Quote:
Originally Posted by ps2cho
How would I test the air flow potentiometer? In the M103, I know there is an electrical connector that goes to the pot, but what does that control? I thought there was no traditional potentiometer on this engine...
Also does the M103 have a TPS?
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You can check the potentiometer through the instructions detailed on this site:
http://sg-motorsports.com/AFS%20Pot%20write-up.htm
Mine was bad, and I had to replace the whole air flow sensor though because I couldn't find the potentiometer separately. It solved my idling issues but my misfiring issues were resolved through other means. I had to do new plugs / wires / rotor / cap, EZL ignition module (pulling the vacuum line on it, you should be able to hear the air flow), and the last piece was my #5 injector was a little loose and that cylinder was choking up. Found that by pulling all plugs and then realized that the injector was loose.
Don't think the M103 has a TPS, but there is a microswitch for idle. You can see it with the air cleaner off, towards the firewall. $25 cheap replacement. This is more for controlling idle speed rather than any misfiring issues though I think...
Good luck.