Thermactor Air System
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Thermactor Air System
[font size="1" color="#FF0000"]LAST EDITED ON 23-May-00 AT 08:09 PM (EST)[/font][p]Hello, I don't know what the heck it is, but do I have a Thermactor Air Control System (Code 44)? I got this code doing my first KOER code test, but I also got code 77 - operator error.
Thanks very much.
1988 Ford F150 351W EFI, C6.
Oh, one more thing. Can a rich or lean mixture cause an engine to run hotter then usual? Could a bad coolant sensor cause a bad mixture?
Thanks
Thanks very much.
1988 Ford F150 351W EFI, C6.
Oh, one more thing. Can a rich or lean mixture cause an engine to run hotter then usual? Could a bad coolant sensor cause a bad mixture?
Thanks
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Thermactor Air System
Katt ,
The Thermacter System basically directs fresh air via a series of hoses , valves and pipes that delivers this air to the exhaust valves . The additional air speeds the warming of the convertors so they are more efficient during the time it takes the engine to get to operating temp . I assume you checked the resistance of the coolant temp sensor like I suggested ? You have to remember that the computer will only set a fault code for a sensor that has failed to send its signal . A sensor that operates out of its range , depending on the sensor , will not always set a fault code . Yes , the coolant temp sensor out of its test range will not help adjust the fuel / air mixture . The diagnostic routine I have for code 44 states the possible causes are ... Vacuum hoses leaking , blocked or kinked , Diverter valve , thermacter pump ( air pump ) inoperative . The air management solenoids are defective or blocked .
Paul
The Thermacter System basically directs fresh air via a series of hoses , valves and pipes that delivers this air to the exhaust valves . The additional air speeds the warming of the convertors so they are more efficient during the time it takes the engine to get to operating temp . I assume you checked the resistance of the coolant temp sensor like I suggested ? You have to remember that the computer will only set a fault code for a sensor that has failed to send its signal . A sensor that operates out of its range , depending on the sensor , will not always set a fault code . Yes , the coolant temp sensor out of its test range will not help adjust the fuel / air mixture . The diagnostic routine I have for code 44 states the possible causes are ... Vacuum hoses leaking , blocked or kinked , Diverter valve , thermacter pump ( air pump ) inoperative . The air management solenoids are defective or blocked .
Paul
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Thermactor Air System
One other thing to remember about Fords and KOER tests is to make sure you are at normal engine operating temp, and you have run engine at 2000 rpm for 2 minutes before starting the running test or you may set false codes.
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Thermactor Air System
Paul, thanks for all your help! I did check the coolant temp. sensor, it's resistance after the engine has reached o/t was 33.7ohms. That seems either the engine is running way too hot or the sensor is gone, what do ya think? Im going to try and borrow a mechanical temp. gauge from a friend and see exactly what it is. I would guess it should not run hotter then 215F, as thats 20degrees over thermostat temp. Chiltons says that 177ohms is 212degrees, so I would think 33ohms is EXTREAMLY high.
Thanks again for your help!
Thanks again for your help!
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Thermactor Air System
Katt ,
Ok , my chart for both the Coolant and Air temp sensors shows at 194F the resistance should be 2.80 Ohms . Thats roughly the temp when the thermostat opens . If you got 33 ohms at normal operating temp thats the resistance if the coolant is roughly 60 deg . It still thinks the coolant is cold . Just verify coolant is reaching the sensor ...simply unscrewing the sensor a little will let some coolant leak and show you that the sensor at least immersed in coolant .
Paul
Ok , my chart for both the Coolant and Air temp sensors shows at 194F the resistance should be 2.80 Ohms . Thats roughly the temp when the thermostat opens . If you got 33 ohms at normal operating temp thats the resistance if the coolant is roughly 60 deg . It still thinks the coolant is cold . Just verify coolant is reaching the sensor ...simply unscrewing the sensor a little will let some coolant leak and show you that the sensor at least immersed in coolant .
Paul
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