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Username Post: Car won't start. No spark to plugs        (Topic#356606)
Denver56BelAir 
Senior Member
Posts: 539
Denver56BelAir
Loc: Parker, Colorado
Reg: 01-11-05
05-30-19 02:39 PM - Post#2767346    

I'm running a single point distributor on my 327. There is no spark to the plug. My coil ohm reading is 1.5 I believe, if I'm reading right. The car ran for quite awhile with new point I installed. With the cap off, I can't tell if there is an spark from the distributor to the rotor.

I don't know what to check next, or how. I was driving the car, I stopped at a gas station to fill up, it wouldn't start again. The car turns over with ease. I'm 'certain' it's not a fuel issue.

Paul
Parker, Colorado
56 BelAir Post, T56, 327, 4:11, Astro custom chrome steel wheels,
http://tinyurl.com/56belair


 
Ecklers AutoMotive
acardon 
Ultra Senior Member
Posts: 11292
acardon
Loc: DFW TEXAS
Reg: 03-25-05
05-30-19 03:00 PM - Post#2767348    
    In response to Denver56BelAir

Check for voltage at the + coil terminal while cranking.

Don
66 Corvair (driving)
57 2dr HT (driving)
56 2dr HT (waiting to be restored)


Edited by acardon on 05-30-19 03:02 PM. Reason for edit: No reason given.

 
Denver56BelAir 
Senior Member
Posts: 539
Denver56BelAir
Loc: Parker, Colorado
Reg: 01-11-05
05-31-19 06:17 PM - Post#2767440    
    In response to acardon

Using my VOM in DC, I measured the voltage from the positive side of the coil and grounded to the header while we cranked the engine over. I saw the numbers fluxuate a bit but the voltage settled to zero while we continued to crank the engine. I'm assuming I am using my VOM correctly.

I tried measuring from the negative side to the header and it was zero. What next?

Paul
Parker, Colorado
56 BelAir Post, T56, 327, 4:11, Astro custom chrome steel wheels,
http://tinyurl.com/56belair


 
acardon 
Ultra Senior Member
Posts: 11292
acardon
Loc: DFW TEXAS
Reg: 03-25-05
05-31-19 07:10 PM - Post#2767446    
    In response to Denver56BelAir

It should be a solid 10 volts or so while cranking. Is it 12+ volts in the run position at the + coil to ground? You may have a bad connection on the ignition switch.

Don
66 Corvair (driving)
57 2dr HT (driving)
56 2dr HT (waiting to be restored)


Edited by acardon on 05-31-19 07:11 PM. Reason for edit: No reason given.

 
Denver56BelAir 
Senior Member
Posts: 539
Denver56BelAir
Loc: Parker, Colorado
Reg: 01-11-05
05-31-19 07:14 PM - Post#2767447    
    In response to acardon

That could be possible, I'll check it out. TO verify, I tested the voltage in the start position, not the run position I think. When you are cranking the motor, isn't that the starting position?

Paul
Parker, Colorado
56 BelAir Post, T56, 327, 4:11, Astro custom chrome steel wheels,
http://tinyurl.com/56belair


 
acardon 
Ultra Senior Member
Posts: 11292
acardon
Loc: DFW TEXAS
Reg: 03-25-05
05-31-19 07:53 PM - Post#2767453    
    In response to Denver56BelAir

Yes, you should have voltage both while cranking and in the run position, but they come from a different terminal of the ignition switch.
The voltage while cranking will be less, because of the current draw of the starter drops the battery voltage down.

Don
66 Corvair (driving)
57 2dr HT (driving)
56 2dr HT (waiting to be restored)


 
Denver56BelAir 
Senior Member
Posts: 539
Denver56BelAir
Loc: Parker, Colorado
Reg: 01-11-05
05-31-19 07:58 PM - Post#2767454    
    In response to acardon

I took a look around my ignition and checked the wires. I didn't find any that were disconnected from the back of the switch or even loose. The one's I were suspecting, at the top of the ignition switch were fastened. Thoughts?

