You must buy a battery with an external vent connection due to the fact the battery is stored in the trunk. The size is determined by the year of your vehicle. Any auto parts store can help you find the right battery.
you could have a bad ground wire that was my problem
To run, no. To pass emissions, yes.
The 89 is an s5 and the 87 is an s4 It will fit but might take minor modification.
Anything will work as long as you have enough money. There have been LS7 swaps into newer RX7's but i'm not sure about an 87.
fordparts.com shows the battery group size as being ( 56 )
I have an 87 7mge non turbo and i beat my buddies 89 rx7 with a 13b and webber side drafts
It depends on how many lugs there are. If they areboth 5 lug than it will fit. If the 87 is 4 lug then you would have to change the hubs to 5 lug.
Theres no such thing as size 87
It could be a few things that cause that. One is the main fuse could be bad, or the battery cables coming from the battery connecting to the engine controlls could have a loose connection or be corroded. If those are not the problem, you might have to trace the power wire from the battery through out the car to make sure everything is in good condition. Also, check to make sure the battery is the proper size for the car, each car has a battery that produces the proper cranking amps. You can find this information in the owners book or if you have one, in the car repair manual or if it is still there, the sticker under the hood, or near the battery area.
Sounds like a dud fuel pump to me. Check all the wires first . Funny though , 87 rx7 had no carburetor...it has electronic fuel injection.
Usually on the Negative terminal of the battery.
No battery.