my car is not starting. on 1996 Volkswagen Jetta

My jetta would not start.My electician is attributing it to the brain box is it possible.The fuel is over supplied and u will find some of it in the plugs whole.The colour on it is light blue and green.What does that mean

Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
1 answer
Bio-diesel.