interesting MAF voltage
interesting MAF voltage
for some reason i am getting 9.21 volts off my MAF output havnt checked the FSM yet but would anyone know y this would be and no the wires are not mixed around cause my input is getting about 12 volts please help? think it is toast?
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float_6969
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biosehnsucht
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the MAF's power is supplied by the ECU - it should be approx 5V.
if you have it connected to as 12V source for power someplace, that could cause your voltage to scale too high, it can also damage the ECU. don't know if it'll damage the MAF or not, I think it works as a resistance circuit so as long as the current and voltage don't melt anything it'll probably not be damaged. If the ECU itself is putting out 12V then its already damaged, and the problem.
if you have it connected to as 12V source for power someplace, that could cause your voltage to scale too high, it can also damage the ECU. don't know if it'll damage the MAF or not, I think it works as a resistance circuit so as long as the current and voltage don't melt anything it'll probably not be damaged. If the ECU itself is putting out 12V then its already damaged, and the problem.
Re: (biosehnsucht)
ok its prolly just hte ecu then yeah i thought i may have fried it but wasnt sure, ill just hook up my other one then, but the reason i switched was to see if it made a dif cause with the one that works i dont get a stable idle and i can smell unburned fuel but my a/f is not running rich and my ecu is not changing loops, its stay constant, not scanning back and forth any ideas? and if i let of the gas it idles way down to a bout 300 then pops back up to about 700 tops and jumps up and down. just replaced the temp sensor last night didnt help and the maf is to spec when hooked up to other ecu any ideas?
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biosehnsucht
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what sort of wiring harness work was done, you might want to double check all the sensor connections get power where they should and connect where they should..
if you look on my site here I have the diagram in one big image, or you can DL the FSM from the stickies and print out the pages there (handier for actual work)
if you look on my site here I have the diagram in one big image, or you can DL the FSM from the stickies and print out the pages there (handier for actual work)
Re: (biosehnsucht)
ok maf is fine with new ecu just getting one more code insteat of 5 and the temp sensor did help a lot actually i thnk the code was 43 but may have been 34 cant remember is the only one still im assuming its the ignition one, work on that tomorrow