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#1056906 - 04/15/18 12:01 AM MSD 8366 Distributor Modules are JUNK!  
Joined: Sep 2011
Posts: 95
Dan The Man 920 Offline
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Dan The Man 920  Offline
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Joined: Sep 2011
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East Rockaway, NY
I am sure that there is already threads on this subject, but I want to share my personal experience with everyone and hopefully help someone avoid the same problems I have faced. 2 winters ago(yes I drove my car in the snow) I purchased an MSD 8366 Pro-Billet Distributor to replace my Jegs small cap HEI unit which had a bad pickup coil and had the magnet severely rusted. Initial impressions were that the MSD unit was a very well built piece. Full billet housing, .500" diameter shaft, MSD's style of mag pick up trigger and an MSD brand module. I did not have a single issue up until last September where my car backfired and died driving down the parkway. The car had no spark or a cranking signal(tach was not moving when engine cranked). It turned out that my nearly new MSD distributor module was dead. After contacting MSD, they did right by me and replaced the module free of charge. I drove the car for about another 4 weeks and put it away for the winter(I got a winter beater for this year). Yesterday, I took it out for the first time this spring and it started right up and ran great. Today however, it was about 80 degrees and sunny so I took it out again. As I was cruising along, the car shut off and I was unable to re fire the car. Thankfully, I had an original, 30 year old ignition module with me that I swapped in on the side of the road. Sure enough, the car fired right up. IT KILLED ANOTHER MODULE! A brand new piece from MSD was dead with less than 24 hours of run time on it. Is there anyone out there who has had this same experience with MSD products? I thought they were better than this.


1987 Monte Carlo SS, Flowtech Headers, True Duals Jet stage 2 chip, KN filter Accel 300+ ignition, M/T ET Streets
Best E.T. 15.415@87.39mph
#1056908 - 04/15/18 12:32 AM Re: MSD 8366 Distributor Modules are JUNK! [Re: Dan The Man 920]  
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supernova455 Offline
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supernova455  Offline
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tampa, fl usa
Been there, done that, story is too long to type here. I learned long ago it is DAM hard to beat the GM ffactor HEI big or ssmall cap distributor!! Especially the moduels !

#1056912 - 04/15/18 02:08 AM Re: MSD 8366 Distributor Modules are JUNK! [Re: Dan The Man 920]  
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86ttop Offline
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86ttop  Offline
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Brooksville, Fl
You found out that MSD is junk. let me find a good thread and I'll post it.http://www.chevelles.com/forums/18-engine/1051057-exaust-popping-after-i-added-external-ignition-coil-video-post-2.html Dave Ray is the one to read, he's been in the ignition business for many years, good luck!!


Leo Paugh
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If things improve with age, I must be approaching magnificent. thumbs
#1056918 - 04/15/18 04:42 PM Re: MSD 8366 Distributor Modules are JUNK! [Re: Dan The Man 920]  
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Intmdatr3 Offline
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Intmdatr3  Offline
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North Central Wisconsin
I had the same problem last year with the Monte. The Monte died on us driving home from car show. Thought I fixed it when I replaced module but died on me again. Finally replaced the whole distributor will not have another MSD one again pure junk........


[Linked Image]
#1056920 - 04/15/18 06:24 PM Re: MSD 8366 Distributor Modules are JUNK! [Re: Dan The Man 920]  
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1 Slow SS Offline
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1 Slow SS  Offline
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Small town USA
I also used MSD for many years with great success. Since I have moved to DUI for my newer builds.


Be a car builder, not a googler!
#1056940 - 04/17/18 01:23 PM Re: MSD 8366 Distributor Modules are JUNK! [Re: Dan The Man 920]  
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thepezking639 Online headbang2
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thepezking639  Online headbang2
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Livonia, MI
Yeah, I'd never willingly spend money on anything that MSD makes. Unless you spend time over 7K rpm, spray or shove boost down an motor. A GM HEI is all you need. And If you do use the bottle or boost, I recommend using LS coil near plug with a microsquirt and a reluctor wheel.

Last edited by thepezking639; 04/17/18 01:55 PM.

