Ti ignition problems
Thread Starter
Intermediate
Joined: Oct 2017
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Yeah, a resistor in a circuit will appear "invisible" when the wire is open circuited.
If you can get a clean ignition supply to that white wire let us know what the voltages are in the circuit, particularly the voltage across the coil (C+ to C-).
Heading out to dinner right now, I'll check in later on. Good luck.
If you can get a clean ignition supply to that white wire let us know what the voltages are in the circuit, particularly the voltage across the coil (C+ to C-).
Heading out to dinner right now, I'll check in later on. Good luck.
69427,
thank you for the help. I will work on it tomorrow morning and submit a reply by late morning
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Tech Contributor
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From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
I don't have the wiring diagram immediately handy, but I just took a peek at my horn relay, and there's a couple rather large red wires attached to it, so I would assume there's a rather low impedance source feeding those wires. Once you've run a jumper to the relay, let us know what the voltages are at the different points in the circuit.
Thread Starter
Intermediate
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So I think I verified that there is a resistance wire from the ignition module pink wire to the white wire of the TI ignition. Here are the comparisons:
Ignition pink wire readings with key on:
a) 8.9v @ white wire
b) + coil to ground 2.65v
c) + coil to - coil 2.4v
d) yellow wire 5.81v
Jumper wire from horn relay key on:
a) 12.4v @ white wire
b) + coil to ground 3.72v
c)+ coil to - coil 3.39v
d)Yellow wire 7.9v
Let me know what you think
Ignition pink wire readings with key on:
a) 8.9v @ white wire
b) + coil to ground 2.65v
c) + coil to - coil 2.4v
d) yellow wire 5.81v
Jumper wire from horn relay key on:
a) 12.4v @ white wire
b) + coil to ground 3.72v
c)+ coil to - coil 3.39v
d)Yellow wire 7.9v
Let me know what you think
Le Mans Master
Joined: Oct 2006
Posts: 7,123
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From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
I finally got home and a chance to look. The wire from the starter "R" terminal plugs into the pink wire at the distributor connector pigtail. NOT the coil as I had thought. (My bad. That's what you get going from memory)
Tech Contributor
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From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
So I think I verified that there is a resistance wire from the ignition module pink wire to the white wire of the TI ignition. Here are the comparisons:
Ignition pink wire readings with key on:
a) 8.9v @ white wire
b) + coil to ground 2.65v
c) + coil to - coil 2.4v
d) yellow wire 5.81v
Jumper wire from horn relay key on:
a) 12.4v @ white wire
b) + coil to ground 3.72v
c)+ coil to - coil 3.39v
d)Yellow wire 7.9v
Let me know what you think
Ignition pink wire readings with key on:
a) 8.9v @ white wire
b) + coil to ground 2.65v
c) + coil to - coil 2.4v
d) yellow wire 5.81v
Jumper wire from horn relay key on:
a) 12.4v @ white wire
b) + coil to ground 3.72v
c)+ coil to - coil 3.39v
d)Yellow wire 7.9v
Let me know what you think
b) Looks okay.
c) Looks good. That level of voltage across the coil calculates out to about 6-7 amps going through the primary windings. That's the number I believe that system is designed to operate at.
d) I'm not finding a yellow wire in the system drawing, so I'm not sure where that reading is at. Is it the wire immediately out of the module that feeds the coil C+ through the ballast wire?
Thread Starter
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a) Looks good.
b) Looks okay.
c) Looks good. That level of voltage across the coil calculates out to about 6-7 amps going through the primary windings. That's the number I believe that system is designed to operate at.
d) I'm not finding a yellow wire in the system drawing, so I'm not sure where that reading is at. Is it the wire immediately out of the module that feeds the coil C+ through the ballast wire?
b) Looks okay.
c) Looks good. That level of voltage across the coil calculates out to about 6-7 amps going through the primary windings. That's the number I believe that system is designed to operate at.
d) I'm not finding a yellow wire in the system drawing, so I'm not sure where that reading is at. Is it the wire immediately out of the module that feeds the coil C+ through the ballast wire?
Tech Contributor
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Posts: 20,860
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From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
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From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
Your car, and your decision certainly, but I'm a bit unclear about if there's additional issues that need addressing. The latest voltage readings appear to be correct. Will the engine start now if you crank it over?