Paul
Parker, Colorado
56 BelAir Post, T56, 327, 4:11, Astro custom chrome steel wheels,
http://tinyurl.com/56belair


 
bobb 
Super Senior Member
Posts: 5468
bobb
Loc: paradise
Reg: 09-05-03
06-01-19 10:30 AM - Post#2767485    
    In response to Denver56BelAir

grounding anything to a header is not a good idea. you can hot wire it. run a wire from the + side of the battery to the + side of the coil. if you have an ignition resistor it may have failed.

70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails.


 
Denver56BelAir 
Senior Member
Posts: 539
Denver56BelAir
Loc: Parker, Colorado
Reg: 01-11-05
06-01-19 12:01 PM - Post#2767489    
    In response to bobb

I verified again, I have just under 12V from coil positive terminal to ground on my header when the switch is in the run position.

Paul
Parker, Colorado
56 BelAir Post, T56, 327, 4:11, Astro custom chrome steel wheels,
http://tinyurl.com/56belair


 
acardon 
Ultra Senior Member
Posts: 11292
acardon
Loc: DFW TEXAS
Reg: 03-25-05
06-01-19 01:16 PM - Post#2767497    
    In response to Denver56BelAir

  • Quote:
I measured the voltage from the positive side of the coil and grounded to the header while we cranked the engine over. I saw the numbers fluxuate a bit but the voltage settled to zero while we continued to crank the engine.



If you have zero voltage while cranking, try what Bobb suggested. Temporairly jumper from the + battery to the + coil and see if it starts. If all the wires are plugged on the ignition switch, the ign2 terminal (dark green wires) on the switch may be dead. http://www.trifive.com/garage/56%20Chevy%20A ssembl...

Don
66 Corvair (driving)
57 2dr HT (driving)
56 2dr HT (waiting to be restored)


 
Blu 67 
"7th Year" Silver Supporting Member
Posts: 445
Blu 67
Loc: Oshawa, Ontario Canada
Reg: 10-15-05
06-01-19 06:14 PM - Post#2767505    
    In response to acardon

Cracked or broken rotor?
Does the pin in the cap spring when you push it down thereby making a good contact.
Is there contact from the rotor to the cap?

Cliff

67 Impala 2 Dr Hrdtp,Bought in 1979*283 Edelbrock intake,ceramic headers,3 speed TH350 auto.,aluminum radiator,350 Crate motor Daily driver in the summer. 68 station wagon frame .2017 Classic Auto Air Global Western Upper arms,strut rods.


 
Denver56BelAir 
Senior Member
Posts: 539
Denver56BelAir
Loc: Parker, Colorado
Reg: 01-11-05
06-02-19 07:53 PM - Post#2767573    
    In response to acardon

I verified I don't have 12V when I crank the engine, only 12V in the run position. I will try to jumper my positive battery post to the positive of my coil.

Paul
Parker, Colorado
56 BelAir Post, T56, 327, 4:11, Astro custom chrome steel wheels,
http://tinyurl.com/56belair


 
Denver56BelAir 
Senior Member
Posts: 539
Denver56BelAir
Loc: Parker, Colorado
Reg: 01-11-05
06-03-19 09:16 AM - Post#2767599    
    In response to Denver56BelAir

If I jumper my positive terminal of my coil to my battery nothing happens. I see a little arc when I attempt to connect the wires. There is not attempt for the starter to turn over. I know my battery is fully charged too.

Paul

Paul
Parker, Colorado
56 BelAir Post, T56, 327, 4:11, Astro custom chrome steel wheels,
http://tinyurl.com/56belair


 
acardon 
Ultra Senior Member
Posts: 11292
acardon
Loc: DFW TEXAS
Reg: 03-25-05
06-03-19 09:54 AM - Post#2767601    
    In response to Denver56BelAir

Jumpering to the coil only ensures a positive voltage to the coil all the time. You have to turn the key to crank it, with the jumper in place. If it then starts, you have to remove the jumper to kill the engine.
If it starts with the jumper, you have a bad ignition switch or a bad connection between the switch and coil.

Don
66 Corvair (driving)
57 2dr HT (driving)
56 2dr HT (waiting to be restored)


 
Mel Foye 
*VIP* Founding Member
Posts: 4886
Mel Foye
Reg: 09-29-00
06-04-19 03:14 PM - Post#2767702    
    In response to acardon

acardon if this thing don't start it won't be from you not really trying to pitch in.



