Question about 2000 Ford Expedition
Service engine soon light came on at an idle when cold outside had codes pulled 171 174 and its surging at idle almost dieing. also heater doesn't blow hot unless reved up and it is only blowing around 70 degrees did a self test on heater module and blend door its ok. i have flushed both heater cores and changed thermostat. it has new spark plugs and boots and two new coils. could the heat problem the miss and engine codes be the intake gaskets
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Posted on Jan 02, 2017
The heater only blows HOT air when set on defrost or floor settings. If you have the lever set for vent, only cold air will come out. Check to make sure you set the controls to floor or defrost. This is standard for all Festiva's.
Posted on Nov 16, 2008
SOURCE: 1998 ford f150- heat issue
There is no heater valve on a 1998 ford F-150. The hoses for the heater lead directly from the engine and go to the heater case. PS The heater doors are all vacuum controlled so you might wanna look under the dash for any lines that might be disconnected
Posted on Jan 28, 2009
I had the same problem and replaced the spark plugs, and also the tubes that run from the coils to the spark plugs. there is a spring inside the tubes that was brooken and that fixed the problem.
Posted on Sep 22, 2009
You just might have an air lock. Try bleeding the system from the heater hose at the firewall. Losen one hose a little, and at operating temp. open slightly to let air out. You will lose some coolant, but just refill the rad. Now, both hoses should get hot.
Posted on Jan 01, 2010
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