please help me ! my DB8sir lost power........

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gtimax

New Member
my DB8sir lost power when engine get hot, it is very powerful when I begin to drive it (engine just warm) but after 10 mins. in town drive slowly, it start to lost torque at low rpm the engine response slow, over 5000 rpm the power come back with vtec.
(the engine was rebuilt last week, installed R cam, K4 piston, ecu is stock)
run engine for 500km, just changed engine oil
please help me ! thanks a lot!
 
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