what ignition coils have the best results on the 1988 Rx7 GTU NA?

 

Unless your stockers are faulty, I would leave them, they are a pretty beefy system. Ignition parts get costly, fast. i'm pretty sure you'll be hard pressed to tap out the ignition on an N/A. But that is my opinion.

 

stock are fine. you won't make enough horsepower to need to upgrade them.

 

i just think mine are goin bad. i have a somewhat incosistent idle and it like to cut out sometime while driving. idle likes to bounce between 1000-1500.

 

Your probable cheapest option for a better ignition set up is adding some sort of "booster ignition box".
Msd, jacob, fc1000/2000/3000, crane cams etc etc.

 

+1 for the ignition box, if your idle is bad, there are a million and one reasons on an FC, check vaccum first! search for "bouncing Idle" also check the 4 engine bay grounds, make sure they are clean and in proper order. Also check the tps, that is a big one for a bad idle and not so smoth accel. Best of luck!

P.S. almost forgot, check fuel pump wiring, you may need to rewire it, or use a boost-a-pump to get proper voltage.

 

-Vacuum leaks
-TPS maladjustment
-grounds
-loose battery cable

In that order.

Don't assume the coils are automatically bad, because they are actually quite reliable and almost never fail.

 

ok well i went home and checked all my wiring to the ignition coils and they all have voltage accoreding to my ohms meter.

i found what looks to be a ground on the firewall close to the charcoal canister. it doesnt have anything hooked up to it.

what is supposed to go to this ground?