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problems with ignition switch
Problem for Chevrolet Cars
Generic problem for all Chevrolet Chevy Cars
No Spark from coil
By StevefromTN on Jun 08, 2008
1956 Chevy Nomad 327 small block, mallory magnetic breakerless dist., promaster coil, mallory 8 mm wires, recently rewired entire car during restoration. voltages check out ok with switch off no voltage on coil, with switch in on about 3 volts on + side of coil, when cranking voltage is ~12 volts but no spark have replaced the distributor (with new one) new promaster coil, rechecked ignition circuit wiring all per diagram. Still no spark. Pulled promaster coil from another classic car I have and put in and it started up. After shutting down it went back to no spark.
Comments:
Jun 08, 2008
- You are right it was 12 .5 volts, must of had a brain dead moment.if I can I will attach three diagrams of the wiring circuits (Word format)I used to wire and check.
Same Problem
Jan 03, 2009
- Ihave the same problem but even if Itake the ballast resetior out of the circuit Ionly have about 2.5 volts with the module plugged up but if I unplug the module volts goes to 12 volts - jsullivan18Jul 05, 2008
- Iam currently restoring a 1951 ford pick up . It has a big block chevy with Mallory unilite electronic ignition distributor and Mallory Promaster coil. The problem I am having is no spark. When the ignition switch is in the on position and the distributor harness (3 wires) is unplugged from distributor to coil, I get 12 volts to the ballast resistor and 12 volts coming out of the ballast resistor to the coil. I also get 12 volts at the negative side of the coil. When the distributor harness is reconnected to the coil, I get 5 volts at the positive side of coil and 1 at the negative side. Also the Ballst resistor gets real hot. I have already replaced the ignition module in the distributor, and I am still having the same problem. Please help, I am getting frustrated. - Gregs 51Best Solution
posted on Jun 08, 2008
i don't beleve 3 volt is enaf for the coil it has to be at least 9 volts
if this car has a resistor on the car or on the circuit going from ignition switch to ignition coil replace it, but if it does not have one then it has to have one built in the circuit wish is going to be very hard to find i will recomed you to get straight ignition power from ignition sw, to an aftermarket ignition resistor and from there to the positive side of ignition coil,
but also let me know what promaster means? is that the brand? or is that a performance coil?
and does your car has elecgtronic? or points system ignition distribuitor.
if this car has a resistor on the car or on the circuit going from ignition switch to ignition coil replace it, but if it does not have one then it has to have one built in the circuit wish is going to be very hard to find i will recomed you to get straight ignition power from ignition sw, to an aftermarket ignition resistor and from there to the positive side of ignition coil,
but also let me know what promaster means? is that the brand? or is that a performance coil?
and does your car has elecgtronic? or points system ignition distribuitor.
Yes
No
Solution #2
posted on Jun 14, 2009
I have problem with coil not working.
In the morning,car with not start, but if I run
a wire from battery to (+) to coil (+) will start. the rest of day no problem,car will start.
but next morning same problem no spark from coil.
c
In the morning,car with not start, but if I run
a wire from battery to (+) to coil (+) will start. the rest of day no problem,car will start.
but next morning same problem no spark from coil.
c
Yes
No
This Problem Also Relates To:
2004 Chevrolet TrailBlazer
1997 Chevrolet Cavalier
1997 Chevrolet Blazer
2001 Chevrolet Malibu
1998 Chevrolet Malibu
1996 Chevrolet Camaro
1999 Chevrolet Cavalier
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