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Re: Running kinda funny
The hose running over to your vacuum advance could be older / dry rotted and may have developed a small crack. If the engine is warmer, the hose is warmer too and the crack is not as noticeable to the engine. If it's really cold the hose shrinks a little, cracks open up and the vacuum leak becomes an issue. May explain why you never noticed it until it got really cold.
 (total guess) .. but I'd replace that hose and see if it clears up.
Have you made any changes to the engine recently? just a daily driver? It does sound like vacuum advance issues to me, just my first thought anyway.
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Chad
1967 C10 SWB - Project Savannah - 6.0/4L80 *Currently underway*
1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy
1986 Silverado Short Fleet - Scarlet *Sold*
1985 Silverado Short Fleet *Sold*
2022 Jeep Gladiator Mojave
2001 Jeep Cherokee XJ 4x4 - Lifted, Built
1992 Jeep Cherokee XJ 4x4 - Lifted
2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride)
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