The AVCR on my car cannot function well, cant control the boost, any recommend shop to do the tunning?? Or just change to HKS EVC 5 will be better? yours suggestion is appreciate,thanks..
Hello guys!! My friend gave me an old school Greddy turbo timer recently. Can someone tell me what are the colours of the wires represent? There are 4 wires together:
1.Black : earth
2.Red : ??
3.White : ??
4.Green ...