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Old 01-31-2018, 03:08 AM   #1
Dealmobile
 
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Misfiring? Rough idle after starting

Howdy all!
I've been having some rough idling or misfiring(I'm not sure...) after starting that goes away in 5-30 seconds or so.

I have a 99 3.4 w/97k miles and never had changed the plugs/wires so I just put in ac delco wires and iridiums plugs. I checked/fixed gap before installing. I also just got a new battery, checked air filter, cleaned my maf sensor a lil more than year ago so idk if that's due...
Here's a video after starting and a few pics of the old plugs, I suppose they look ok to me, nothing I can notice. Thank you for any opinions or suggestions on what could be wrong or a potential solution!
Thank you guys!!

https://youtu.be/98cju0aBFFQhttps://youtu.be/98cju0aBFFQ
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Old 01-31-2018, 11:14 AM   #2
zzyzzx
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How big are the gaps on the old plugs?
Also, how hard were they to get out? I would think that having them in that long might make it difficult to remove. Yes, I still have the original plugs in my 99 at around 50K miles.
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Old 02-05-2018, 07:32 PM   #3
Dealmobile
 
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The old gaps were .62-.68 mostly but one was .74. The plugs were in pretty good so I had to use some force but not too bad. The wires were a pain on the front and a nightmare on the back-they were melted onto the plugs there.
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Old 02-16-2018, 10:05 PM   #4
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fuel regulator if it is difficult to start, smell gas and rough idle for a few minutes.

Check the plugs.

Don't be afraid to get some seafoam in the gas, oil and air intake in case of carbon build up.
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