Re: Heater no hot air from Heater?
The two-stage fuel pump being discussed top section is a vacuum pump that senses manifold vacuum as lessening and then will cut in and supply vacuum for any vacuum accessory. It will not cut-in until a low manifold vacuum signal is sensed.
Way too much confusion here. A vacuum gauge and MITY-VAC (along with correct factory manual) is all that it needed to diagnose no/low heat.
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- WHY IS IT ...  -
... that everything you buy in the grocery store is either wrapped in or contained in plastic but the government doesn't want you to carry it out in a plastic bag?
WONDERING IN W(BY GOD)V ... 
DIAGNOSED CDO - (OCD In Correct Alphabetical Order) |