Questions and Answers

Chevrolet C20 Has High Hydrocarbons Q. This pickup truck is failing to pass the hydrocarbon portion of an emission test. What is the possible cause and solution to this issue? 1984 Chevrolet C20 Pickup Truck 305 CID engine Automatic transmission 78,000 miles Carburetor Non-ABS brakes P/S Thank you, Jason

A. Without seeing the printout of your test results, you will need to address the state of tune of this truck. Does it run okay? It could be a weak spark from coil, timing issue, mis-adjusted carburetor. Fixing one or all of these areas could also make it fail in another gas as well.