2005 3v 5.4 Misfire Problem
#1
2005 3v 5.4 Misfire Problem
Read latest forums, Start and idle good motor smooth and quiet, changed plugs and coil packs, check engine code misfire #4! Runs good until load then runs rough and lag in acceleration!!! Reset Codes same problem changed coil and plug from different cylinder, that are new, no change??
#2
Did you have the misfire before changing plugs and coil packs? What brand of plugs and coil packs did you use? Any other codes? An injector can cause a misfire too. And be aware that the 2005s got a batch of bad injectors. I'd put a couple of bottles of tehcron or gumout with PEA in the gas and run it through.
#3
Some misfire earlier on other plugs so changed coils and plugs! Was fine then started this after a little while, ran seafoam thru it too and reset still does it!! Run Accel coils and MGK plus with no problems for at least 20,000 miles!!!
Last edited by Ponyboy1071; 12-04-2017 at 11:11 AM.
#5