Mass air ECU code...
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Mass air ECU code...
Guys I got this code on my trusty little autozone ECU scanner:
212 Tach, circuit, SPOUT grounded. SPOUT circuit, open circuit
Now if I take the spout out the base timing is still at 12* and when I put the spout back in the timing is taken over by the computer, so what does this code mean to me? Is there a resistor in the engine harness that could go bad that would cause this code? I originally thought the code came up because I drove the truck with the spout out, but after realizing that the spout was in my pocket when I got home I plugged it back in and reset the computer, but I am still getting the 212 code? This is on a 92 F-150 4x4 with mass air conversion computer....
212 Tach, circuit, SPOUT grounded. SPOUT circuit, open circuit
Now if I take the spout out the base timing is still at 12* and when I put the spout back in the timing is taken over by the computer, so what does this code mean to me? Is there a resistor in the engine harness that could go bad that would cause this code? I originally thought the code came up because I drove the truck with the spout out, but after realizing that the spout was in my pocket when I got home I plugged it back in and reset the computer, but I am still getting the 212 code? This is on a 92 F-150 4x4 with mass air conversion computer....
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Very good writeup on the speed density to mass air conversion...
http://www.eecperformance.com/mafconversion.html
http://www.eecperformance.com/mafconversion.html
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My truck has occassionaly had the code 212 since I got it back in 1999. I never have been able to figure out if it is a problem or not and what is causing it. My code book says 212 means "loss of ignition diagnostic signal" and then says something about SPOUT. I thought the SPOUT was the timing advance like the old vacuum advance back in the day.
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IDM comes from the TFI module and goes to pin 4 on the EEC. Loss of this signal could be a wiring issue or bad connector, but there's also an inline resistor, and of course it could be a TFI fault. The Bible has more info and pretty pics here... Ford Fuel Injection » Wiring Harnesses
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