My 2004 Mazda RX-8 doesn’t start?

well my rx-8 doesnt want to turn on anymore, i try everything i can think of. It was previously salvaged, i got it in a insurance auction, it had major hail damage, it broke both the windshield front and back, when i brought it, it need a jump start to turn it on, it work for a couple of week, but then i was going to turn it on, it doesnt work, noting work, i can’t open my trunk with the key anymore it like it lock itself out? not even the light turn on, so i thought i need to get a jump start, so i turn but nonetheless it doesnt turn on, i thought it need gas, so i fill the tank 1/4 gallon, but didnt do crap, so i thought it was the battery went bad, so i went the store to buy a new battery, i install the new battery in my car but guess what it didnt do noting, im kinda running out of option, i dont know if it happen to other rx-8 but i need help, can anyone help with my situation, PLEASE AND THANK YOU!!!!

You’re going to have to be much more specific with its EXACT behavior. I have a 3-rotor RX-7 and understand rotaries inside and out, but &quot:it don’t turn on&quot: doesn’t tell me anything at all. Here is a list of items you should have done BEFORE buying a battery.

1: Hook up a multimeter ($4 at Harbor Freight, set it to volts) to the battery and read its voltage. With ignition OFF, or ignition ON (engine not running), it should read 12.6 volts. Anything lower and it needs to be charged. When cranking the engine, it should be above 10 volts. When running, it needs to be 13.5-14.8 volts.

2: The only batteries I would ever use in a rotary car is either an Optima or Deka Intimidator AGM-type. Normal parts store batteries are junk and a rotary will destroy it just like any other attempt to cheap out on parts. My RX-7 destroyed two autozone batteries within a year. Now I have a Deka Intimidator, per recommendation of RX7club administrator Aaron Cake and it is awesome!.

3: Are ALL circuits completely dead? As in headlights, taillights, hazard lights, stereo, starter, etc? To get to the root of the problem, I need to know what circuits work and what ones don’t. If everything is unresponsive and your battery has sufficient charge, your battery cables and/or their connections are the item I would suspect. This is common on the FC (86-91 RX7), but is easily fixed with a wire wheel and dielectric grease.

Based on the information you have provided, the best I could suggest is that either you have a dead short, corrosion on one or more battery cable terminals or the problem is deeper. If you want a hand diagnosing it, IM me on yahoo IM, same username.

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