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I have a 95 gt with a 331 and my check engine light comes on after about a minute then disappears when you shut it off so you can't check the codes. My guess is the 02 sensors since I have them placed in the long tube headers.... Any ideas?
 

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Georgia331 said:
I have a 95 gt with a 331 and my check engine light comes on after about a minute then disappears when you shut it off so you can't check the codes. My guess is the 02 sensors since I have them placed in the long tube headers.... Any ideas?
Ya that's probably what it is. Mine is on when I hit the gas because I don't have cats
 

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My check engine light comes on about 4 or 5 minutes after its been running. It's the o/r x pipe that's causing it on my car.
 

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Slow5.0 said:
My check engine light comes on about 4 or 5 minutes after its been running. It's the o/r x pipe that's causing it on my car.
Awesome that makes me feel a lot better lol. I had an offload H and "converted" it to catted so that makes sense
 
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