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Old 03-25-2007, 03:51 PM   #1
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Hi all! Another noob here. In my curiosity I kinda destroyed the afm for my 1.6l miata.... and I was kinda wondering if I could just plug and play a 1.8l's AFM into it without many problems.... I am assuming its my broken AFM that is keeping my car from starting... I can hear everything firing and turning over just no true ignition.
help
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Old 03-25-2007, 03:57 PM   #2
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no 1.8 is inverse voltage get a NA rx7 AFM. off ebay for 40-50 bucks. Yes AFM has a FP controll relay in it.
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Old 03-25-2007, 04:05 PM   #3
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thank you very much. haha I don't really know what the FP control relay is (fuel pressure relay? so I am not getting any fuel with my broken afm?) but I trust it is the reason why it's not starting.
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Old 03-25-2007, 04:10 PM   #4
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sure is. you can just take off the black plastic top and make contact with the little metal strip on the other metal strip if you want the pump to be constant on with the ignition key cut back the longer strip so it wont be held back by the arm.
http://members.aol.com/solomiata/index.html this site will help you with pics as well.
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Old 03-25-2007, 04:18 PM   #5
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You will find this to be impossible as the 1.8 cars meter air through a hotwire MAF sensor--Not the same thing as a AFM.

There are 2 different circuits which trigger the fuel pump. 1 is activated when you turn the key to start. That circuit is opened when you release the key and it goes to the run position. The 2nd circuit goes through the AFM, and completes when the AFM flapper door is opened. You can jump this circuit at the diagnostic box and putting a wire or paperclip between FP and GND. If your diagnosis is correct, the car would start and run--but probably not very well.
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Old 03-25-2007, 04:53 PM   #6
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if had mine jumpered at the AFM for months now no ill effects yet all it does is cut juice to the FP.
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Old 03-27-2007, 02:41 AM   #7
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thank ya very much! info much appreciated.
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Old 03-27-2007, 02:46 AM   #8
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trying to get an afm off here now.
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Old 03-27-2007, 02:52 AM   #9
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If you get desperate, let me know. I have a spare one sitting around that I was going to experiment with, but I might be willing to let it go.
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