mallory hyfire VI problem

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

THE LEGEND · 10-30-2011, 08:13 PM

Don't think that coil is compatible with that box.
Chip

R. Thorne · 10-30-2011, 09:20 PM

Thanks, guys. Primary ohms resistance is .7 on msd coil and .6 on "recommended" Mallory coil, so I don't think that is the issue. Will check cap as suggested and try another set of wires also. Tach worked fine with MSD last week. Is the Mallory that much more "powerful" than the MSD? Also, per Mallory instructions "do not ground to engine block, ground to frame or chassis". MSD says ground to negative terminal of battery or engine block. Thanks, Ron.

randy wilson · 11-09-2011, 10:18 AM

He's right, coil is not right for the box. Get mallory's coil, and all will be fine. We have ran one for seven years.

fredjohnston · 11-09-2011, 08:01 PM

I fought this problem with the same box. Mallory insisted there was something in the car causing it. After I made them send me a replacement, the problem went away.

R. Thorne · 11-10-2011, 08:40 PM

Thanks, guys for suggestions. Tried all, and then some, no difference. It is going back to Mallory. FYI, Mallory tech line is a joke. Sam at centuryperformance is the person to go to on Mallory tech problems. Ron.

Ryan Horensky · 11-14-2011, 12:38 AM

I had a similar problem. We have Hyfire 6 boxes in both our cars. I bought one in 2006 at Maple Grove and had zero problems with it in 5 years. We had our Crane box go bad in the other car and replaced it with a Hyfire 6. Third time was a charm. I had to send back two boxes that were bad. It may be possible that Mallory had a bad run of boxes. The last one they sent me works fine. It was needless to say a long season dealing with bad electronics.

Ryan

10-29-2011, 10:21 AM	#1
R. Thorne Member Join Date: May 2009 Posts: 182 Likes: 66 Liked 100 Times in 33 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

10-30-2011, 08:13 PM	#2
THE LEGEND VIP Member Join Date: Aug 2002 Location: Fayetteville, n.c. Posts: 1,411 Likes: 0 Liked 1 Time in 1 Post	Re: mallory hyfire VI problem Don't think that coil is compatible with that box. Chip

10-30-2011, 09:20 PM	#3
R. Thorne Member Join Date: May 2009 Posts: 182 Likes: 66 Liked 100 Times in 33 Posts	Re: mallory hyfire VI problem Thanks, guys. Primary ohms resistance is .7 on msd coil and .6 on "recommended" Mallory coil, so I don't think that is the issue. Will check cap as suggested and try another set of wires also. Tach worked fine with MSD last week. Is the Mallory that much more "powerful" than the MSD? Also, per Mallory instructions "do not ground to engine block, ground to frame or chassis". MSD says ground to negative terminal of battery or engine block. Thanks, Ron.

11-09-2011, 10:18 AM	#4
randy wilson Senior Member Join Date: Jan 2007 Location: N/A Posts: 882 Likes: 0 Liked 22 Times in 22 Posts	Re: mallory hyfire VI problem He's right, coil is not right for the box. Get mallory's coil, and all will be fine. We have ran one for seven years. __________________ don,t have one

11-09-2011, 08:01 PM	#5
fredjohnston Member Join Date: Jul 2007 Posts: 341 Likes: 0 Liked 55 Times in 14 Posts	Re: mallory hyfire VI problem I fought this problem with the same box. Mallory insisted there was something in the car causing it. After I made them send me a replacement, the problem went away.

11-10-2011, 08:40 PM	#6
R. Thorne Member Join Date: May 2009 Posts: 182 Likes: 66 Liked 100 Times in 33 Posts	Re: mallory hyfire VI problem Thanks, guys for suggestions. Tried all, and then some, no difference. It is going back to Mallory. FYI, Mallory tech line is a joke. Sam at centuryperformance is the person to go to on Mallory tech problems. Ron.

11-14-2011, 12:38 AM	#7
Ryan Horensky Member Join Date: Sep 2002 Location: Sugarloaf,PA Posts: 201 Likes: 19 Liked 109 Times in 18 Posts	Re: mallory hyfire VI problem I had a similar problem. We have Hyfire 6 boxes in both our cars. I bought one in 2006 at Maple Grove and had zero problems with it in 5 years. We had our Crane box go bad in the other car and replaced it with a Hyfire 6. Third time was a charm. I had to send back two boxes that were bad. It may be possible that Mallory had a bad run of boxes. The last one they sent me works fine. It was needless to say a long season dealing with bad electronics. Ryan