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As the van is warming up, it misses just before getting to full operating temp. summer better than winter. problem is definitely operating temp related. never misses again after warm-up. new 2014 engine with 2k miles. Any help??

(1999 Oldsmobile Silhouette)
in Ogden, UT on April 30, 2015
New GM engine with 2k miles runs perfect after warmup. I'm a little worried that whatever is wrong may finally end up with engine not starting as part wears out. This condition causes no codes to be set. Thanks for any help.
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Popular Answer
on April 30, 2015
Usually the engine installer takes care of those problems!
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on May 03, 2015
Pushrod, the van has been the GM dealership for over a week and they are drawing a blank. I need the van for a trip in a few days so, since it runs okay I am going to take it back and just put some miles on it. The service manager says they are reluckant to start throwing parts at the problem, but agree there is something amiss.
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