Hi guy's well went to replace the cap and rotor on my 2002 blazer,
What an afternoon cap didn't fit but rotor did, started truck getting random
misfire , brother in law after putting rotor on lifted and turned it could this be the reason for the misfire? didn't have it when I went to his place..
Put old cap and rotor back on still code 300 random misfire ,any idea's on this?

 

Normal for the rotor to pull up ~1/4" and turn. These things are real fussy when it comes to tune up parts. Use AC Delco only, D328A cap and D465 rotor. Aftermarket stuff doesn't last, and sometimes it doesn't work right out of the box... save your money.

 

good advice thanks am going to test the wires tomorrow and have a look at the plugs,
I know the plugs are fairly new but ya never know

 

It's easy to get the cap on just slightly wrong. Be sure that the cap fits exactly perfectly and that the bolt holes line up exactly. I've made that mistake in the past.

 

well update changed the plugs today seems a little better but still getting code p0300
will do the wire soon But the weird thing is didn't have any misfire before attempting cap and rotor

 

well through the ac delco wires distributor cap and rotor in the Blazer today and voila
everything is good again, guess it is only Ac Delco parts for this baby lol

 

These things are real fussy when it comes to tune up parts, (plugs, wires, cap & rotor). Glad you got her going, thanks for posting back