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Spark plug?

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Old May 4, 2007 | 11:25 AM
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Default Spark plug?
Well i pulled a plug out of t/a today and they were gapped .72. Is this to much? And what are the factory plugs because it has the ac delco 41-9?? in it and it has a 120,000 miles on it and i think they are the originals. Whats a good plug to put back in it??
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Old May 4, 2007 | 01:00 PM
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That gap is too wide and the stock gap is 0.060". The reason your plug was 0.072" is the platinum disk is missing from the ground. These typically fall off early in the life cycle of the stock GM plugs. You will need to replace the plugs and make sure the gap is set up properly.
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Old May 4, 2007 | 01:53 PM
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Default TR55's @ .055
NGK TR55's gapped at .055. Cheaper and they work great.

Bob K.
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Old May 4, 2007 | 02:23 PM
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Mother of Pearl that's gapped to much!!!!!! They should gap a .40 to .50 depending on the application.
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Old May 4, 2007 | 03:48 PM
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Me and my buddy figured that was way to much. I think i may of figured out why my gas mileage sucks too. Do you guys think it will run alot better with new plugs??
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Old May 4, 2007 | 03:48 PM
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Oh hell yeah
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Old May 4, 2007 | 03:55 PM
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I didnt really think to check them b/c I ran 8.44 in the 1/8 and i thought that was pretty good for being stock. I guess i'll change them and see how it does.
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Old May 5, 2007 | 07:12 AM
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yup! to much gap, change them and let know how you do at the track.
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Old May 5, 2007 | 08:24 AM
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will do
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