I finially got the battery in, when i first hooked it up i blew the main fuse, but i figured out what was wrong, fixed it, and replaced the fuse, now when i hook up the battery nothing happens, when i turn the key nothing comes on, it doesnt crank, just as if no batter was in. any ideas?

 

You didn't uh...hook the battery up BACKWARDS at first by chance, did you? Because...you are fuxored if you did.

 

ok, i figured out why it wasnt doing anything, the cable betweent eh fuse boxes wasnt there, but now it still wont crank what do i need to do???

 

bump, still cant get it to crank, i have power to the bolt on the starter, but not to the tab underneath when i turn the key.

 

check your clutch switch and the security relay behind the drivers side kick panel. or you could run a wire to a switch or button then to your starter solenoid (on the starter)

 

ive been checking everything with my multimeter, on the ignition i have 6v when i crank, at the starter cut relay i have 6v but at the clutch switch i have .7v i was thinking it should be 12v on everything, any ideas. For now i think i will run a switch.

 

Yeah pretty sure you should have 12 volts thats odd to have 6

 

battery charged fully? Check all the fuses at the driver side.

 

battery is good, i thought it was bad so i switched it with a buddies. heres an update, does not crank, but if i jump the tab to positive it cranks. fuel pump does not turn on unless i jump the pins in the diagnostic port. i do not have spark. I'll double check all the fuses. if anyone has any ideas let me know.

 

All you did was change the battery and are having these issues?

 

First of all, do you have the vehicle's schematic with you? Dont guess what voltage you will have. Different manufacturers have their own ways of setting electricity. It can be 6 Vs, 5Vs and even 12 volts or 0. It all depends if it is hardwired from a fuse thats HOT all the time, or its ecu controlled.

Therefore, I strongly suggest you find our the schematic for the battery, check it from point to point and look you suspects that way.

Dont just go by judging the voltage you get, it wont do you any good that way. Not trying to put you down or anything, this way you can trace all the problem easier instead of doing things blindfolded.

If you dont have the online schematics, i've hyperlink you one =)

1994 Mazda RX7 Workshop Manual (75MB) - http://www.wrex-racing.com/html/fd/9...hop_manual.zip

1994 Mazda RX7 Wiring Diagram(color) (30MB) - http://www.wrex-racing.com/html/fd/9...ng_diagram.zip

1994 Mazda RX7 Body Electrical Manual (18MB) - http://www.wrex-racing.com/html/fd/9...ric_manual.zip

1993(-95) Mazda RX7 Service Highlights Manual (27MB) - http://www.wrex-racing.com/docs/fd/9...highlights.pdf

and good luck to you =)

 

no, i rebuild the engine and im putting it back in now hehe.

i completely understand, im still new to this kind of stuff and any help will be appreciated.

it seems my ecu doesnt have power, its one of the corner pins that should be constant right?

 

Check the blue connector behind the passenger kick panel. Make sure you have all the other connectors are hooked up too.

 

Check the blue connector behind the passenger kick panel. Make sure you have all the other connectors are hooked up too. The cas will also cause your issues.

 

what is CAS crank angle sensor? also i double checked and all fuses are good. im considering ordering another harness as mine was pretty brittle, i would not be supprised if some wires broke that i did not notice.

 

yep CAS is the Crank Angle Sensors, theres 2 of them one white and one Grey. They are on the front of the Block behind the Main Pully. There is the Big vacuum chamber that is a bit in the way. I would just double check these plugs, make sure they are on tight, and the white one is ontop. They Tell the engine when to spark and inject fuel.

 

are you even sure the motor will fire after you get all the ignition stuff fixed?

 

well i obviously cant be sure, but it sure is hell isnt going to start without the ignition stuff fixed :P

 

are the injectors firing?