Okay so I have 3 new coil packs and 4 new spark plugs on my 2000 VW new beetle 1.8 turbo GLX. I will be getting the 4th coil pack next pay day. Anyway, it misfires under heavy acceleration. I've scanned it with a bosch scan tool and I've done the live time. It says my coolant temperature is -40 and never changes. I've changed coolant temperature sensor twice in 2 weeks. I don't know what else to do. Thoughts? Thanks in advance.