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need help i have a mustang gt 1989 i have to accelerate to stay about 1 minute without turning off but he took me everywhere... someone told me that was sparks plugs i change it the problems still there. Can be the headers? please heeelp
 

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LOL I assume you mean you have to step on the throttle for about 1 minute for the car to idle correctly? Run the KOER self tests. See if you get any codes. Also you can check the TPS to have .98 volts at idle.
 
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