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c/auto-mechanics•wren806wren806•24d ago

Unpopular opinion: new coil packs aren't always the fix

Just had a misfire on a 2015 F-150 last Tuesday. Swapped all 8 coil packs and it still ran rough. Turned out it was a corroded ground wire under the battery tray, wasted $320 on parts I didn't need. Any other guys here actually check wiring before throwing parts at it?
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2 Comments
betty_reed61
Yeah, ended up being a loose ground strap on mine too.
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xena_rivera63
Do you think it was from the factory or road vibration?
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