86 SS 6.0L LQ4, TBSS GEN IV intake, 92mm TB, 30lb injectors, Summit Stage 3 NA Cam, Stainless long tube headers, Stainless 3in exhaust, Microsquirt ECU, Built 200-4R, B&M Megashifter, Torsen LSD, QA1 Lvl 3 Suspension Kit, UMI Front & Rear Braces. Check out my build thread: http://www.pro-touring.com/threads/126188-SSLOW6-0-Build
#1056948 - 04/18/18 02:20 PM Re: MSD 8366 Distributor Modules are JUNK! [Re: Dan The Man 920]  
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Bitflipper Offline
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Bitflipper  Offline
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Las Vegas, NV
You're lucky you were only blowing modules. When my MSD distributor went it started creating a massive backfire due to misfiring. This ended up creating serious damage across my car including blowing out the catalytic converter, intake manifold gasket, and who knows what else I haven't found to this day. The thing that really kills me about the experience is that I went to the junk yard, found a Cadillac with an OEM distributor that looked to be in really good shape, swapped it in and the backfiring disappeared. I'm still running that distributor from the Cadillac donor.

So I definitely agree, those MSD distributors are junk and will cause thousands of dollars of damage beyond the distributor failure itself. Their ignition modules are also crap, they overheat and will leave you on the side of the road on a hot summer day after around 20-30 minutes of driving until they cool down, then fail again every few minutes until you finally get home.


[Linked Image]
#1057038 - 04/26/18 01:43 AM Re: MSD 8366 Distributor Modules are JUNK! [Re: Dan The Man 920]  
Joined: Sep 2011
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Dan The Man 920 Offline
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Dan The Man 920  Offline
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East Rockaway, NY
I'm just thankful that I was close to home when they both failed. Although the second time I was fully prepared with my old gm module. The first time I needed a tow, which was a fiasco in itself.


1987 Monte Carlo SS, Flowtech Headers, True Duals Jet stage 2 chip, KN filter Accel 300+ ignition, M/T ET Streets
Best E.T. 15.415@87.39mph
#1057080 - 04/29/18 08:18 PM Re: MSD 8366 Distributor Modules are JUNK! [Re: Dan The Man 920]  
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Buick Runner Offline
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Buick Runner  Offline
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Dharma station 1 the Hydra
Generally with HEI ignition modules, the dist housing acts as a heat sink. This is why you use special heat sink paste for electronics to coat the bottom of ignition modules.


SBC powered 1987 Regal with TES headers, ZZ4 intake, ZZ4 PROM chip, mini starter, THM2004R, 2500 stall converter, 2040 cam, CCC system, and 3.73 posi rear.

2008 ex NPS P71 Crown Victoria, cop motor, cop shocks, cop brakes.

Never argue with an idiot.
They will just drag you down to their level and beat you with experience.
#1057084 - 04/30/18 01:24 AM Re: MSD 8366 Distributor Modules are JUNK! [Re: Dan The Man 920]  
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AkronAero Offline
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AkronAero  Offline
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Akron OH
Two years ago had an MSD ignition module and rotor failed (carbon button exploded). Replaced with DUI cap, coil and rotor and MSD 6AL ignition control box. Epoxy in the coil cracked after maybe 1000 miles and I replaced all with AC Delco. Have a complete spare cap, rotor and coil assembled and in the trunk now.... we shall see. Some guys change theirs out every spring just to be safe. Lots of old school guys debating non-conductive paste vs no paste.
Gordon

#1057107 - 05/01/18 12:07 AM Re: MSD 8366 Distributor Modules are JUNK! [Re: Dan The Man 920]  
Joined: May 2007
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Buick Runner Offline
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Buick Runner  Offline
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Dharma station 1 the Hydra
You don't use non conductive paste (dielectric grease), you must use special heat conductive paste, totally different stuff. Putting a module on dry is a guaranteed rapid failure, no matter the brand.


SBC powered 1987 Regal with TES headers, ZZ4 intake, ZZ4 PROM chip, mini starter, THM2004R, 2500 stall converter, 2040 cam, CCC system, and 3.73 posi rear.

2008 ex NPS P71 Crown Victoria, cop motor, cop shocks, cop brakes.

Never argue with an idiot.
They will just drag you down to their level and beat you with experience.

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