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msd 6al to dig 6 now breaking up HELP #307368 05/04/09 11:05 AM 05/04/09 11:05 AM
Joined: Jan 2004 Posts: 550 Ma Voluster OP mopar
Voluster OP mopar Joined: Jan 2004 Posts: 550 Ma	Swapped my 6 al to a digital 6 and now the car breaks up around 3500rpm popping thru the carb and exhaust I check the timing after the box swap and was advanced to 45 so I brought it back down to the 34 I normally run. only thing I did was swap boxes everything was fine with the 6 al it is powered and grounded at the battery The pick up wires for the distributor is in the same spot with nothing around it I had the same problem with 8975 retard with the 6 al removed that and put a dial style retard in and problem went away I Wire remote starts and stereos for a living so it's not my 1st time around wiring Any Ideas? Thanks Phil

Re: msd 6al to dig 6 now breaking up HELP [Re: Voluster] #307369 05/04/09 11:29 AM 05/04/09 11:29 AM
Joined: Jun 2004 Posts: 1,217 Wellington, FL C cudabunch pro stock
cudabunch pro stock C Joined: Jun 2004 Posts: 1,217 Wellington, FL	Did you cut the green loop wire and seal it? Check the dials to see if one is on at the rpm that its breaking up at? Check the coil.

Re: msd 6al to dig 6 now breaking up HELP [Re: cudabunch] #307370 05/04/09 11:47 AM 05/04/09 11:47 AM
Joined: Jan 2004 Posts: 550 Ma Voluster OP mopar
Voluster OP mopar Joined: Jan 2004 Posts: 550 Ma	I'm pretty sure the green loop is cut. But I'm gonna double check that after work Car ran fine with the 6 al I called MSD they told me to check the ohms on the plug wires. only thing I changed was the box

Re: msd 6al to dig 6 now breaking up HELP [Re: Voluster] #307371 05/04/09 12:11 PM 05/04/09 12:11 PM
Joined: Jun 2004 Posts: 1,217 Wellington, FL C cudabunch pro stock
cudabunch pro stock C Joined: Jun 2004 Posts: 1,217 Wellington, FL	The only other things I can think of are low voltage on battery timming gun ( adjustable?)Why was it at 45 degrees? Is the retard being used? Good luck

Re: msd 6al to dig 6 now breaking up HELP [Re: cudabunch] #307372 05/04/09 12:16 PM 05/04/09 12:16 PM
Joined: Jan 2004 Posts: 550 Ma Voluster OP mopar
Voluster OP mopar Joined: Jan 2004 Posts: 550 Ma	Battery voltage is there. 13.5 running The retard is not being used at the moment and the rev limit is set to 6800 and the 2 step is 0 the timing changed when changing boxes. Msd said that was common to see it 6-8 degrees difference in the boxes I put it back to 34 when I checked the timming

Re: msd 6al to dig 6 now breaking up HELP [Re: Voluster] #307373 05/04/09 12:18 PM 05/04/09 12:18 PM
Joined: Oct 2003 Posts: 842 Baltimore,MD Bill_LBSR super stock
Bill_LBSR super stock Joined: Oct 2003 Posts: 842 Baltimore,MD	Try switching the distributor pick up wires. I had this same problem going from a 7AL-3 to a Digital 7. When you switch from an analog box to a digital box the pick up wires need to be switched. After you switch the wires, reset the timing. LBSR

Re: msd 6al to dig 6 now breaking up HELP [Re: Bill_LBSR] #307374 05/04/09 12:23 PM 05/04/09 12:23 PM
Joined: Jan 2003 Posts: 5,406 Diego-Town, CA Diego_Ted master
Diego_Ted master Joined: Jan 2003 Posts: 5,406 Diego-Town, CA	I had the same problem and never could figure it out and I tried everything. The two things to check first is electrical interference and low voltage, assuming all your wiring is correct. The Digi box does not like a lot of electrical accessories and I was running them all, fans, pumps, ect. The shielded wires did not seem to help me? Ted

Re: msd 6al to dig 6 now breaking up HELP [Re: Diego_Ted] #307375 05/04/09 12:36 PM 05/04/09 12:36 PM
Joined: Jun 2004 Posts: 1,217 Wellington, FL C cudabunch pro stock
cudabunch pro stock C Joined: Jun 2004 Posts: 1,217 Wellington, FL	Ted has a good point,I ran my wires to the coil on the pass side of car and a shielded wire on the drivers side to the dist. to keep them away from each other.

