MSD Tech Support Forums http://www.msdignition.com/forum/ This is a tech support discussion forum. To find out about MSD Ignition, go to http://www.msdignition.com/ . en Mon, 20 May 2013 21:06:08 GMT vBulletin 60 http://www.msdignition.com/forum/images/misc/rss.jpg MSD Tech Support Forums http://www.msdignition.com/forum/ Misfire thru rpm range http://www.msdignition.com/forum/showthread.php?t=19268&goto=newpost Sun, 19 May 2013 15:40:18 GMT Motor is a 400 .040 over with 3.48 stroke....377 ci Pro Topline 200cc heads with 64cc chambers 2.02/1.60 comp cam solid lift .548/.560 crappy... Motor is a 400 .040 over with 3.48 stroke....377 ci
Pro Topline 200cc heads with 64cc chambers 2.02/1.60
comp cam solid lift .548/.560
crappy Hurricane single plain intake
brand new AED 750 HO HP Holley
new MSD billet dizzy
8.5 wires
15 year old 6AL box
No matter what rpm i hold the throttle at, you can hear and feel a mis. When under a hard acceleration it runs terrific and pulls like a freight train. The idle sounds fine, but can tell there is a slight mis present.

I have tried the older MSD dizzy that is in my other car as well as 3 different carbs. Tried different wires and plugs, checked grounds, tried another coil. Nothing changes....still mis at any throttle. It's not bad, but noticeble especially when under decel in gear, Ii starts to buck untill i downshift. This is the same motor I've had in this car since 2004. Ran great up till when I pulled it in 2010 for some detail work and a few upgrades. The motor only got new rings, bottom end bearings and gaskets. It sat for almost 2 years covered in a bag. I was thinking wiped cam, so I pulled intake and checked to make sure all lifters were turning in bore while cranking motor, they were. I even pulled the plugs and turned over by hand to see it the rockers did a double lift on the valve...nope Could the box be acting up? It's the only thing I have not pulled from my other car to try in this one. ]]> Trouble-Shooting CHELKAMINO http://www.msdignition.com/forum/showthread.php?t=19268 8577, 8578 dimensions please http://www.msdignition.com/forum/showthread.php?t=19267&goto=newpost Sun, 19 May 2013 05:42:26 GMT Does anybody know the diameter of the cap for the 8578 and the 8577. Also the distance from the block to the top of the cap for both of these items... Does anybody know the diameter of the cap for the 8578 and the 8577.
Also the distance from the block to the top of the cap for both of these items please.
Going mad trying to find what I thought would be a simple google search. ]]> Applications aussieboy http://www.msdignition.com/forum/showthread.php?t=19267 6530 off idle miss http://www.msdignition.com/forum/showthread.php?t=19266&goto=newpost Sun, 19 May 2013 02:28:25 GMT Looking for some help on a problem I’ve had for a few years, I know a few years?? The problem is I have an off idle miss. The reason this has been around for so long is its not preventing me from driving the car. Now I've had this issue with several other dist in the car and different carburetors on it. It’s a 438 BBC I’m running a 780DZ carb and I was hoping that when I installed the new MSD 6530 it would solve the problem. Little more info If I drive the car hard as in launching or harder than normal acceleration you don't feel it its only when you take off from a stop sign at low acceleration. Like I said I’m 99% sure it’s not carb related as I've had several different carbs on the car and same problem. I do see several improvements with the 6530 as in much quicker starts and better all around driving, I’ve even had to rejet based on improved spark. All the other dist I've had I to crank on the motor for a few seconds and pump the gas a few times then it would start now its one pump and as soon as I hit the key its running auwsome. I do have two oxygen sensors in place and they are performing / indicating as I would think they should. Like I said I don’t believe it to be a fuel problem. I have been messing around with the timing curve and that seems to affect it a little? I have been reading and watched the video on rotor phasing could this be a problem? Can phasing be a problem at low and hi speed or just one of them. I had the same issue with a 6AL and the same magnetic pickup MSD dist I’m using now and also with a pertronixs dist and an excell unit. Currently Im running at 10 deg at idle and 7.25 inch of vac based on te Prodata screen, plugs are a nice coco brown on the plugs. I've had several diffeant caps and wires on the car still the same. I'd really like to find this problem Any thoughts would be greatly appreciated thanks again. ]]> Trouble-Shooting novahead http://www.msdignition.com/forum/showthread.php?t=19266 7730,7720 no start! http://www.msdignition.com/forum/showthread.php?t=19265&goto=newpost Sat, 18 May 2013 22:51:39 GMT Finally got the car running! Drove around the block twice, and tried to start it up for a friend to hear it, and no spark? Checked all connections.... Finally got the car running! Drove around the block twice, and tried to start it up for a friend to hear it, and no spark? Checked all connections. green light is blinking, but nothing out of coil? Tried another coil-nothing. Where do I start to diagnose it now? I have a labscope if needed? ]]> Trouble-Shooting allend43 http://www.msdignition.com/forum/showthread.php?t=19265 yz450f pc to ignition connection problem http://www.msdignition.com/forum/showthread.php?t=19264&goto=newpost Sat, 18 May 2013 01:20:08 GMT Hi,
I've got an ignition 4218 for a yz450f. My problem is that when I'm trying to connect the pc with the ignition I have to try a lot of times to manage the connection.
After connect once everything works OK. I have checked the connection with the usb +5v power cable and it sends voltage to the ignition to power the memory. Every time I had a problem was after a long brake of riding about 2-3 weeks.
I have a thought that it needs to charge an inner battery first so that it needs some time first. is it true or wrong?
Else do I have to check something?

