'85 13b woes.

Thatdavidkid · 10-11-2012, 09:06 PM

Ok so I finally got a key made for my 85 rx7, and got a battery. The engine turns over and has compression. Not getting spark at this time, I found a wiring diagram and according to it, my coils are wired backwards. The black wire/yellow stripe which is the larger gauge wire is on the negative side of my coils. This is wrong, correct? Also, the plug wires were all wrong. One coil is a msd blaster 2, the other appears stock. Which should I wore as primary? Also, there is a variable resistor on the passenger side which looks to be adjustable with a flat head. What is it? Is it possible to post pictures directly from my iPhone?

Thatdavidkid · 10-12-2012, 03:07 PM

Nothing at all? Can somebody direct me to a more tech friendly rx7 site where I may be able to find some Info?

fc nut · 10-19-2012, 06:56 AM

you're in the right site. the thicker wire is the positive.wire the msd coil as the leading coil,as far as the thing you call a resistor,it's the fuel adjuster screw. I wouldn't touch it,unless someone has it out of adjustment,it adjusts air/fuel mixture. keep me posted if you have any more issues.

Thatdavidkid · 10-22-2012, 01:44 AM

Ok I re wired the coils, fixed the firing order and nothing. After some searching, I found that the ignition module was removed for installation of the msd box and never put back in after removing the msd box. I will try to wire in a procomp ignition box to keep costs down. If it fires up and runs, ill order an ignition module

fc nut · 10-31-2012, 06:38 PM

looks like you have things under control. i hate it when you get a car that someone thought they knew what they're doing. some people need to stay away from cars. feel free to post pics of your build.

10-11-2012, 09:06 PM	#1
Thatdavidkid The Newbie Join Date: Sep 2012 Location: Denton iTrader: (0) Posts: 5 Rep Power: 0	'85 13b woes. Ok so I finally got a key made for my 85 rx7, and got a battery. The engine turns over and has compression. Not getting spark at this time, I found a wiring diagram and according to it, my coils are wired backwards. The black wire/yellow stripe which is the larger gauge wire is on the negative side of my coils. This is wrong, correct? Also, the plug wires were all wrong. One coil is a msd blaster 2, the other appears stock. Which should I wore as primary? Also, there is a variable resistor on the passenger side which looks to be adjustable with a flat head. What is it? Is it possible to post pictures directly from my iPhone?

10-19-2012, 06:56 AM	#3
fc nut member Join Date: Jun 2008 Location: Lebanon,Ohio iTrader: (0) Posts: 282 Rep Power: 17	you're in the right site. the thicker wire is the positive.wire the msd coil as the leading coil,as far as the thing you call a resistor,it's the fuel adjuster screw. I wouldn't touch it,unless someone has it out of adjustment,it adjusts air/fuel mixture. keep me posted if you have any more issues. __________________ leaving my carbon footprint....one start up at a time

10-31-2012, 06:38 PM	#5
fc nut member Join Date: Jun 2008 Location: Lebanon,Ohio iTrader: (0) Posts: 282 Rep Power: 17	looks like you have things under control. i hate it when you get a car that someone thought they knew what they're doing. some people need to stay away from cars. feel free to post pics of your build. __________________ leaving my carbon footprint....one start up at a time

10-12-2012, 03:07 PM	#2
Thatdavidkid The Newbie Join Date: Sep 2012 Location: Denton iTrader: (0) Posts: 5 Rep Power: 0	Nothing at all? Can somebody direct me to a more tech friendly rx7 site where I may be able to find some Info?

10-22-2012, 01:44 AM	#4
Thatdavidkid The Newbie Join Date: Sep 2012 Location: Denton iTrader: (0) Posts: 5 Rep Power: 0	Ok I re wired the coils, fixed the firing order and nothing. After some searching, I found that the ignition module was removed for installation of the msd box and never put back in after removing the msd box. I will try to wire in a procomp ignition box to keep costs down. If it fires up and runs, ill order an ignition module