Idiling high, temperature guage not working. no check engine . no problems shifting, fan coming off & on, blowing hot and cold air. can drive it, but it wont start up right away & i can smell fuel when trying to restart. replaced tp sensor already. Any thoughts?
First check to do is make sure the accellerator cable is not over adjusted. Check fuel lines and injectors for leaks may have loss of fuel pressure. Check all vacuum hoses for cracks and splits. check air tube between air filter housing and throttle body make sure it has no splits. Good luck.
Check the cable to the temp sender unit is attached if so check the unit is working with a ohms meter. check the throttle cable is not binding ,the throttle leaver stop at the throttle body housing should be fully closed .
SOURCE: 96 Ford truck engine lIght will not go away.
this is the problem with code readers they bwill tell you the code and sometimes even have a reset feature. However they do not tell you the parameters and don't have an drivability feature so you can not test the ecm and all the sensors or modules while engine is running. diagnostic scan tools are very expensive and hard to use unless you have been trained to do so and PEP BOYs is not what I call real reliable mechanics to begin with. Now I concure with toddG on his reasoning in what might be the potential fault. if your vehicle is running rich or lean your O2 sensor will pick this up on the exaust side, however it is not the sole sensor responsible for the ecm adjusting the fuel air mixture.. you stated that you have switched out several o2 sensors and the fuel pressure regulator, but there is also you mass air flow sensor, your TPS sensor, as well as your map sensor these are worth checking out and just because a faulty sensor is the problem doesn't mean you will get a code each time. the system is built with redundancy in order to keep the vehicle running. in order to get the best possible diagnois take it to a shop where they have a full diagnostic scanner this will have not only OBD1 and OBD2 but cam protocol as well. while the tech is scanning the vehicle he will be able to see how the engine is performing under realtime conditions. please rate this as well as change the rating for toddg because he did offer a valid suggestion
SOURCE: defrost blows cold air
Sounds like you have a plenum door that is not opening when you go into defrost mode. You will have to check all your vacuum hoses and switching valves under the dash to see which one is not working. Hope this helps.
SOURCE: Temperature Control not working on 1999 Ford Explorer
Sounds like your temperature actuator is not moving or your temp door is broken. On max a-c ,coolant is shut off to your heater core allowing only cold air in.
SOURCE: Heater blows cold air.
heater cores clog in taurus. way to know is this--engine fully hot--heat on reach down to the fire wall and grab hold of one of the heater hoses where it hooks to the core--one should be real hard to keep hold of because its that hot. If the other is close to the same the core is not clogged. But if the other is cold to the touch its clogged. You can remove the hoses and shoot garden hose water in one side or the other and break it loose usually
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