Yes. A cool engine and/or cool ambient temps cause the IMG to leak worse due to shrinkage (

) Once the engine warms, the leak get smaller & the truck will run better. An IMG with HUGE hole will cause hard starts & stalling at idle all the time.
G/luck
Joel
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2007 Chevy Cobalt LS 4dr, auto
2008 Honda Odyssey LX chick magnet
Gone but not forgotten

: 2001 Ford Windstar LX, 2005 Trailblazer LS 4x4, 2002 Isuzu Rodeo LS 4x4 & and many more.