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Old 08-11-2013, 05:55 PM   #1
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Different spark plug

In my 98 mustang gt I had a plug blew out because of a mis thread so I had a guy fix it well my old spark plug got lost while my stang got towed to his shop so he tell me he went ahead an put me in a new plug because he said he had to use a big one well my old one was a bosh platinum and now my new one is a motorcraft platinum (agsf 32fm) well my car drove great for a few days now its not

Could this be the reason or is it something else?
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Old 08-11-2013, 06:24 PM   #2
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Anybody know why one spark plug to be burn and not the others?

---------- Post added at 06:24 PM ---------- Previous post was at 06:23 PM ----------

Can anybody give me a diagram of a 98 plug wire to spark plug to coil pack diagram?
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Old 08-11-2013, 08:25 PM   #3
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Why isn't it running good now? Is it misfiring? Check the codes to see if it is, and what cylinder. Or i'd just take it back to the mechanic and let him figure it out.
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Old 08-11-2013, 08:46 PM   #4
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More likely an issue that isn't the plug itself. Did he helicoil it? Using a "bigger plug" sounds seriously flaky.
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Old 08-11-2013, 09:35 PM   #5
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Quote:
Originally Posted by Roguestang View Post
Why isn't it running good now? Is it misfiring? Check the codes to see if it is, and what cylinder. Or i'd just take it back to the mechanic and let him figure it out.
When I drive about 50 or going up hill it jerks engine you can here it in my exhaust almost sound like its farting

But he replaced number 3 plug and it seems to be doing okay but number 4 plug burnt to hell and back

When payday roll around I'm going to get all the same motorcraft plugs maybe that my problem but here what my old one looks like



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Old 08-11-2013, 09:39 PM   #6
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More likely an issue that isn't the plug itself. Did he helicoil it? Using a "bigger plug" sounds seriously flaky.
You mean like jb weld? Naw I took it out I think I misunderstood him but that plug seems to be doing okay I took it out and look at it and its good but the others and ruff looking
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Old 08-11-2013, 09:50 PM   #7
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Definitely a missfire then. Possibly not gapped properly? They should be at .54. I'd try to pull codes as a start and go from there. Did you talk to the mechanic about it? And if I'm not mistaken, these 4.6's usually like regular copper motercraft or autolite brand. Thats what I always use.
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Old 08-11-2013, 10:13 PM   #8
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Definitely a missfire then. Possibly not gapped properly? They should be at .54. I'd try to pull codes as a start and go from there. Did you talk to the mechanic about it? And if I'm not mistaken, these 4.6's usually like regular copper motercraft or autolite brand. Thats what I always use.
Well Bosch ones I got came no gapped required idk if you tell in the pictures how they look different from other plugs but the motorcraft plug might've been gapped I didn't see him put that one in but in sure he did but I will recheck it

no I didn't talk to the mechanic he's one of those do car work on the side jobs but we prolly tell me to bring to him and he'll fix it but I'm want to do it myself first then take it to him if still not right

And so your pretty much saying don't get platinum plugs just get motorcaft?
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Old 08-12-2013, 05:20 AM   #9
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Yeah I know the bosch platnum doesn't have to he Gapped since its got like 4 prongs on them. I wasn't sure about the new one. But yeah, I just changed the plugs out on my 00' this weekend, and I got the regular copper plugs. Just my .02
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