Hi everyone this is my first post on h-t but iv been lurking around for awhile now and im in the process of a turbo install and run into a little problem with the safeguard.
heres some info on the car.

1993 civic 4dr lx ,b18b with a s1 tranny
450cc dsms and walbro 255hp pump
p75 chipped running crome
ebay cast manifold and 14b turbo
fmic.

ok so i hooked the unit up as per instructions for the input #1 and output #2 (cut and splice icm wire A21 green/red) and it starts and runs fine for about thirty seconds then engine starts to hiccup and the tach starts jumping around and the timing just starts retarding intill it wont rev past 2500 rpm. iv talked to john at j&s and hes not really sure on what it is and i was hopping to maybe have some luck on here trying to figure this out.
thanks

 

I have never used a j&s unit, however if the car is properly tuned, there is no need for a piggyback safegaurd.