clean your maf and check/clean air filter
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Old 08-05-2007, 07:32 PM   #3
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Re: Problems with 1991 Mustang GT

Thanks I changed the wires and plugs but not the other stuff.
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Old 08-05-2007, 08:36 PM   #4
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Re: Problems with 1991 Mustang GT

Clean out the tps as well.
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Old 08-05-2007, 09:07 PM   #5
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Re: Problems with 1991 Mustang GT

What is the TPS?
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Old 08-05-2007, 09:29 PM   #6
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Re: Problems with 1991 Mustang GT

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Originally Posted by wmsoccer28 View Post
What is the TPS?


yeeeaahhh... im gonna have to get you a copy of that memo.
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Old 08-06-2007, 04:06 AM   #7
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Re: Problems with 1991 Mustang GT

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What is the TPS?
The tps is the throttle position sensor
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Old 08-06-2007, 09:53 AM   #8
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Re: Problems with 1991 Mustang GT

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Originally Posted by SpectorV View Post
I would check/replace the following

plugs (gaped right)
plug wires
rotor/cap for distributor
fuel filter

also clean your maf and check/clean air filter
Id also replace your coil, maybe run some seafoam through the car, and put a mechanical guage on your fuel pressure to make sure your fuel pump isnt weak
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Old 08-06-2007, 12:05 PM   #9
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Re: Problems with 1991 Mustang GT

I had a fuel pressure gauge on it came back good
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Old 08-14-2007, 12:15 PM   #10
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Re: Problems with 1991 Mustang GT

Sounds to me like your fuel pump is getting too hot for some reason. Have u changed it or is it still the original? If its the original i would change it.:burnout:
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Old 08-20-2007, 10:48 PM   #11
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Re: Problems with 1991 Mustang GT

check your mass air
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