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Want to index my spark plugs

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Old May 19, 2008 | 10:07 PM
  #1  
Shawnfrom66's Avatar
Shawnfrom66
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Want to index my spark plugs

Guys, I am going for all the fuel economy I can get, and I want to index the spark plugs. I have an inline 6, and I haven't found a picture of the inside of the head to see whereabouts the intake ports are.

Besides fuel economy, the motor vibrates, although it sounds smooth and the tach doesn't fluctuate. ...shakes the gearshift on the 5 speed about a half inch to either side. I really want to smooth that out.

In the morning I am going to make sure all the plugs are gapped correctly and see if that makes a difference. I don't know how old the coil is or if that makes a difference. The last time I indexed spark plugs was about 15 years ago on a small block dodge, but I think it is time. I remember it smoothed things out even more and gave me better performance.

Thanks for any and all help.

Shawn Michael.
 
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Old May 19, 2008 | 10:11 PM
  #2  
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you need to find out why it vibrates.

indexing the plugs is probably not going to solve it.

are ignition wires on correctly and in good shape?

cap condition? plug brand and condition?
 
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Old May 19, 2008 | 10:20 PM
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New duralast gold cap from Autozone. Plug wires were a Christmas present this year. If checking the gaps on the plugs doesn't smooth things out some, even if it does, doing a bleed down check on the cylinders soon. Head has about 20k miles on it. Can't remember what brand the plugs or wires were, but have some 8.5 mm MSD wire and components coming in, should be tomorrow new wiring harness by Wednesday.

Thanks again

Shawn
 
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Old May 20, 2008 | 05:41 AM
  #4  
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alz
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Check your motor mounts. If they're on their way out or bad they may cause your problem.
These old trucks really like the OEM stuff, stick with Motorcraft brand ignition parts.
 
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Old May 20, 2008 | 07:59 AM
  #5  
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Also do a compression check, a weak lung will certainly create vibrations.
 
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Old May 20, 2008 | 08:33 AM
  #6  
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Originally Posted by Shawnfrom66
New duralast gold cap from Autozone. Plug wires were a Christmas present this year. If checking the gaps on the plugs doesn't smooth things out some, even if it does, doing a bleed down check on the cylinders soon. Head has about 20k miles on it. Can't remember what brand the plugs or wires were, but have some 8.5 mm MSD wire and components coming in, should be tomorrow new wiring harness by Wednesday.

Thanks again

Shawn



dump the auozone cap.

checking gaps and indexing are two different things.

replace the plugs with motorcraft copper plugs.

triple check ignition wire order.
 
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Old May 20, 2008 | 11:30 AM
  #7  
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Indexing plugs is a lot of work of very little if any gain.
 
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Old May 20, 2008 | 11:39 AM
  #8  
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I agree Jason, I was going to suggest taking a nap or reading a good book or cruise the net, instead of wasting time on the indexing deal, its one of those hot rod magazine catch phrases that some think really mean something.
 
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Old May 20, 2008 | 11:47 AM
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Okay guys, if you say so. I was looking at things just now, and it is going to be kinda hard to see the lines on the plugs showing me where the dang thing is pointing with everything already installed on the motor.

and der.... for some reason I didn't check the motor mounts. gonna get to that after work.

speaking of which, time to pay some bills

later.


Shawn Michael.
 

Last edited by Shawnfrom66; May 20, 2008 at 11:49 AM. Reason: I usually click send before I think about if I am finished or not.
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