MSD and Tach need expert advise?
 

1973.5 Porsche 911T
I have installed a MSD 6AL, msd tach adapter and a MSD blaster coil.
The tach stop working, aside from sending out my tach to Palo Speedo or North Hollywood Speedo, Is there other ways of making it work?

I need expert advise from someone who has installed this product before and made it work by using this MSD products.

I have wired this a few different ways with no luck.

Let me know
Thank You for your replys

If the tach needle doesnt move at all, check the wiring. If the needle moves erratically, you probably need a tach adapter. Early tachs work on a different signal than later tachs.

When I first installed it the tach needle worked erractically, then it stop and then it would occasionally work between 1000 - 2000 rpm only.

Well now it completely stop working.

I do have a tach adapter hooked up to it already.

Please feel free to give any advise you know off.

Any mechanics out there that have done this type of install before and made the the tach work?

If you are willing to help me it would be greatly appreciated.

Thank You

Sorry, what you describe is similar to what happened with my 914/6. I tried everything. Finally ended up sending it off to NorthHollywood speedo. $130 later it works perfectly. You could also accomplish this by finding and using a later model tach. Not sure which year is where the internal change occured.

James

Thank You
I think I am leaning towards sending out my tach to North Hollywood as well.

Are they a good company to deal with. Are they true to there word of one week turn around.

Is the tach very simple to remove.

Thanks

my 3.0 in my 74 911 w/ original tach works fine w/ the msd and no tach adapter.

The tach was from an original 1970 Factory 6. Now it works without the tach adapter.

James