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Found 3 results

  1. I replaced the drive belts on my early 71 Z about a month ago. I also replaced the alternator with that of a 280z. After this, my oil pressure gauge stopped working outright. Even after driving it for a bit, it does not move at all. The engine temperature is reading. Just trying to rule out the problem, I bought a new oil pressure sensor, and now I can't locate where the old one is. Any help would be appreciated. I have a general idea of where things are in the engine from my repair manual.
  2. Specs: 1977 Datsun 280z, 4/77 L28 Engine, everything original / stock Oil change 100 miles ago - 4 qts of 10w30, new oil filter Issue: For a few days now, i'm noticing that the Oil Pressure gauge shows the oil pressure dropping from ~40 psi down to ~5 psi over the course of 15mins of variable speed /rpm driving. Engine is sounding less smooth, running a touch rougher at idle. After reading previous threads, it looks like there's a few things i need to check first: 1) Check oil w/ a mechanical pressure gauge 2a) If mechanical gauge matches readings with stock electrical Oil Pressure gauge, then look at Oil Pressure Relief Valve to see if it's functioning. 2b) If mech gauge doesn't match electrical gauge, replace Oil Pressure Gauge Sensor Questions: 1) How / where do i connect a mechanical gauge to the engine? from same port as the Oil Pressure Gauge Sensor? 2) I'm noticing a lot of people mentioning a Oil Pressure Sending Unit often fails, but I don't see that part in the Service Manual - or haven't found a picture of one. What are they referring to? Isolation: 1) Engine does not cut out when Oil Pressure gauge shows what should be 0 psi Thanks in advance!
  3. This is probably a DUMB question but.... I'm replacing all my gauges with Speedhut gauges to include their oil pressure and coolant temp units. I see from the FSM that both of the stock sending units go to the EFI control unit. Also, the new units require the use of their sending units. So... 1. Will the elimination of the stock sending units for oil and temp cause a problem with the fuel EFI control? 2. If I use Speedhut's sending units, which must be of different current and/r resistance than stock, be OK? 3. Do I need to keep the stock senders in place and ADD the new ones just for the gauges? If yes, does anyone have any recommendations on the best way to do so? Sorry for the multiple questions. I found many related threads but none touched on this issue. Thanks!!
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