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  1. 9

    98 4.6 heat issues

    Replaced front heater core 18 months ago, both hoses are warm and not overly hot, when sitting air is cool and when driving it is warmer but not like it should be. position selector works for vent, defrost, etc but the temp control feels weird. no heat out of rear at all........
  2. 9

    No heat

    98 Expy 4.6 4x4, changed heater core last winter. Now have very little heat out front and none in rear. Noticed the temp selector feels wierd during rotation. front heater hoses feel about the same. Not losing antifreeze.
  3. 9

    Headache!!! 98/4.6

    Had a significant miss several months ago. changed plugs all but #7 (unable to remove) and wires. Ran fine. Heard loud hiss like vaccum leak and found pcv valve hose was cracked near pcv valve. splice it back and cleaned a real gunked up pcv valve. Now significant miss again with loss of power...
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