Oh my God! Still no spark.....

[gunmetal]

New coil, new MSD box, new ground wire from battery to block/block to frame. New plug wires, new coil on distributor. Replaced park/nuetral switch. Car starts but still no spark, voltage at battery 12V with good connectivity from battery to ground.

WHAT THE HECK

[wagesofsin]

New coil, new MSD box, new ground wire from battery to block/block to frame. New plug wires, new coil on distributor. Replaced park/nuetral switch. Car starts but still no spark, voltage at battery 12V with good connectivity from battery to ground.

WHAT THE HECK

how can it "start" if theres no spark?

 

i would revert to a standard ignition, then work my way back to the msd, if thats what you prefer.
gotta be something simple , theres not that much involved.

[gunmetal]

Sorry, turns over....... this thing has got me so frustrated.

[wagesofsin]

no problem, i wasnt trying to be a smartazzz.

seriously, its a circuit, you just need to trace it.
youll find the weak link.
think fast and move slow.
got a multi meter?

[gunmetal]

Can I take a volt meter and go from ground to + side of the coil and test for 12 volts?  Does that tell me anything?

[Strawdawg]

It tells you if you have voltage to the coil which is one of the required necessities (it will be less than 12 if you are running a ballast resistor).  You also need to see if it has power to the coil while the engine is being turned over.

If not using a point distributor, be sure the reluctor gap is close to .008" as well

[wagesofsin]

are you running a b/resistor?
i asked that before in the other thread.
have you pulled a plug wire and verified you are getting no spark?


as dumb as this sounds, try running a hot lead to the coil, then turn it over.
dont leave it connected for long, or damage will occur, but if it fires, theres your huckleberry.

[GoodysGotaCuda]

what are we dealing with?

Did it start before the MSD and such?
What did you recently change?
Are you sure your small red wire to the MSD has 12v in both "start" AND "run" key positions?
Is the distributor properly installed/primed?
Does it just turn over?
Does it try to start?
How are you determining no spark?

[acudanut]

 Does it have power at the Coil with the Key on ? IT SHOULD. Chances are, that's your problem (if it does not)  PS I hope you don't have points. 

[gunmetal]

Drove it one night, next morning it would not start, replaced the coil and it fired right up.  next morning it was dead again. Msd 6a, blaster 2 coil, taylor wires, platinum plugs, cap rotor, dist coil, ground strap from battery to block, block to frame.  all new still nothing.  got in it tonight would not turn over messed with the top wire on the starter and it would then turn over.  turns over easy just no spark.  I turned the key on and put a multimeter on the positive side grounded to the frame and I have no voltage.

What do you mean by priming the dist?

[dodj]

I think you are going to have to trace each wire out as Wages saying. Follow each wire all the way, don't assume anything. Make sure the large red wire goes to the positive battery terminal and the black goes to the negative. I'm not trying to be insulting, really you have to follow each wire ALL the way. Next, check the green and violet wires from the MSD go to the dist. The green wire connects to the black (-)wire. Violet to the other. Next, the orange coil wire goes to the + terminal, and the black to the - terminal. Then follow where the red wire goes. I connected mine to the brown wire at one end of the ballast resistor. It MUST have 12v when you go to start the car (ignition run). Pop the cap off the distributor and look at the reluctor. If there are filings in there your reluctor is probably shot. Otherwise a good reluctor and a bad one look the same. Hopefully tracing out each wire finds the problem. 

[shadango]

Double and triple check the connections at the ballast.

I was having random issues where the engine would crank but no fire.....sometimes the car would just quit while driving....talk about embarassing...a bright green classic car stalled in the intersection.....

I have Bill Evan's wiring harness and found that the plastic plug on one of the ballast connectors was kerfluxed...removed the wire and terminal from the plug, hooked it up without the plastic plug part and so far no issues.

May or may not be YOUR issue....follow the advice the others have given...look for voltage where there needs to be voltage....

[dodj]

Just another thought. If the white wire is somehow grounded, you will get no spark.

[quagmire]

If you do not have 12v key on and cranking at the coil, don't worry about checking anything in the distributor just yet.  The reluctor will not have any affect on whether you have 12v key on.  Take your meter and work your way up the circuit until you get 12v.  Once you find 12v again you know where to start looking for the problem.

Start at the MSD box. If the box has power and ground, and the signal input wires are ok, the box is bad.  If not, work your way up the wiring.

[gunmetal]

If i have a bad wire at the starter will it rob votage from the system.  The top wire seems to have a connection problem, car won't turn over, then I move the top wire on the starter and it will turn over; still no spark though.

Electronic ignition no ballast. Wired the hot wire from the MSD dorect to the battery with new wire, did the same thing with the ground. Didn't help.