87 Rx7 Turbo II


I had the car running/driving multiple times. Ran amazing. Parked it for a while. Clean the engine bay. Went to start it but the 30amp ignition fuse under dash was out. I replaced it and it started just fine. I came back this moring to try and start it and no spark again. The fuse wasnt blown this time. I have checked all my grounds and coil wires and looked everywhere for a broken/bad wire but found nothing.

I checks the resistance on my coils and they were 13.XX (.2 to 1.0 is spec)
The resistance on the cas was like .566 (110 to 210 is spec)

WTF is going on with this car!?

I noticed when the fuse went out the SAFC wouldnt turn on.... it doesnt turn on still but the fuse is good.

Why is there no spark?

 

Could it be my SAFC?


COME ON PEOPLE! HELP ME PLEASE!

 

The CAS and both coils tested good in ohms. All the fuses have voltage and are good.

HELP

 

Is it really this hard to get help around here?

 

Could it be a lifted ground somewhere? ive tried to fix this for 3 days now. Havent found anything.

 

I have no power to my ECU. Any ideas!?

 

How did you find this out? Did you check pin 3I( 12 volts with key to on) at the ECU?

 

I checked 3I which is the main relay and i checked 3J which is battery. I checked both with the key on and got like .157v.

 

Does your main relay click with the key to on? One way to make certain it clicks is to remove the "two wire plug" from the main relay with the key to on and as the plug is removed the relay should click and also click when reconnecting the plug as well.

 

The main relay is a 5 wire correct? I dont know if my main relay is connected to the chassis anymore. Anyone got a pic of what it looks like?

I thought i had the main relay.... yellow bottom, black top, 5 prong with 3 on top and 2 on bottom, use to be attached to steering colum?

 

You described the "circuit opening relay." The main relay is located by the trailing coil and has two plugs, one with four wires and the other with two wires.

Pic of relay https://www.rx7club.com/2nd-generation-specific-1986-1992-17/t2-swap-wiring-issue-negative-terminal-hot-temp-guage-hot-892461/
post #21

 

Yes the main relay is working. I can hear it click. I also tried the one off my other car. Neither changed anything.

 

The four wire plug of the main relay has a B/W wire which receives voltage from the W/L wire. The W/L wire comes from the engine fuse box and always has voltage. Check this wire for voltage for it should have battery voltage. Also, when the key is to on and the relay clicks the relay passes the voltage from the W/L wire to the B/W wire so with the key to on check for voltage on the B/W wire.

EDIT: The W/L wire comes from a 30 amp fuse in the engine bay fuse box.

 

Thanks bro! That lead to the problem! The other end of the W/L wire wasnt connected to the fuse block. Problem is fixed. KUDO's to satch!

 

I have ......created fire!

 

Hell you created the wheel!