I just replaced my spark plugs, the old ones were really bad. Center electrodes all worn down.

Anyways, I replaced the spark plugs with autolite #69s (put dialectric grease in the boot of the spark plug wires), topped off the antifreeze, changed the engine oil with semi synthetic valvoline.

Now I have what I can best explain as a idle ad just off idle miss. misses up to about 1500rpm then is fine.

Did I do something wrong?

Help please and thanks in advance.

 

crappy plugs and also they may not be gapped correctly

 

ok, try ngk's ???

 

I totally agree autolights are crap, get ngk's and be done w/ it.