This may just be stabbing in the dark, but you might want to try hanging a couple of 110v shop lights with 50 to 60 watt heavy duty incandescent light bulbs under the hood, front and rear, down toward the lower part of the engine.
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Stan, Shirley & 2 Schnauzers (Sandy & Sassy)
RV: 2014 Itasca Sunstar 35F
USAF, Retired, Life Member: DAV, VFW & VVA
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