may be a long post
Small recap- finally got some time to work on the car
after fixing a vacuum line, and wiring to the fuel pump resistor

1)before starting it, i also found this and fixed another wire which id would like to know what it goes to, its below and between the spark plugs

2)After making sure everything was put together i setup the Banzai starter relay i got, but for some reason im having trouble understanding the instructions
so i set it up before and would like to know if this is correct.


After disconnecting the the relay. Moment of truth
I started the car.

AFTER 8 YEARS IT STARTED!!
it continues to start(after click click start) and idle smoothly when it warms up

 

The first picture you are showing is the oil pressure sensor, if that's disconnected you won't see any oil pressure on the gauge on the dash.

Looks like the starter booster is hooked up right, it's a very basic circuit and there's really only one way to hook it up.

Congrats on getting it running!

Dale

 

 

Good thing i fixed it then.
is it actual oil pressure or is it one of those that just reads that there is?

Awesome!
@silver i just didnt have it connected when i started the car because i just aasnt sure if i had conneced it correctly
but Dale said its good so ill be hooking it back up

 

Congrats on getting it running!

The oil pressure gauge on RX-7s are notoriously inaccurate. If you think of it like an idiot light with a needle you're not far off. I'm thinking about how I want to tackle that particular demon myself. I'm willing to bet that there is some documentation somewhere on how to plumb in a GM or other inexpensive yet reasonably accurate oil pressure sensor that can be used with an arbitrary gauge. I'm thinking along the lines of a few LEDs for low, normal, high pressures run by some kind of PIC. Perhaps an Arduino. Flash the crap out of them if pressure gets to dangerously low levels while the engine is running. That kind of thing. A smarter idiot light if you will.

 

Get the sender plugged in, at the least it should read SOMETHING.

If the readings are erratic or bad, a new sender isn't that much, I think $80 or something new from Mazda. People have looked into retrofitting other sensors but the stock one has a wide range since the FD runs a lot of oil pressure and many standard piston engine sensors don't read high enough. In other words it's a big engineering project to run a different sender, the stock one is cheap and plugs right in. I replaced mine about 10 years ago and it's still going strong.

Oh, and it is a real gauge, not an idiot light. You should see about 30 psi at idle and 60 psi at 3000 RPM, that is normal.

Dale

 

I have been seeing 30 at idle and 60 if i rev it
but i have also seen it drop to 0 and then back once or twice. Mainly on start up but then works normally

 

Yep, that's normal for a so-so oil pressure sender. Sounds like the oil pressure is fine.

I would put this way down the list of things to fix, you probably have more important things the car needs right now. That's just an annoyance.

Dale

 

As far as the list of things to do, i feel its mainly cosmetics
and a clean out coolant system with a cleaner till it finally comes out really clean

Ive taken out the car for its first test drive it all feels fine
To me at least. No staggering no loss of power etc

Because its been sitting, would it be better to just take it to a specific shop and have them give me a list on what needs work?

 

Depends on your mechanical skill. Most things you can tell yourself - if the tires are bald, get tires. Brakes are noisy or squealing, plan on a brake job. Probably needs all the fluids replaced.

Dale

 

Well i guess ill just have to learn all this stuff
Anyways
thanks for the help so far

 

The good news is that none of this is particularly difficult or hard to get to, unlike modern cars. There are plenty of people around like Dale that are a wealth of knowledge. I need to dust the cobwebs off but I'll be back up to snuff soon.