I have a 1991 Hb 4 cylinder (KA24). The truck has been running fine until Monday evening I ran into the grocery store for 10 minutes.The truck would turn over ,but would not start. Cheked to make sure the truck was firing(OK),checked for fuel(OK),smelled gas really strong.After about 20 minutes the truck finally started ,but it was pouring black smoke from tailpipe.I have checked the codes and got a 13 Engine temp. sensor. Will the engine temp sensor make the timing move around 10 to 15 degrees? Do you just replace the engine temp sensor? Any other ideas!! Thanks