4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

Used wrong plugs. Fuel not completely igniting.... Recomendations??

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Old 10-01-2007, 02:37 PM
  #41  
X04Mach1X
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Default RE: Used wrong plugs. Fuel not completely igniting.... Recomendations??

lol its ok were not arguing just conversing.... and yeah, just try it out sometime if you get boredtosee how you like it i assure you its not gonna hurt anything
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Old 10-01-2007, 02:38 PM
  #42  
havok209
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Default RE: Used wrong plugs. Fuel not completely igniting.... Recomendations??

ORIGINAL: swooshonln

ORIGINAL: havok209

Hey! knock it off you two... Now both of you shake e-hands. X04Mach1X it might have somthing to do with the fact that you've got a 4 valve or something like that. But thanks for your help. I'll probably end up trying it out later simply because I like to try out new things. But for right now I'm probably gonna gap them at .054 just to make sure that that was the problem. Maybe i'll gap each side of the engine differently and see which side of the engine I like better hehe....
lol. I hope that was a joke [sm=icon_rofl.gif]

Weelll... I wouldn't say a joke but more of a comment with some humor in it.
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Old 10-01-2007, 03:06 PM
  #43  
mfj
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Default RE: Used wrong plugs. Fuel not completely igniting.... Recomendations??

the only time i would gap my plugs to a .035 is if i was running a 150 shot. ur gap should be .054
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Old 10-01-2007, 05:35 PM
  #44  
Lavitz
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Default RE: Used wrong plugs. Fuel not completely igniting.... Recomendations??

I wouldn't listen to X04Mach1X. The gap needs to be changed as you add power or alter the compression ratio you're running. On a stock engine you should be running .054 as stated by many of the others. If you added a supercharger, nitrous, or change the compression ratio you'll need to change the gap but leave it at .054 on a stock engine.
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Old 10-01-2007, 06:23 PM
  #45  
blownbayou
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Default RE: Used wrong plugs. Fuel not completely igniting.... Recomendations??

Gapped to the lower number on the underhood spec sticker.....Idles and runs like a champ!!!!

Later
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Old 10-02-2007, 08:08 AM
  #46  
havok209
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Default RE: Used wrong plugs. Fuel not completely igniting.... Recomendations??

Alright, I changed them out last night. The old ones were completely crisped. The tip looked like it was made of coal or something. But the thing is that they weren't more than a month old and they were gapped to .054 so I'm not exactly sure what the deal was. But it does run a hell of a lot better considering I couldn't get 1 out because I sorta stripped the coilpack bolt...hehe. But I'll get it off and swap that one out later today. Still sorta puzzled on why they went bad so quickly.
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Old 10-02-2007, 08:22 AM
  #47  
X04Mach1X
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Default RE: Used wrong plugs. Fuel not completely igniting.... Recomendations??

i bought my car a month and a half ago, with full tuneup and plugs, my plugs went bad already too hmm .054 gap maybe? that gap is huge!!!

also i dont know if you know this or not but cruising around in 5th gear or below 1500 rpm is not good for our plugs.
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