multiple misfire

[smagma]

02 2500HD 6L has code p0300 multiple cylinder misfire
cyl's 5 and 6 are the worse the other cylinders have just a few hits
the wierd thing is the problem will come and go, does not matter if its hot and cold
fuel pressure is good, had motorvac done to clean fuel rails and injectors
coils, wires, plugs have been swapped with no change
I was thinking the problem might be in the computer
anyone have any suggestions?

[sandy0225]

My hubby is having the same thing with his 2000 silverado v6. just happened suddenly one day, when we figure it out, I'll let you know. it reads random multiple misfires. Good luck!

[Jeremy-WI]

On the V6 change the distributor cap and rotor, try one with brass contacts

[Faze2183]

go with accel products

www.mrgasket.com