99 Itasca with 454, what spark plugs?
Title says it all but can anyone tell me with certainty what spark plugs I should use on my 1999 Itasca P32 with 454?
The plugs that are in there now are Autolite AP 605 with gap of .050
I have a problem when going up a steep hill, and the tranny downshifts, rpm goes to 2500 and the MH starts to shake and shudder.
Just installed Banks Torque headers and new Cats.
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99 Itasca Suncruiser 32T, 454, Banks headers
99 Jeep Wrangler Sport flat towed
Sierra Vista. AZ
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