Hey guys my names josh. Posted on here a few times and looking for some help. I have a misfire on cylinder 3. I work at AutoZone and have put my code reader on my 1999 Gtp it says misfire on cylinder number three. I changed plugs and wires twice too verify they aren't bad. I did get the ac delco iridiums that it calls for. I checked my fuel pressure about a week ago and its two pounds low. I have had this problem for a while now. It only misfires when I give it over half throttle. I changed the fpr as well thinking maybe the diaphram was bad. And got a new high flow cat from zzp as well. Still no luck. I'm not thinking fuel pump because its only misfiring on cylinder 3. Any suggestions?
Thanks for any input guys it will be greatly appreciated.
