Heat riser is operated via rod connected to vacuum pulloff, vacuum is supplied from EFE (early fuel evaoration) ported vacuum switch on intake manifold near water neck. As it sits now, I need vacuum immediately after startup to close heat riser to direct heat across my intake to aid warmup in cold weather. Problem is majority of vacuum switches are normally closed and do not open until warm, this really has me scratching my head.
2007-11-07
04:27:43
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2 answers
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asked by
Anonymous
in
GMC