Dear Ferraristi, I have a question on a Fuel injection matter. I have an 80 308 that I think is having a rich conditon. I get about 5 miles per gallon and I have to put a large bottle on Cheveron Techtron in every tank. If I don't, I get hesitation, missing, spitting, poping, back firing. As soon as I put the Techtron, smooooth as silk. I don't believe it is spark related, because as soon as the techtron is added to a fresh tank of fuel...perfect. Is there a proceedure for diognosing ( sorry no spell check ) this. I don't think I can do this myself but would like to point to some likely candidates for the shop. If is a question of some simple parts replacements, all your input would be greatly appreciated.