Thanks Bill ]]> Powersports Trouble-Shooting proarm http://www.msdignition.com/forum/showthread.php?t=19264 ..Buick Know How: LT1 Optispark (ABITS) Distributor Operation and Diagnostics http://www.msdignition.com/forum/showthread.php?t=19263&goto=newpost Thu, 16 May 2013 20:08:18 GMT ..Buick Know How: LT1 Optispark (ABITS) Distributor Operation and Diagnostics http://www.youtube.com/watch?v=lFCjaz6zHfc ..Buick Know How: LT1 Optispark (ABITS) Distributor Operation and Diagnostics

http://www.youtube.com/watch?v=lFCjaz6zHfc ]]> Installation Questions msdtech1955 http://www.msdignition.com/forum/showthread.php?t=19263 Tach showing half revs (using tach adapter 8910) http://www.msdignition.com/forum/showthread.php?t=19261&goto=newpost Wed, 15 May 2013 16:06:54 GMT Hi,

I recently installed a haltech e6x with a haltech ignition module and twin coils in my ae86 (4ag 20v) but my factory tach didn't work so I bought a MSD Tach adapter 8910. I installed it but now it only shows half of the revs that the engine really is. what is the correct setup for this application?

thanks ]]> Trouble-Shooting rompe81 http://www.msdignition.com/forum/showthread.php?t=19261 Timing advice http://www.msdignition.com/forum/showthread.php?t=19260&goto=newpost Wed, 15 May 2013 12:09:46 GMT I have a 351C stroked to 393. Trickflow 190 heads, locked out dist at 35 deg, 6530 ingnition, HrII coil. full roller at .602 and .612 lift, 110... I have a 351C stroked to 393. Trickflow 190 heads, locked out dist at 35 deg, 6530 ingnition, HrII coil. full roller at .602 and .612 lift, 110 separation.
I dont think I have enough initial timing (currently at 16 deg). I base this on running hot at idle and occasional run on. Any experience with inital timing and all in RPM would help. ]]> Trouble-Shooting candoo http://www.msdignition.com/forum/showthread.php?t=19260 Power Grid - Blown Alcohol at Bonneville? http://www.msdignition.com/forum/showthread.php?t=19254&goto=newpost Tue, 14 May 2013 14:29:11 GMT RE: Application Questions on Power Grid for blown alcohol at Bonneville Due to certain class requirements, we want to switch over to a MSD... RE: Application Questions on Power Grid for blown alcohol at Bonneville

Due to certain class requirements, we want to switch over to a MSD digital box that can control timing, can implement boost retard, etc.. I'm thinking a new Power Grid setup might work, but need your advise:

Application: Vintage Cadillac V8 Flathead
Bore: 3.552
Stroke: 4.625
Compression: 7.5 to 1
RPM limit: 6200
Boost 14 - 18 lbs
Fuel System: Enderle hat injector on a race 6-71 blower. Has 8 hat nozzles and 8 port nozzles
Fuel: We're running two classes - one with alcohol, the other with race only gas
Track: We will be running the 3 mile and 5 mile track - so this is more like a long boat race application, than a 1/4 mile application.

Previous Ignition: 4 amp Vertex race magneto

Will the Power Grid have enough spark energy for this application?

