96 gt hesitation under load - Mustang Evolution

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Old 06-30-2014, 09:02 PM   #1
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96 gt hesitation under load

96 gt hesitates under load. First noticed it 5th gear now it does it in 4th also. It's worse as the daytime temperature goes up. It was throwing o2 sensor codes and insufficient egr flow codes. Replaced the egr with a used thoroughly cleaned egr and it didn't help. Found a blown gasket on passenger side between exhaust manifold and exhaust pipe. Replaced that. Seemed to run great for a few days. Now it's worse than ever. Pulled the codes , same codes are back. It has a cai and a Mac offroad h-pipe with Pypes exhaust.
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Old 07-01-2014, 02:53 PM   #2
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Did you try replacing the o2 sensors. Bad o2s can mess with your fuel trims and that can cause hesitation under load

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