Engine miss/vibration 5.4 3 valve
#1
Engine miss/vibration 5.4 3 valve
Hey guys,
I just did my plugs in my 04 F150 5.4 The truck had a really bad miss, and I figured it was time for plugs. I broke all eight plugs which I expected as the plugs were in there since new and had 120 000 miles on them. Replaced with champion double platinum and I am not certain that was the best idea.
The truck is much better with the new plugs but still has a miss and a rough vibration. The truck seems to shake side to side at idle but smooths out during normal driving conditions. I have noticed that it seems to lack power intermittently if that makes any sense. Also, the check engine light was on for a while but I tracked that down to a broken wire in the evap system.
So I am thinking first step is to verify that the coils and boots were installed correctly. I have to see if we have the scope module for the Genisys at work. I am going to check for vacuum leaks as well. I just changed the fuel filter and no change.
Is there anything else I should look at? Would cam phasers cause a rough idle and intermittent loss of power?
Any ideas are much appreciated. I don't drive this truck every day so I can take it apart to diagnose it further
Thanks
I just did my plugs in my 04 F150 5.4 The truck had a really bad miss, and I figured it was time for plugs. I broke all eight plugs which I expected as the plugs were in there since new and had 120 000 miles on them. Replaced with champion double platinum and I am not certain that was the best idea.
The truck is much better with the new plugs but still has a miss and a rough vibration. The truck seems to shake side to side at idle but smooths out during normal driving conditions. I have noticed that it seems to lack power intermittently if that makes any sense. Also, the check engine light was on for a while but I tracked that down to a broken wire in the evap system.
So I am thinking first step is to verify that the coils and boots were installed correctly. I have to see if we have the scope module for the Genisys at work. I am going to check for vacuum leaks as well. I just changed the fuel filter and no change.
Is there anything else I should look at? Would cam phasers cause a rough idle and intermittent loss of power?
Any ideas are much appreciated. I don't drive this truck every day so I can take it apart to diagnose it further
Thanks
#2
#3
#4
I have the same problem with my 2005 f150 FX4. I installed autolite plugs and now I got a p358 code. So I replaced all cops. no change. changed the cam sensors no change. replaced the cam sensor no change. I have been looking on line but no help. Iam retired and I do not want to take it to Ford.
#5
I have the same problem with my 2005 f150 FX4. I installed autolite plugs and now I got a p358 code. So I replaced all cops. no change. changed the cam sensors no change. replaced the cam sensor no change. I have been looking on line but no help. Iam retired and I do not want to take it to Ford.
#6
#7
My miss and vibration seemed to resolve itself. I am not sure if it was the fuel filter or maybe I put too much anti seize on the plugs. It still does seem to have a lack of power during hard accelerations. I can tell the engine is under load but it just doesn't seem to have its usual get up and go. I am thinking the catyletic converter may be starting to go. Now I just have to figure out a way to diagnose it
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