mnementh666 Posted April 3, 2022 Report Share Posted April 3, 2022 Found this attached with one of the hood release bracket bolts. I don't think it was connected to the dash harness. I can't find anything on the wiring diagram. Quote Link to comment
datzenmike Posted April 3, 2022 Report Share Posted April 3, 2022 521 right? Temperature sensor. Reads the cabin temp above or below 50F and allows or prevents the emissions system from applying the second set of points in the distributor which retards the timing about 4 degrees. It also requires a transmission switch, a clutch switch and the throttle position switch for closed (idle) or wide open position. 1 1 Quote Link to comment
thisismatt Posted April 3, 2022 Report Share Posted April 3, 2022 It's a thermostat switch. And now Mike beat me to it... 1 1 Quote Link to comment
thisismatt Posted April 3, 2022 Report Share Posted April 3, 2022 And no, that's not my creepy hairy hand... 3 Quote Link to comment
mnementh666 Posted April 3, 2022 Author Report Share Posted April 3, 2022 Damn you're fast, Mike. Thank you! 8 minutes ago, datzenmike said: 521 right? Temperature sensor. Reads the cabin temp above or below 50F and allows or prevents the emissions system from applying the second set of points in the distributor which retards the timing about 4 degrees. It also requires a transmission switch, a clutch switch and the throttle position switch for closed (idle) or wide open position. 6 minutes ago, thisismatt said: It's a thermostat switch. And now Mike beat me to it... And thank you too. I guess since I have no stock 4spd, no stock carb, and electronic ignition, it's safe to yard. Ha. Thank you guys! Quote Link to comment
mainer311 Posted April 3, 2022 Report Share Posted April 3, 2022 I don’t have this system anymore either, but man, I feel like there is another piece that I’ve never seen before, linked to this crazy system, just lurking somewhere in my truck. Quote Link to comment
datzenmike Posted April 3, 2022 Report Share Posted April 3, 2022 Throw all the parts to this away. When you unplug the points relay the second set become useless and the engine runs permanently on the advanced set. Quote Link to comment
datzenmike Posted April 3, 2022 Report Share Posted April 3, 2022 3 hours ago, thisismatt said: And no, that's not my creepy hairy palmed hand... Quote Link to comment
mklotz70 Posted April 3, 2022 Report Share Posted April 3, 2022 Matt....what manual/book did you get those pages from? Very nice. :) Quote Link to comment
KELMO Posted April 3, 2022 Report Share Posted April 3, 2022 ^^^Kind of looks like Nissan original parts illustration. Quote Link to comment
thisismatt Posted April 3, 2022 Report Share Posted April 3, 2022 5 hours ago, mklotz70 said: Matt....what manual/book did you get those pages from? Very nice. 🙂 The book of Google 😅 1 Quote Link to comment
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