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Starting
#1
I parked my 73 about two weeks ago and went to start it up the next day to take it to work and it wouldnt start. I didnt worry about it because i didnt have time but when i got home from work i looked under the hood. I couldnt find anything wrong but thats just me. I went through the PO maintenance records and discovered that almost the entire ignition system was from the factory. I started gathering parts and replacing them one at a time. Ive replaced damn near everything and it still won't run. What am i missing?

Replaced parts:
Starter
Starter solenoid
Alternator
Positive and negative battery cables
Plugs
Wires
Coil
Ignition switch
Cap and rotor
Condensor
Points
Brand new distributor after point, condensor, cap, and rotor didnt work
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#2
With the key in the ON position do you have voltage at the + terminal of the coil?
When you look in the carb and move the accelerator cable, do you see gas come out of the discharge nozzle?
I'm assuming it turns over with the starter but will not start.
Chuck
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#3
c9zx;281991 Wrote:With the key in the ON position do you have voltage at the + terminal of the coil?
When you look in the carb and move the accelerator cable, do you see gas come out of the discharge nozzle?
I'm assuming it turns over with the starter but will not start.
Chuck

I get 12v at the coil getting spark and fuel. IM assuming im getting compression because it is difficult to turn over by hand when finding TDC on cylinder one.
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#4
3 things are required for an operational engine to run: air, fuel, and spark. However, the air and fuel have to be in the correct quantities and the spark has to be properly synchronized.

My first guess is lack of fuel, assuming that you gapped the points (set dwell) correctly when you changed them, the spark plug wires were installed correctly in firing order, and the spark plugs have the correct gap. Did you check to make sure you have spark when cranking the engine?

After changing the distributor you will also have to make sure the rotor is pointing to #1 terminal when the number one piston is near top-dead-center of the compression stroke and that timing is correct.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
  Reply
#5
Don C;281994 Wrote:3 things are required for an operational engine to run: air, fuel, and spark. However, the air and fuel have to be in the correct quantities and the spark has to be properly synchronized.

My first guess is lack of fuel, assuming that you gapped the points (set dwell) correctly when you changed them, the spark plug wires were installed correctly in firing order, and the spark plugs have the correct gap. Did you check to make sure you have spark when cranking the engine?

After changing the distributor you will also have to make sure the rotor is pointing to #1 terminal when the number one piston is near top-dead-center of the comjipression stroke and that timing is correct.

It gets fuel. Plug wires are correct. There is no spark coming from the coil. Could it be in backwards?
  Reply
#6
Digdugjake;281992 Wrote:
c9zx;281991 Wrote:With the key in the ON position do you have voltage at the + terminal of the coil?
When you look in the carb and move the accelerator cable, do you see gas come out of the discharge nozzle?
I'm assuming it turns over with the starter but will not start.
Chuck

I get 12v at the coil getting spark and fuel. IM assuming im getting compression because it is difficult to turn over by hand when finding TDC on cylinder one.
You are getting consistent spark at the plugs or does it seem hit and miss?
  Reply
#7
c9zx;281997 Wrote:
Digdugjake;281992 Wrote:
c9zx;281991 Wrote:With the key in the ON position do you have voltage at the + terminal of the coil?
When you look in the carb and move the accelerator cable, do you see gas come out of the discharge nozzle?
I'm assuming it turns over with the starter but will not start.
Chuck

I get 12v at the coil getting spark and fuel. IM assuming im getting compression because it is difficult to turn over by hand when finding TDC on cylinder one.
You are getting consistent spark at the plugs or does it seem hit

Havent checked every plug cylinder 1 is consistent with the old coil
  Reply
#8
Digdugjake;281996 Wrote:
Don C;281994 Wrote:3 things are required for an operational engine to run: air, fuel, and spark. However, the air and fuel have to be in the correct quantities and the spark has to be properly synchronized.

My first guess is lack of fuel, assuming that you gapped the points (set dwell) correctly when you changed them, the spark plug wires were installed correctly in firing order, and the spark plugs have the correct gap. Did you check to make sure you have spark when cranking the engine?

After changing the distributor you will also have to make sure the rotor is pointing to #1 terminal when the number one piston is near top-dead-center of the comjipression stroke and that timing is correct.

It gets fuel. Plug wires are correct. There is no spark coming from the coil. Could it be in backwards?
Pull the new coil wire from the cap and make sure the wire end was fully installed through the 90 degree boot.
  Reply
#9
Looks like I took too long to type my reply.

Pull a spark plug to make sure it's not wet with fuel (flooded). This time of the year requires proper operation of the choke.

Connect a timing light and make sure you're getting spark 6 - 10° BTDC on #1.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
  Reply
#10
c9zx;281999 Wrote:
Digdugjake;281996 Wrote:
Don C;281994 Wrote:3 things are required for an operational engine to run: air, fuel, and spark. However, the air and fuel have to be in the correct quantities and the spark has to be properly synchronized.

My first guess is lack of fuel, assuming that you gapped the points (set dwell) correctly when you changed them, the spark plug wires were installed correctly in firing order, and the spark plugs have the correct gap. Did you check to make sure you have spark when cranking the engine?

After changing the distributor you will also have to make sure the rotor is pointing to #1 terminal when the number one piston is near top-dead-center of the comjipression stroke and that timing is correct.

It gets fuel. Plug wires are correct. There is no spark coming from the coil. Could it be in backwards?
Pull the new coil wire from the cap and make sure the wire end was fully installed through the 90 degree boot.

It is. I checked all of them.
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