Thanks! ]]> Applications DaleHays http://www.msdignition.com/forum/showthread.php?t=19254 Tach Signal http://www.msdignition.com/forum/showthread.php?t=19253&goto=newpost Tue, 14 May 2013 02:37:14 GMT I don't have a fancy O-scope unfortunately, but I am trying to make a digital controller based on engine RPM. From my understanding, the tach signal is a 12 volt high that is on for 20% duty cycle, I.e. it steps up to 12 volts for 1/5 of the rotation and drops back to 0 volts for the other 4/5's? ]]> Installation Questions bronco9588 http://www.msdignition.com/forum/showthread.php?t=19253 Promag 44 / 8147 / 8142 question http://www.msdignition.com/forum/showthread.php?t=19252&goto=newpost Mon, 13 May 2013 20:42:49 GMT So running the above with a Grid. Some of the wiring drawings/pdf's posted on here have a jumper from the coil ground lug to the negitive side of the coil. The coild comes with a jumper but looking at the pdf posted on here it does NOT show the jumper in place.

Is this jumper supposed to be used or not? ]]> MSD Pro Mag Tech Section Outlawduce http://www.msdignition.com/forum/showthread.php?t=19252 Power cutting out http://www.msdignition.com/forum/showthread.php?t=19250&goto=newpost Sun, 12 May 2013 16:00:12 GMT I have a Twin Vortech Supercharged 1972 Camaro SS with a 383. I am running MSD 8.5 wires, ProBillet Dist, Blaster Coil, BTM, and a 6AL with an Optima... I have a Twin Vortech Supercharged 1972 Camaro SS with a 383. I am running MSD 8.5 wires, ProBillet Dist, Blaster Coil, BTM, and a 6AL with an Optima Yellow Top Battery.

My question is, have you ever had issues with running the thick red wire from the 6al to the side post of a Optima battery (it also has my Amp and air ride tapped into that side post)? I have the ground from the 6al on the side post ground (nothing else tapped into that post).

Just recently (within the last month) I have issues where the car will just shut off while driving approximately 6 miles, it does not want to start back up for a long time after it dies, it will turn over but not fire). I just added the Optima Battery, and that is when I put the red wire to the side post (and I also added an additional air comp. for the air ride)

I started replacing items, and it is getting costly and frustrating, I replaced the wires, cap, rotor and mag pick up due to it being severely corroded again, still nothing. I called the tech support line and they walked me through a troubleshooting path, and they thought it was my BTM, so I bought a new one.. $$$... still having issues, I also replaced the Blaster coil and traced all the wires, still doing it.

A couple friends told me that they have issues with side posts on Optima, but I wanted to check with you. I switched the 6al wires to the top post of the battery, but I have not taken it on a 6 mile cruise yet, i'm tired of getting towed home. I'm hoping that the side post (also due to other electronics being tied into it) does not have enough voltage to support the 6al and is causing it to cut off during driving.

One last thing, I also notice now that I replaced the blaster coil (it is mounted under my passenger side dash, inside the car, same place the old one was) I hear a very audible "clicking" noise that coincides with the RPM (spark I assume). The car does not appear to be running bad, but the sound is annoying, is this normal? Thank you very much.
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]]> Trouble-Shooting windale38 http://www.msdignition.com/forum/showthread.php?t=19250 Digital 7 LED error code 2 http://www.msdignition.com/forum/showthread.php?t=19249&goto=newpost Sat, 11 May 2013 20:23:18 GMT Hi guys
My MSD LED 7 flashes twice when ignition is switched on. Manual says this indicates "No Cam Sync". I have the Fiber Optic Inductive Pickup installed.
The motor ran fine until the Unilite module failed. This has been replaced and there is now a spark. the motor fires but will not run and backfires through the carburetor when trying to start it. This sounds like a timing issue but I have not changed the timing. Would the failure of the Fiber optic pickup be the only possible cause? Want to be sure before I spend $100 for a replacement.
Thanks,
Scott ]]> Trouble-Shooting scott747driver http://www.msdignition.com/forum/showthread.php?t=19249 Msd 6425 http://www.msdignition.com/forum/showthread.php?t=19248&goto=newpost Sat, 11 May 2013 07:20:55 GMT i have a 6425 that has stopped working and would like to RMA it but i live in Australia and the RMA form has nothing regarding that how do i get this... i have a 6425 that has stopped working and would like to RMA it but i live in Australia and the RMA form has nothing regarding that how do i get this sorted ]]> Trouble-Shooting kingswood http://www.msdignition.com/forum/showthread.php?t=19248 MSD7535 Cam Sync http://www.msdignition.com/forum/showthread.php?t=19247&goto=newpost Fri, 10 May 2013 18:32:09 GMT Can a Programmable 7535 ignition box be made to work without a cam sync input? I have a 7535 I'd like to use in place of a 7al-3. ]]> Trouble-Shooting DynoShop http://www.msdignition.com/forum/showthread.php?t=19247