Here's what we've done on the 4.9 1992 Cadillac engine. Map Sensor, Temp Sensor, Plugs, Plug wires, Throttle Sensor, Oxygen Sensor, Converter, Muffler (Blew it) - Can't read these, but looks like Cap, Buttons. Backfires about 6 miles - until it warms up I guess, and then runs good. Made appointment to get new muffler, but afraid to. What now? Thanks, Tom Callahan
Wednesday, November 22nd, 2017 AT 2:22 PM