Re: msd 6al to dig 6 now breaking up HELP [Re: Diego_Ted] #307376 05/04/09 12:43 PM 05/04/09 12:43 PM
Joined: Jan 2003 Posts: 2,567 Appalachia RedRam master
RedRam master Joined: Jan 2003 Posts: 2,567 Appalachia	Mine worked great in my 85 w/493, wrecked it. Put the digi 6 in my 87 while it still had the /6 in it, worked great. Put the 500 in the 87 and like you, I had a missfire above 3,500 rpm or so. Checked everything, sheilded everything and rewired everything, no help. Noticed that when it would mis that the tach was jumpy. hmmm One day out for a cruise I forgot to turn on the elec fan, flipped the switch and the tach started jumpin. hmmm turned off all of the electrics and bam, no missfire. Went to a 136amp denso alt and all is good.

Re: msd 6al to dig 6 now breaking up HELP [Re: RedRam] #307377 05/04/09 12:54 PM 05/04/09 12:54 PM
Joined: Mar 2003 Posts: 15,491 the boonies aarcuda I Live Here
aarcuda I Live Here Joined: Mar 2003 Posts: 15,491 the boonies	electrical noise can mess you up with digital signals.

Re: msd 6al to dig 6 now breaking up HELP [Re: aarcuda] #307378 05/04/09 08:32 PM 05/04/09 08:32 PM
Joined: Jan 2004 Posts: 550 Ma Voluster OP mopar
Voluster OP mopar Joined: Jan 2004 Posts: 550 Ma	Went and ohmed my wires I have one that is more then the others I replaced the pick up moved the pick up wires away as far as I could Made sure the green loop was cut Swapped the pick up wires No dice on any of them Still breaking up

Re: msd 6al to dig 6 now breaking up HELP [Re: Voluster] #307379 05/04/09 09:40 PM 05/04/09 09:40 PM
Joined: Dec 2008 Posts: 415 Peru cbarracuda mopar
cbarracuda mopar Joined: Dec 2008 Posts: 415 Peru	Quote: Went and ohmed my wires I have one that is more then the others I replaced the pick up moved the pick up wires away as far as I could Made sure the green loop was cut Swapped the pick up wires No dice on any of them Still breaking up Double reluctor air cap whith dig ignition

Re: msd 6al to dig 6 now breaking up HELP [Re: cbarracuda] #307380 05/05/09 08:10 AM 05/05/09 08:10 AM
Joined: Jan 2004 Posts: 550 Ma Voluster OP mopar
Voluster OP mopar Joined: Jan 2004 Posts: 550 Ma	Double reluctor air cap whith dig ignition can't do that it's pretty much fixed The pick up only goes in one way and you can't open the gap up any more

Re: msd 6al to dig 6 now breaking up HELP [Re: Voluster] #307381 05/05/09 08:27 AM 05/05/09 08:27 AM
Joined: Mar 2005 Posts: 1,581 N/E, Michigan RATTRAP pro stock
RATTRAP pro stock Joined: Mar 2005 Posts: 1,581 N/E, Michigan	I had one the rev limiter was stuck @ around 4000rpm went back to my 6al and no more problems, The digital 6 is junk IMO

Re: msd 6al to dig 6 now breaking up HELP [Re: RATTRAP] #307382 05/05/09 09:51 AM 05/05/09 09:51 AM
Joined: Apr 2005 Posts: 1,106 Quebec, Canada D Diablo super stock
Diablo super stock D Joined: Apr 2005 Posts: 1,106 Quebec, Canada	how much work it be to swap back to the 6L just to make sure it is the box...... Have you been welding on or around the car lately? DO any of your close buddies have a digital 6 you could swap with. maybe it is the box. I had a digital 6 come to be with a similar problem. had to send it back

