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lawnspecialties's avatar
lawnspecialties
Explorer
Jun 02, 2015

Spark Knocking

2013 F350 with the 6.2L. Around 44,000 miles.

Pulling the Work & Play, I guess we're around 15,000 lbs. total. I've been noticing lately some detonation; especially on hills. I've read before that some detonation is OK and expected when towing big loads. But I tow with this truck a lot.

Should I be concerned? Should I go ahead and bump up to 89 octane?
Tow Vehicles
  • carringb's avatar
    carringb
    Explorer
    Jun 02, 2015
    A small exhaust leak at the manifold can sound like knock too. At the very least, it would be a good idea to take it to the dealer, and let them do diagnostics. They'll be able to see if its actually knocking or not, or if its a non-harmful noise.

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