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BigB227 said:
Rough idle and poor acceleration
My car was tested at Autozone said it's an egr issue idles...ok but accelerates horribly unless at 1/2-3/4 throttle
 

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Does it have an aftermarket cold air induction? Just curious because i had the problem for months and it ended up being the induction switch it back and havent had the problem since! Just a suggestion!
 

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edgar_32 said:
Yeah i doo, soo that can be causing the problem?
Yep its very possible! What kind of cai do you have? I got mine off ebay cuz it was cheap n i jus wanted to try it and see what it was about!
 

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BigB227 said:
Rough idle and poor acceleration
Not necessarily, it could be stuck closed. Then in that case it would be terrible mpg's.
 

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86 muscle said:
Is there a way to check an egr valve? If so how? My Stang runs pretty rough at times and gets bad mileage
Yeah one way to see if it's stuck open is to disconnect the vacuum line at idle and it runs better its stuck open.
 
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