1991 Chevrolet Silverado 1500 4x4 5.7

[Juan Aguayo]

I have a 91 Silverado that i stopped using a while ago because i couldnt figure out what was wrong with it. Everything was working fine till one day i changed the spark plugs and i connected the cables back and 2 of them were connected to the wrong one. and i used it like that without realizing it was wrong. I then changed them back to the way the are supposed to go. It now runs without a lot of power, and after a while of being on it starts to idle slow and misfires. What could be Wrong with it?

 

[Gramps]

First thing is to check your firing order. Again. Me I’d pull the wires off the plugs and start from #1 plug and wire. 1-8-4-3-6-5-7-2 is the firing order. Should be cast into the intake if it’s stock.

 

[ram1220]

In addition to the firing order check and make sure that the wires are securely snapped onto the plugs. I recently bought a set of AC Delco wires and I had a hell of a time getting them to snap onto the plugs as well as the distributor. I had to use much more force than I have with house brands. I finally got the wires on and the truck runs great.