I recently bought an 89 toyota pickup from some kid in RI. I bought it knowing that it ran rough but I had no idea what I was getting into. It a 5 speed 6cyl with 189,000.The problem is that the truck is running super rich. I went through about 3 gals of gas in a 5 mile trip! Black smoke out the tail pipe painting the ground. The kid who I bought it from went through all the hoops of figuring it out. Changed cold start, egr, plugs,wires,o2 sensors,air box. the whole shibang. Im not getting a check engine light. I had it run on a computer and it couldnt diagnose the problem. Leaky fuel injectors. So, now it has 6 new injectors. Dont know what to do. Im at a loss for ideas. Oh and I called toyota on the head gasket recall. No luck! Said there is no recall on my truck. Please, any help would be appreciated.