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  #1  
Old 10-16-2011, 06:33 PM
2004 supercab xlt, 4.0
 
Join Date: Aug 2011
Posts: 155
Default Pinging in 4.0 sohc

I'm getting a pinging noise under load. Usually going up a hill will do it. The pinging is light, and premium fuel makes it go away.

Is there a "fix" for the pinging, so I can use regular fuel?

Engine has 71k miles, has new iridium plugs ( motorcraft), mobile 1 oil..
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  #2  
Old 10-17-2011, 03:12 AM
A Damn Proud Maritimer
 
Join Date: Nov 2010
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Default Re: Pinging in 4.0 sohc

Auto or Manual, what gears do you have? Time for Seafoam perhaps?
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  #3  
Old 10-17-2011, 05:49 AM
2004 supercab xlt, 4.0
 
Join Date: Aug 2011
Posts: 155
Default Re: Pinging in 4.0 sohc

It's an automatic with 3:55 open diff. And stock size tires. On a recent trip I ran a can of seafoam through the fuel tank. I added the seafoam, filled the fuel tank and then drove 350 straight miles on the interstate.

Time to add it through a vacuum hose?
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  #4  
Old 10-17-2011, 06:06 AM
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Join Date: Nov 2009
Posts: 1,771
Default

I'd be careful about running it through a vac hose. If it needs it, then it may foul the new plugs.

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  #5  
Old 10-17-2011, 06:16 AM
2004 supercab xlt, 4.0
 
Join Date: Aug 2011
Posts: 155
Default Re: Pinging in 4.0 sohc

The original plugs were different from left bank to right bank. They looked he same but they had different part numbers. My new plugs were all the same. I went to two different parts stores looking for plugs. Niether one showed different plugs for left ands right bank.

Why different plugs?
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  #6  
Old 10-17-2011, 07:06 AM
TTB man
 
Join Date: Aug 2010
Posts: 1,923
Default Re: Pinging in 4.0 sohc

I was going to suggest plugs...that's a big problem w/ them...get a set of Autolite double platinums and you'll be good to go. Also, try a slightly thicker oil like 10w30 or 40.
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  #7  
Old 10-17-2011, 06:32 PM
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Default Re: Pinging in 4.0 sohc

Quote:
Originally Posted by brinker88 View Post
I was going to suggest plugs...that's a big problem w/ them...get a set of Autolite double platinums and you'll be good to go. Also, try a slightly thicker oil like 10w30 or 40.
+1 and if that doesnt help try a new coil pack.
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  #8  
Old 10-17-2011, 06:40 PM
hillbilly
 
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Default Re: Pinging in 4.0 sohc

your not gaining anything with a coil pack unless yours is screwed up
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  #9  
Old 10-17-2011, 07:11 PM
Learning to use the forums
 
Join Date: Oct 2011
Posts: 10
Default Re: Pinging in 4.0 sohc

What octain fuel are you having to use?
Almost every car and truck require at least 87. Some ownes manuals say 91 has a minimum.
You may have to run the higher octain.
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  #10  
Old 10-18-2011, 03:13 AM
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Default Re: Pinging in 4.0 sohc

Quote:
Originally Posted by mossyoak03 View Post
your not gaining anything with a coil pack unless yours is screwed up
there was a ford service bulletin on weak coilpacks not producing enough voltage to the plugs causing pinging.
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