Saturday, December 15th, 2012 AT 4:17 PM
I am backing my 69 camaro w a 454 out the garage and all of a sudden a loud knocking/ back firing( maybe) that shakes the whole motor starts and does not stop. The car only has about 3000 miles sinse it was completely restored. It has been sitting in a garage for about a month. It drove perfect when last driven w/ No problems. Any help would be much appreciated!