5.4L Is missing after cleaning
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5.4L Is missing after cleaning
Hello to all, this is my first post, but unfortunately it is under less than great circumstances.
I just had a Flowmaster Super 40 installed on the truck, so I was feeling good and decided to detail the engine. I sprayed a little degreaser, hosed it off and added a nice shinny dressing solution on it.
So I go to started it and now it has a consistent miss all the time. Whether it is in gear, out of gear, driving or idling, it always has a miss.
What would be the best thing to do? If I use a code reader will it tell me what cylinder is missing? How probable is it that a COP fried?
Thanks in advance for your information and patients.
I just had a Flowmaster Super 40 installed on the truck, so I was feeling good and decided to detail the engine. I sprayed a little degreaser, hosed it off and added a nice shinny dressing solution on it.
So I go to started it and now it has a consistent miss all the time. Whether it is in gear, out of gear, driving or idling, it always has a miss.
What would be the best thing to do? If I use a code reader will it tell me what cylinder is missing? How probable is it that a COP fried?
Thanks in advance for your information and patients.
Hotshot
Joined: Aug 2002
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From: BC, Canada
Hi and welcome to the forum 
A normal scanner will tell you which cylinder is misfiring only if the misfire sets a code. You might have to drive it quite a while before it will do that.
Most likely you just have water in one of the spark plug holes and that's shorting out the plug or COP. It's some work but if you remove all the COPs and dry them and their holes you'll probably cure the miss.
How many miles on your truck? If it's anywhere close to being due for new spark plugs now might be a good time.
A normal scanner will tell you which cylinder is misfiring only if the misfire sets a code. You might have to drive it quite a while before it will do that.
Most likely you just have water in one of the spark plug holes and that's shorting out the plug or COP. It's some work but if you remove all the COPs and dry them and their holes you'll probably cure the miss.
How many miles on your truck? If it's anywhere close to being due for new spark plugs now might be a good time.
Last edited by Racerguy; Mar 26, 2005 at 07:31 PM.
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I was worried about using the 40 series but I was told it is what he installs on the majority of the Fords. The 40 sounds very nice and has little resonance inside the cab.
Well, I am thinking the water theory is where the problem lies. Today, the missing had subsided, but came back after a restart.
When the missing comes back it isn't as bad as before. It is more noticeable upon an easy acceleration from a stop.
I am very mechanically incline, but what shop manual would be the best?
Well, I am thinking the water theory is where the problem lies. Today, the missing had subsided, but came back after a restart.
When the missing comes back it isn't as bad as before. It is more noticeable upon an easy acceleration from a stop.
I am very mechanically incline, but what shop manual would be the best?
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Originally Posted by Racerguy
A normal scanner will tell you which cylinder is misfiring only if the misfire sets a code.
Last edited by Racerguy; Mar 26, 2005 at 07:31 PM.
Hotshot
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From: BC, Canada
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Originally Posted by Racerguy
Yup that's right.
Has your light been on?
Has your light been on?
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Hotshot
Joined: Aug 2002
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From: BC, Canada
Before you reset it you should take the truck and get it scanned to see what code you have so you can figure out what caused the light to come on. Some parts stores will do that for free. The code can also be cleared to turn out the light with the scan tool.
Or you can just disconnect the battery for a few minutes and that will clear it too.
Or you can just disconnect the battery for a few minutes and that will clear it too.
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Thanks for everyones help. I reset the computer after realizing I should have waited and found out what the code was.
Now, just because I reset the light, that doesn't mean the code will be gone. Doesn't it store the code in the computer?
Now, just because I reset the light, that doesn't mean the code will be gone. Doesn't it store the code in the computer?
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Well, since the start of this post, the truck has now stopped missfiring. I was told if I were to clean the engine again use WD-40 to displace the water under the COP.
I don't want this problem to ocurr again, but I don't want a dirty engine. What does everyone else do to clean their engine?
I don't want this problem to ocurr again, but I don't want a dirty engine. What does everyone else do to clean their engine?
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From: Deep in the IE, So CaL
Ahhh!
Good old Water Displacement attempt Number 40.
Made by good ole folks in San Diego, California who know what good penetrating oil should smell like!
Works great on masking those pesky foul odor's too!
Lman
Good old Water Displacement attempt Number 40.
Made by good ole folks in San Diego, California who know what good penetrating oil should smell like!
Works great on masking those pesky foul odor's too!
Lman
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