RPMs fluctuate while driving uphill - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 04-14-2014, 04:07 PM   #11
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Any recommendations as to what plugs and plug wires to buy?
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Old 04-14-2014, 05:15 PM   #12
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seems to be an ongoing debate. you need at least platinum on that engine to make it run good. wires are tough i used to buy nothing but delphi or delco but now they seem as bad as the cheap Chinese ones. i bought the middle range autozone ones a couple times with pretty good luck.
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Old 04-15-2014, 05:07 AM   #13
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I used NGK Platinum plugs & Wires. 2 years later, both are still in excellent shape.
The NGK are exact fit to vehicle/engine required lengths as well.
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Old 04-28-2014, 08:57 PM   #14
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Well I changed the spark plugs and wires...didn't help. I've been researching online and some possibilities are a fuel issue (filter, pump, etc.) or bad ignition coil packs. I changed the fuel filter (didn't help) but I'm sure it needed it anyway. I'll probably just take it in again and hope it acts up for the mechanic.
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Old 04-29-2014, 08:52 AM   #15
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Old 04-29-2014, 10:34 AM   #16
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I've read that could be a possibility too. Good idea! Looks like an easy test. I will do that for sure
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