pics of the 72 as promised but I have questions |
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pics of the 72 as promised but I have questions |
superdad88 |
Jun 25 2011, 03:27 PM
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#1
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Newbie Group: Members Posts: 23 Joined: 24-June 11 From: omaha,ne Member No.: 13,238 Region Association: Upper MidWest |
Ok here are the pics of the car that I am going to buy. I worked on getting it running and I believe I think I know what's wrong with it. I wasnt getting any spark to the spark plugs. So I traced it all the way back to the MSD. I believe the MSD is bad but wanted to ask you guys for sure before I go and spend 300 bucks. There is a gold box to the right of the MSD, not sure what this is. I did check the transformer and I am getting voltage from there. I checked the MSD as per their website and from what I can tell its not providing spark. But what is the gold box? Wanted to make sure it might be something simple and I am missing it before I spent the 300 bucks. |
superdad88 |
Jun 26 2011, 09:19 AM
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#2
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Newbie Group: Members Posts: 23 Joined: 24-June 11 From: omaha,ne Member No.: 13,238 Region Association: Upper MidWest |
Would you mind restating that?: The MSD can be tested independently. Power on, intermittently ground the 'points wire.' You should make sparks. The points replacement can also be tested separately with a meter. That's how I checked to see if the MSD was bad. I didnt get any spark. |
ArtechnikA |
Jun 26 2011, 09:42 AM
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#3
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
That's how I checked to see if the MSD was bad. I didnt get any spark. That's how Autotronic suggests it be tested. Of course, that test is only valid if there is +12 at both the places it's supposed to be. It's really important that the 'heavy' wires go directly to a high-current source, like the battery. All multi-spark systems generate a lot of energy - much more than can be delivered through the switched ignition lead. But - could also be that the 'coil' - which has not been seen or described - is bad. Be advised that anything on the output side of the MSD is potentially lethal voltage - test with care ! If you wanted to continue with the MSD, the Summit MSD clone, the Crane HyFire, or some other CDI box, I'd recommend getting either a Crane high output pulse transformer, or an MSD 'High Vibration' Blaster-2. (The 'High Vibration' Blaster is the only MSD-brand 'coil' that can be mounted in any orientation...) If you want to just get it running, and deal with CDI later, a Bosch Blue will do nicely for now. You'll also need a condenser, which may or may not still be attached to your dizzy. (Actually - if you keep the Crane points replacement module, you may not need the condenser either...) You might also not get a spark if the rotor isn't pointing 'close' to a spark plug tower. with 6's and 8's there's usually one 'close enough' all the time, but /4's towers are pretty far apart... The advantage to keeping points with CDI is that they draw so little current that they don't arc and burn. They are still subject to rubbing-block wear tho. If the Crane is working, I'd keep it. |
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