Hi, im in the final stages of puzzling together my fd after 3,5 years on stands, where i pulled the car appart 3,5 years ago, and gone through a big breakup, house sale, depression, lost job etc etc.. and now finally putting it together again.

Ive come across a few connectors i cant pair up to their respective places, all on the wiring loom on the sparkplug side:

To start it off, we have theese two babies, one is oil pressure i presume(big yellow thing), and the other one is a what? The oil pressure sender, is it ok? Can i pair this thing up with an aftermarket oil pressure gauge and get accurate readings as long as the sender is ok?




Next up is this little round thing. Female connector, should pair up with a male pin somewhere, but who? comes out of the harness under the wireloom that goes to the dynamo:




then, we have this male connector, comes out of the harness at the same place as the previous connector. Cant find any place to hook it up:



Last up, this connector. Comes out of the harness at the back,close to the firewall and the wires going to the starter. Its a female connector, and reaches both male pins in the first picture, and none of those has a connector plugged to it...cause i dunno who goes where...

 

big one is oil pressure sender, the small one angled into the block is coolant temp. the oil pressure wire is in the loom that goes down to the starter area. the coolant temp one is on the emissions (engine) harness.

 

thanks, a few Qs answered, top pic is explained, bottom one is explained. Two mids to go then Do they go to powersteering and the AC?

 

Yep. Small round connector is to the PS pump, the white single wire connector is for the AC.

The stock oil temp gauge works just fine, but the senders have a short-ish life. There's no good reason to wire up an aftermarket gauge, if the sender doesn't work, get a new sender and you're in business.

Dale

 

if i have a decent oil temp gauge, can i wire it to the stock sender?

thanks for all the replies, im good to go tomorrow morning when i wake up

 

Nope, the sender is a strange output, the gauge won't read right.

And, you have a nice factory gauge right there in your dash by the water temp and gas quantity .

Oil pressure is just not that important on a rotary. It's important to watch when you have a freshly built engine to make sure it's all kosher, but besides that it's definitely not worthy of an aftermarket gauge. Let the stock gauge do it's job and move on to something more important.

Dale

 

Dale is correct. I used to think (being predominately a piston and Holley carb guy) that oil pressure was the critical thing. In a piston engine thats true to a greater degree.

The 3rd Gen has a poor mounting place for the oil pressure sender. It cops vibration and heat and it fails, making the factory oil pressure gauge appear to read low or zero.
Replacing the sender temporarily solves the way the gauge looks.

I've run very low on oil in a 3rd Gen before, to the point that 2 minutes away from home, going up or down a steep hill would uncover the oil pump pickup and the warning light for oil pressure would come on. I drove it home carefully and did an oil change. That engine has since covered a further 5000km and has good oil pressure, that I know of.

The rotary just isnt as vulnerable to low oil pressure as most piston engines. It doesnt have the sharp stress of connecting rods jarring up and down on the bearings. Its smoother in its bearing loading.

 

Does anyone have the color code of the wire that connects to the Oil pressure sender? My OEM harness was hacked by the previous owner and I'm not sure which wire it is. Well....I guess I could look at the FSM... ok ok..i'll look at the fsm..