Spark plug change stuttering now.
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Freshman User
Joined: Mar 2010
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Spark plug change stuttering now.
I changed the spark plugs in my 01 250 with a 5.4 gaped them to .055 and the truck misses now. a random pop at idle and it will stutter when driving if you get into it hard it will slowly pick it's power back up like little pulses till it runs perfect. I unplugged the coil plugs one at a time and each one made the truck run worse so I don't think it is the coils I just changed the fuel filter to see if it ran better and not much of a change. This issue started right after I changed the plugs tho.
Mountain Pass
Joined: Mar 2009
Posts: 158
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Check the plugs on top of the fuel injectors, we knocked one loose, actualy broke the little retaining clip off of one doing a plug change on a V10. Went for a test drive after the change and had a miss, and found the plug was loose on one injector, zip tied it back down, no more miss. A cracked insulatetor on a spark plug can also cause this to happen.
Senior User
Joined: Oct 2009
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From: Parlin NJ
It won't crank at all. Does it make any kind of noise at all. A clicking sound or anything. Seems like it might not be related at all. Hard to say without hearing it. Try to give more info I'm sure someone will know what direction to goto with the problem
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Freshman User
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there is an aftermarket alarm system on the truck that the previous owner installed. he said it was disconnected but its not. so we get to figure out how to do it.
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Freshman User
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Figured it out the alarm system either didn't like the hood open or the truck wanted me to close the hood after I reconnected the battery.
But the injector plugs are all hooked up still stuttering.
But the injector plugs are all hooked up still stuttering.
Senior User
Joined: Oct 2009
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From: Parlin NJ
Sounds like the starter kill switch on the alarm. Your gona have to get a wire diagram of the truck and get up under the dash and disconnect the alarm wire going to the ignition. Unless there is a over ride switch around the steering coloum u can deactivate it that way
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Freshman User
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The plugs were good I made sure to check them before I put them in. But the #1 plug on the drives side had that head issue I pulled it out barely and put a new one in the new one went in easy the old one looked like it had gotten welded or something along those lines.
EDIT: No worries Twall Thanx for the help tho.
EDIT: No worries Twall Thanx for the help tho.
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Freshman User
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Well it made the truck run worse when I pulled the wiring for that coil because the cyl stopped firing so this lead me to believe it wasn't the problem. My question is why isn't the CEL on? if it has a misfire shouldn't it come on?
Elder User
Joined: Dec 2008
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From: North Carolina
Let us know what you find. Im getting ready to change plugs too...