help car won't start

[DMC5180]

Your A/C blower fan Cycling ON and OFF is likely caused by the Fan Breaker tripping off and on. The originals are known to be slightly under rated. From the picture you posted you still have the Original breaker (w/ spade connections). Replace it with a (40 amp) stud type. You'll need to convert to Ring terminals like the the one next to it.

[Silverbullet]

Ok, So I now know that I am not getting high voltage to the spark plugs when cranking, and it hence won't start... What should I do...Coil + gets 12.4 volts, Could it be a bad coil? Is it the ECU? Lost here...

Thanks,
Craig

[DeloSTM]

If its a Bosch coil make sure it is wired up correctly. Bosch doesn't label the terminals + and -. 1 is negative. Then attach a test light to the negative terminal and make sure it flashes on and off while cranking. If it doesn't flash then your ECU probably is bad or the pickup in the distributor is bad, or the wiring is bad.

[Silverbullet]

If its a Bosch coil make sure it is wired up correctly. Bosch doesn't label the terminals + and -. 1 is negative. Then attach a test light to the negative terminal and make sure it flashes on and off while cranking. If it doesn't flash then your ECU probably is bad or the pickup in the distributor is bad, or the wiring is bad.

I am guessing the wires are right as I was driving it when it died. My Bosch coil is clearly marked + &- . How do I hook up a test light? Ground and - on the coil?

[Ron]

Ok, I have 12.4 Volts to the + side of the Coil... but no spark to the plugs... So... Where do I look... and Where is the ECU?

Thanks,
Craig

I would make sure that 12.4 volts is strong (remove and test with icepick probe or a medium sized bulb to ground instead of meter...or as mentioned above).

Did you check for spark coming out of the coil before checking at the plugs?
If not, keep following the power. If it has spark you can forget the ECU and check spark at cap, then plug wires or rotor button. If you don't have spark at the coil, check it. ...I can't remember exactly for a D, but rule of thumb is .79 ohms across the small terminals, and, 10.5K ohms across the (+) and center terminal for most types of automotive coils. If it checks ok, then check the ECU or distributor .

[Silverbullet]

I would make sure that 12.4 volts is strong (remove and test with icepick probe or a medium sized bulb to ground instead of meter...or as mentioned above).

Did you check for spark coming out of the coil before checking at the plugs?
If not, keep following the power. If it has spark you can forget the ECU and check spark at cap, then plug wires or rotor button. If you don't have spark at the coil, check it. ...I can't remember exactly for a D, but rule of thumb is .79 ohms across the small terminals, and, 10.5K ohms across the (+) and center terminal for most types of automotive coils. If it checks ok, then check the ECU or distributor .

I swapped in a coil from an old Mustang, and I still had no spark.... What is the best way to check for spark out of the coil? Hold close to ground and crank?

Thanks....

[Ron]

Did you try a bulb?

"Still" no spark from where? The plug wires?

Yes, just use a spare plug wire and push back the boot or use a phillips screwdriver and hold it about ~1/8" from the block.

[Silverbullet]

Did you try a bulb?

"Still" no spark from where? The plug wires?

Yes, just use a spare plug wire and push back the boot or use a phillips screwdriver and hold it about ~1/8" from the block.

Ok, I used my test light, it was dim on the + on the coil, the + has a White wire with a yellow stripe, and a Looks like added Yellow Wire. I used my test light on the Ballast and it was bright... So I used a jumper wire from the Ballast to the + on the coil, and tried to start, sitll did not fire.

[DeloSTM]

Did you put your test light on the negative side of the coil?

[Silverbullet]

Ok... This Sucks...

I used a wire from the center of the coil close to ground... cranked, it sparks... So then I pulled a spark plug wire, inserted the wire put close to ground, and it sparks... car still does no try to fire.... ahhhhh

And Thanks guys for the help...