Jump to content
  • When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

Recommended Posts

Having a very weird issue going on, and I did an extensive search but can't seem to find an exact match to this.

 

4 weeks after installing an MSD 6 box I now have INTERMITTENT engine run-on. Originally everything was good, then a week or two into the MSD the engine would run for a split second after the key was turned off, and now will continue to run at times after the key is all the way out, or just shut off as it should.

 

I know the MSD can cause run-on but my reading suggests this would be an immediate thing and would happen consistently. As soon as I have the chance I will be adding the diode (capacitor? Resistor? Thingy?) that comes with the box to fix run-on; but thought I would see if anyone else has run into this.

 

Is this how run-on normally happens and will be fixed with the diode? Is something else going on and I'm killing something in my system?

 

Along with the diode I will be installing a tach adapter to get my tach back and changing out the coil to a Blaster 2.

 

Thanks in advance for any help!

Yes, there WAS skin on my knuckles before I started the repair...

Link to comment
Share on other sites

Do you have an electric fan? It could also be from your heater fan. If you have it wired so the fan is controlled by the ignition switch and the fan is running when you turn the key off the fan will act like a generator until it stops and will produce just enough voltage to keep the MSD energized. If you run the fan through a relay or have a diode in the line you can stop this.

1970 1602 (purchased 12/1974)

1974 2002 Turbo

1988 M5

1986 Euro 325iC

Link to comment
Share on other sites

Definitely make sure you have a diode in the blue wire to the alternator - I believe that's the one that comes with the MSD box.

 

Will do, thanks. Just seems weird; I drove it yesterday and it turned off no problem.

Yes, there WAS skin on my knuckles before I started the repair...

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • BMW Neue Klasse - a birth of a Sports Sedan

    BMW Neue Klasse - a birth of a Sports Sedan

    Unveiling of the Neue Klasse Unveiled in 1961, BMW 1500 sedan was a revolutionary concept at the outset of the '60s. No tail fins or chrome fountains. Instead, what you got was understated and elegant, in a modern sense, exciting to drive as nearly any sports car, and yet still comfortable for four.   The elegant little sedan was an instant sensation. In the 1500, BMW not only found the long-term solution to its dire business straits but, more importantly, created an entirely new
    History of the BMW 2002 and the 02 Series

    History of the BMW 2002 and the 02 Series

    In 1966, BMW was practically unknown in the US unless you were a touring motorcycle enthusiast or had seen an Isetta given away on a quiz show.  BMW’s sales in the US that year were just 1253 cars.  Then BMW 1600-2 came to America’s shores, tripling US sales to 4564 the following year, boosted by favorable articles in the Buff Books. Car and Driver called it “the best $2500 sedan anywhere.”  Road & Track’s road test was equally enthusiastic.  Then, BMW took a cue from American manufacturers,
    The BMW 2002 Production Run

    The BMW 2002 Production Run

    BMW 02 series are like the original Volkswagen Beetles in one way (besides both being German classic cars)—throughout their long production, they all essentially look alike—at least to the uninitiated:  small, boxy, rear-wheel drive, two-door sedan.  Aficionados know better.   Not only were there three other body styles—none, unfortunately, exported to the US—but there were some significant visual and mechanical changes over their eleven-year production run.   I’ve extracted t
  • Upcoming Events

  • Supporting Vendors

×
×
  • Create New...