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  #1  
Old 04-10-2019, 07:51 PM
Khunter0226 Khunter0226 is offline
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2004 Chevy Impala

All of my coil packs are firing except 1&4 what could cause that? I bought new coil packs still same issue, car still runs just vibrates
Also what is this called in photo
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Old 04-11-2019, 10:47 AM
maxwedge maxwedge is online now
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Re: 2004 Chevy Impala

Bad connections, or a bad ign control module, most common causes.
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Old 04-11-2019, 09:37 PM
Tech II Tech II is offline
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Re: 2004 Chevy Impala

Agree with Max, ICM.......
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