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Wierd shifting at wot

cameron92

Grand Pricks
Just got my 2000 grand prix gtp with 160kms(canada). I did the homeade intake and went for a drive. I let it warm up and then i floored it from a stop all the way to 160. But when I was in second gear, the rpms stopped at 5500 for a good second and then continued up to 6000ish and shifted normally. Any ideas on what could cause this, im really hoping my tranny isnt going already :(
 


Ya it happens everytime, and I think the shift point is around 5700 with performance shift on. I just tried it with performance shift off and it shifted at 5500 without hesitation. Also I just had the engine light come on and it. is a o2 signal low bank 1 sensor 2, I have a leak in my exhaust so I think that may have caused that.
 


Cleared the code, it still does it(I think this is the most I've hit 160 lol) but I noticed I'm not getting full boost, I'm missing 1 lego block.
 
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