my car has done this a few times now, heres what its doing, when i shift from a lower to higher gear at around 5 to 6k rpm it will shut everything down, cel comes one, wont shift past 3k, doesnt boost at all, and my access port shows no trouble codes?? but once it cools off it shifts fine but cel stays on, still no code, and once i cool off the second time cel is off and runns fine untill the next time? its done it like 4-5 times, any ideas?

i took it to gst and they said it has a vac/boost leak, could that be the cause? they also inquired that i should be running a fmic, car has roughly 320 to teh wheels, bigger turbo all required upgrades for it, exhaust, intake , big maf injectors ect.....

any ideas? could the boost leak be causeing it to do that? will a fmic fix the problem?

any help would be great thanks

 

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