BlackLX_92

my 5.0 isnt fireing on #6 or 8 it has compression and spark do you think its not getting enough spark??i have a new carb distributor cap and rotor and spark plugs on the way do yall think this might fix my prob??

ZachW04Stang

How do you know its not firing on 6 and 8?

BlackLX_92

Simple I pulled the plug wire off of all of them one at a time and they were the only ones that didnt effected the sound of the engine

Boss_Hotrod

Check the firing order and the plugs. Another thing to check will be the cap.

ZachW04Stang

Start basic, check the cap, plugs, and wires first. I also see you have msd. It could be a problem with the box itself.

Gary H

Make sure the wires are good, and that they seated in the cap and on the plug. Spark plugs are easy to check, just swap one in from a cylinder that is firing.

Bullitt94

It wouldn't hurt to check the compression on those two cylinders if the new stuff doesn't help.

ih8chevy

I had the same problem last week, my number 6 cylinder I believe was missing really bad, and I had just put new plugs in last month so i checked the wires and low and behold the wire was on the header which burnt right through it. So check the wires and plugs.