i own a 88 rx7 with n/a body with s4 T2 engine running megasquirt
but i was looking to get a little help, currently im getting no crank from starter all is good ive checked and replaced part after part and everything is getting voltage just not cranking and the only way for the starter to crank is direct feed from battery so i was wondering is there any way i can bypass everything and give starter direct feed from battery and only works by the turn of the key any help is appreciated thanks

 

Did you try cleaning all the grounds in the engine compartment and replacing the solenoid on the starter?

 

sounds like you got an open in your exciter wire

 

the thing is, unless you have the anti theft module in place, then there is already a direct feed to the starter. the + battery wire goes straight to the starter. The - goes to the strut tower and then to the starter body. Then just one wire going to the key switch. in the s5 it some times goes through an anti theft module.

 

id be guessing your ground or feed wire is fecked. Just replace it, its 20+ year old wiring these days