Question about Volvo XC70
This sounds like a crossed sparkplug wire, start by making sure the firing order is correct, if theres a sparkplug wire in the wrong spot this would cause hard starting and the backfiring, so check the firing order first, i would of given you a firing order diagram but you forgot to list the year, make , model and the engine size. good luck and have a good day.
Posted on Mar 18, 2011
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Posted on Jan 02, 2017
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