Question about 1998 Ford Explorer
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Posted on Jan 02, 2017
Have your egr valvle checked, if not operating properly it can cause engine 'pinging' which sounds like what u are describing. Let me know how it goes. countrycurt0
Posted on Oct 03, 2008
heater control valve..heater core clogged ..circulation to heater control valve weak restricted or closed..do a radiator flush and fill thoroughly backflushing the heater lines with heater open all the way...if no smell or leaks inside cabin passenger area or losing coolant you should fix teh problem... other issue could be control head not opening blend doors properly
Posted on Jan 13, 2009
Sounds like the vac valve is bad to the A/C controller. It should be located in the vac line from the intake before it goes thru the firewall to the controller.
Posted on Jun 07, 2009
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