went to dyno to tune the car but ignition starts breaking up at 7000 rpm, im using a modified microtech lt10s 12000rpm 45 lbs map sensor with the x4 box and msd 8207 blaster coils, tuner sugested that maybe the x4 box can keep up with the msd coils, and that i should swap the msd coils to 4 fc trailing coils. My question is can i use the x4 box with 2 msd dis-2 boxes to fire the msd coils or i should just change my coils to 4 trailing.

 

how much power you making?

 

i wasnt able to get a full boost run but i got 319hp at 11 lbs.

 

so its not building full boost till 7000rpm?

i would get rid of the msd **** and put the x4 box and 4 mazda trailing coil packs. Tested till 550rwhp no worries and even more with an accuvolt.

 

Thanks i will try that, im already trying to get 2 moretrailing coils

 

well i finally swap to 4 trailing coils and now im having another problem, the cars seams as if is breaking up from 3000 rpm to 5000 rpm but once it goes in to boost it responds fine, could it be just tunning, also i removed the spark plugs and the front trailing and leading are way darker than the rear, so i decide to check for ignition and hookup the timing light to all spark plug wires and i get the timing light to get signal from l2 and t2 but the light doesnt flash on l1 or t1, but when i removed the wires from the coils there is spark on the coils, so i decide to check the spark plug wires and there is spark to all 4 spark plugs but i still dont get the timing light to flash on l1 or t1, i swap cas and still no flash on the timing light, also with the ignition on i get 12 volts on negative and positive side of the coils, shouldnt the negative side signal from the x4 box to the coils flashing signal.