i have a 1995 formula m6 lt's borla 160 stat i just changed the plugs and wires. i have a question she stays at 220 even with the ac on and idleing also when i hit the gas when it is this hot i notice a slight stumple not really a miss well maybe a little miss opti? egr? anyone else have this issue and is this the right temp and will a tune turning the fans on at 160 help the temp issue?