Re: msd 6al to dig 6 now breaking up HELP [Re: Diablo] #307383 05/05/09 04:07 PM 05/05/09 04:07 PM
Joined: Jan 2003 Posts: 10,766 Central Valley, CA. Quicksilver440 I Live Here
Quicksilver440 I Live Here Joined: Jan 2003 Posts: 10,766 Central Valley, CA.	Have you checked your voltage to your box (with everything else turned on too)? I have had a digital 6 for several years now with zero problems. Electric fan, electric water pump, elec fuel pumps, the whole shabang...never a single problem....but I also have a 140 amp alt (80 amps at idle). Could it maybe be the digital is more sensitive to voltage drop than the old 6al? just an idea...

Re: msd 6al to dig 6 now breaking up HELP [Re: Quicksilver440] #307384 05/05/09 04:22 PM 05/05/09 04:22 PM
Joined: Mar 2003 Posts: 9,100 Rogue River, OR Jeremiah master
Jeremiah master Joined: Mar 2003 Posts: 9,100 Rogue River, OR	I have personally battled it out with two different Digi 6's on two different cars and never won. Ended up going back to the good old 7AL2 and 6AL2 boxes with all of the add-ons. I'm not saying that some of the advise above couldn't clear up you problem but my experience has not been all that great. That said I have a pal that swears by them and has been running one for a few trouble free years on the street.

Re: msd 6al to dig 6 now breaking up HELP [Re: Jeremiah] #307385 05/05/09 04:47 PM 05/05/09 04:47 PM
Joined: Jan 2004 Posts: 550 Ma Voluster OP mopar
Voluster OP mopar Joined: Jan 2004 Posts: 550 Ma	No welding on the car at all. Car was running fine! Pulled the 6 al and swapped to the dig 6 thats when the problem arrived. I called MSD and they gave me a few things to check they all checked out. I'm yanking the dig 6 box and they sent me a pick up tag and I'm shipping it to them. I also have a 8975 retard box that is going back for them to look at for a 2nd time. I'm putting the 6 al back in tonite

Re: msd 6al to dig 6 now breaking up HELP [Re: Voluster] #307386 05/05/09 04:49 PM 05/05/09 04:49 PM
Joined: Jun 2004 Posts: 1,217 Wellington, FL C cudabunch pro stock
cudabunch pro stock C Joined: Jun 2004 Posts: 1,217 Wellington, FL	Sorry to hear and it looks like it is hit or miss on a digital-6 I feel lucky mine works.

Re: msd 6al to dig 6 now breaking up HELP [Re: Voluster] #307387 05/05/09 05:14 PM 05/05/09 05:14 PM
Joined: Nov 2003 Posts: 2,715 closer to Canadian beer! torkrules I'm neurotic
torkrules I'm neurotic Joined: Nov 2003 Posts: 2,715 closer to Canadian beer!	Quote: Swapped my 6 al to a digital 6 and now the car breaks up around 3500rpm popping thru the carb and exhaust I check the timing after the box swap and was advanced to 45 so I brought it back down to the 34 I normally run. only thing I did was swap boxes everything was fine with the 6 al it is powered and grounded at the battery The pick up wires for the distributor is in the same spot with nothing around it I had the same problem with 8975 retard with the 6 al removed that and put a dial style retard in and problem went away I Wire remote starts and stereos for a living so it's not my 1st time around wiring Any Ideas? Thanks Phil I had a similar problem with my Charger a while back. MSD sells a sheilded pick up cable. This might help. It didn't with mine. I swapped distributors and that seemed to work. I went from an MP mechanical distributor to an MSD distributor and that cured it. When I took a closer look at the old distributor, a spacer was missing that caused the cam plate/rotor to move up and down. I got rid of the car before I could try it again.

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