Changed to Copper plugs and MPG drops
I changed my spark plugs about a week ago and I am getting terrible gas mileage and maybe it's just in my head, but it seems as if it may be running a little rougher too. I had the NGK platinums in but switched to the coppers.
Now,I have read that people change from platinums to copper with no problem. When gapping the plugs I used the wire kind. I adjusted the tip(.044) until there was just a little resistance when pulling the spark plug gauge out. Is that how it's supposed to be done? Do the platinums have to be gapped? I tested the gap in my old plugs(plat), and the gap is smaller than .044. I just would hate to have to spring $60 for the plats to get my normal MPG back. Did I do something wrong here? |
Shouldn't be running rougher than before even if you used coppers. Put the old plugs back in and see if it runs smooth again
Have you changed out any other tuneup related parts? |
what do u mean u gapped it with the wire kind? wthat?
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Originally Posted by s0ber
what do u mean u gapped it with the wire kind? wthat?
or here: http://www.cars.com/advice/caradvise...ugs_image2.jpg etc. |
OoOoO thats interesting, never seen that before.. lol
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Originally Posted by s0ber
OoOoO thats interesting, never seen that before.. lol
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arent the NGK ones already pre-gapped ?
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Originally Posted by maX5
arent the NGK ones already pre-gapped ?
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check your codes?
it's possible something isn't seated properly. |
Coppers come pre-gapped if the part number was BKR5E-11. If they didn't have the -11 on them they weren't pre-gapped, but I've never seen a set that WASN'T pre-gapped.
Anyways I personally thing this is in your head. |
Originally Posted by Nealoc187
Coppers come pre-gapped if the part number was BKR5E-11. If they didn't have the -11 on them they weren't pre-gapped, but I've never seen a set that WASN'T pre-gapped.
Anyways I personally thing this is in your head. The reason I gapped the coppers was because I have read on here that they weren't pre-gapped and the platinums were. But even if they were pre-gapped isn't the gap still supposed to be .044? I just need to know if I need to do some more gapping. If all else fails I will buy more copper plugs and leave them as they are if they are indeed pre-gapped. Thanks for the responces. |
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