 
Denver56BelAir 
Senior Member
Posts: 539
Denver56BelAir
Loc: Parker, Colorado
Reg: 01-11-05
06-05-19 11:06 AM - Post#2767755    
    In response to Mel Foye

I jumped the positive coil to the battery, the car fired right up. I took off the jumper and drove it around. What's next?

Paul
Parker, Colorado
56 BelAir Post, T56, 327, 4:11, Astro custom chrome steel wheels,
http://tinyurl.com/56belair


 
acardon 
Ultra Senior Member
Posts: 11292
acardon
Loc: DFW TEXAS
Reg: 03-25-05
06-05-19 12:10 PM - Post#2767763    
    In response to Denver56BelAir

  • Quote:
If it starts with the jumper, you have a bad ignition switch or a bad connection between the switch and coil.




Ignition 2 terminal on the switch supplies power to the coil while cranking. Either the switch is bad or the connection on ign2 is loose.

Don
66 Corvair (driving)
57 2dr HT (driving)
56 2dr HT (waiting to be restored)


 
Denver56BelAir 
Senior Member
Posts: 539
Denver56BelAir
Loc: Parker, Colorado
Reg: 01-11-05
06-06-19 10:47 AM - Post#2767835    
    In response to acardon

I checked the connection on the switch, it's fastened just fine. I'n not sure if the rest of the wire goes through a harness up to the coil. Thoughts?

I've had several bad light switches, not sure if I replaced the ignition switch before.

Paul
Parker, Colorado
56 BelAir Post, T56, 327, 4:11, Astro custom chrome steel wheels,
http://tinyurl.com/56belair


 
acardon 
Ultra Senior Member
Posts: 11292
acardon
Loc: DFW TEXAS
Reg: 03-25-05
06-06-19 11:23 AM - Post#2767837    
    In response to Denver56BelAir

Put a test light or meter on the ign2 terminal (dark green wires) and see if you have voltage while cranking....without the jumper from the battery to coil. If you don't have voltage, the switch is bad.

Don
66 Corvair (driving)
57 2dr HT (driving)
56 2dr HT (waiting to be restored)


 
Belair-o 
Contributor
Posts: 134

Reg: 03-26-07
06-07-19 05:20 AM - Post#2767870    
    In response to acardon

What an incredible resource Don is to ChevyTalk!



 
Tony 
Founder & Grand PoohBah
Posts: 18198
Tony
Age: 62
Loc: Orange County CA.
Reg: 03-15-99
06-09-19 10:44 AM - Post#2768043    
    In response to Belair-o

Hence his VIP status.

Happy with the help and support you got here?
Click >>here<< to become a Supporting Member or Donate







 
Denver56BelAir 
Senior Member
Posts: 539
Denver56BelAir
Loc: Parker, Colorado
Reg: 01-11-05
06-09-19 12:59 PM - Post#2768053    
    In response to Tony

Don, I don't have enough hands to do this test you ask. . Can I assume the switch is bad? Tell me, one of the green wires goes to the resistor, the other goes to the coil. I can tell the wires from the resistor to the ignition 2 terminal and the wire going from the coil to the ignition 2 terminal are fastened.



Paul
Parker, Colorado
56 BelAir Post, T56, 327, 4:11, Astro custom chrome steel wheels,
http://tinyurl.com/56belair


 
Denver56BelAir 
Senior Member
Posts: 539
Denver56BelAir
Loc: Parker, Colorado
Reg: 01-11-05
06-09-19 01:18 PM - Post#2768056    
    In response to Denver56BelAir

I checked again. The wire from the bottom of the resistor was removed from the ignition 2 terminal. I attached the wire, the car fired up. Thanks everyone

Paul

Paul
Parker, Colorado
56 BelAir Post, T56, 327, 4:11, Astro custom chrome steel wheels,
http://tinyurl.com/56belair


 
WyrTwister 
Poster
Posts: 32

Loc: South Central USA
Reg: 09-20-15
06-10-19 05:29 AM - Post#2768095    
    In response to Denver56BelAir

Congrats on the repair ! :-)

Wyr
God bless

God bless
Wyr


 
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