Question about 1991 Ford Ranger Supercab
On my 1991 for ranger, the check engine light comes on after about 10 minutes of driving. When I shut the truck off and turn it back on, the light will come on about 5 minutes later. Could it be a thermostat problem because my temp. gauge reads low.
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Posted on Jan 02, 2017
hope this helps
Posted on Jul 02, 2008
is the coolant flowing thru the radiator check bottom hose should be same temp as top hose if not could be clouged radiator or week water pump
Posted on Jul 27, 2008
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
Posted on Oct 02, 2008
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