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R. Thorne · 10-29-2011, 10:21 AM

Took out msd 6a and installed #685 mallory box. Now tach (3905 autometer) bounces and doesnt read properly. 2 calls to mallory tech with little help. One said had to have their coil and tach adapter(what a surprise), other said shouldnt need them. One tech said to hook to negative side of coil directly (instead of tach output on box) but autometer says not to. coil is 8202 msd blaster 2. distributor is stock gm breaker point. Any ideas or suggestions appreciated. Thanks, Ron

10-29-2011, 10:21 AM	#1
R. Thorne Member Join Date: May 2009 Posts: 183 Likes: 66 Liked 101 Times in 34 Posts	mallory hyfire VI problem Took out msd 6a and installed #685 mallory box. Now tach (3905 autometer) bounces and doesnt read properly. 2 calls to mallory tech with little help. One said had to have their coil and tach adapter(what a surprise), other said shouldnt need them. One tech said to hook to negative side of coil directly (instead of tach output on box) but autometer says not to. coil is 8202 msd blaster 2. distributor is stock gm breaker point. Any ideas or suggestions appreciated. Thanks, Ron