(FWIW, the other drawing showing how to connect up an HEI module is the system I've been running the past 30 some years. The HEI is made to operate on the same signal that the TI distributor generates.)
Let us know if you continue, and try starting the engine.
(FWIW, the other drawing showing how to connect up an HEI module is the system I've been running the past 30 some years. The HEI is made to operate on the same signal that the TI distributor generates.)
Let us know if you continue, and try starting the engine.
Thread Starter
Intermediate
Joined: Oct 2017
Posts: 49
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Your car, and your decision certainly, but I'm a bit unclear about if there's additional issues that need addressing. The latest voltage readings appear to be correct. Will the engine start now if you crank it over?
(FWIW, the other drawing showing how to connect up an HEI module is the system I've been running the past 30 some years. The HEI is made to operate on the same signal that the TI distributor generates.)
Let us know if you continue, and try starting the engine.
(FWIW, the other drawing showing how to connect up an HEI module is the system I've been running the past 30 some years. The HEI is made to operate on the same signal that the TI distributor generates.)
Let us know if you continue, and try starting the engine.
I’ve tried starting, cranks but no spark. Put a second amplifier with updated module in and still no spark. Would you mind giving me some info about your HEI module and I’ll look into buying one. Thanks for all your help.
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From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
Edit: I'm back. Glad to help you out with any HEI info, but I hate to give up on the TI setup while the actual pinpoint problem is still unknown. It should be reasonably straightforward to do some simple tests of each segment of the TI system to see if we can identify which segment (supply voltage/wiring, pickup coil, module, ignition coil, distributor/rotor/cap, etc) is the problem.
Again, your call.
Last edited by 69427; Nov 5, 2017 at 08:17 PM. Reason: Added content.
Thread Starter
Intermediate
Joined: Oct 2017
Posts: 49
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Yeah. Gotta go take care of some stuff for a quick bit, but I'll get back to this thread shortly.
Edit: I'm back. Glad to help you out with any HEI info, but I hate to give up on the TI setup while the actual pinpoint problem is still unknown. It should be reasonably straightforward to do some simple tests of each segment of the TI system to see if we can identify which segment (supply voltage/wiring, pickup coil, module, ignition coil, distributor/rotor/cap, etc) is the problem.
Again, your call.
Edit: I'm back. Glad to help you out with any HEI info, but I hate to give up on the TI setup while the actual pinpoint problem is still unknown. It should be reasonably straightforward to do some simple tests of each segment of the TI system to see if we can identify which segment (supply voltage/wiring, pickup coil, module, ignition coil, distributor/rotor/cap, etc) is the problem.
Again, your call.
69427,
I would love to solve this. If you have some ideas I’m still game.
Melting Slicks
Joined: Oct 2001
Posts: 2,064
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From: Halifax, Nova Scotia, Canada
In post #14 I mentioned this, seems like a good time to mention again.
When I upgraded to the new TI amp board, I would get NO spark while cranking. I fixed this by...................................
Disconnecting the "R" wire from the starter to the TI harness. It makes no sense, however that fixed the problem.
When I upgraded to the new TI amp board, I would get NO spark while cranking. I fixed this by...................................
Disconnecting the "R" wire from the starter to the TI harness. It makes no sense, however that fixed the problem.
Melting Slicks
Joined: Oct 2001
Posts: 2,064
Likes: 1,382
From: Halifax, Nova Scotia, Canada
Thread Starter
Intermediate
Joined: Oct 2017
Posts: 49
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In post #14 I mentioned this, seems like a good time to mention again.
When I upgraded to the new TI amp board, I would get NO spark while cranking. I fixed this by...................................
Disconnecting the "R" wire from the starter to the TI harness. It makes no sense, however that fixed the problem.
When I upgraded to the new TI amp board, I would get NO spark while cranking. I fixed this by...................................
Disconnecting the "R" wire from the starter to the TI harness. It makes no sense, however that fixed the problem.
Barry,
I was just thinking about that post. I’m to that point. I’ll give it a try. Do you know why it corrected the problem?
Thread Starter
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Melting Slicks
Joined: Oct 2001
Posts: 2,064
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From: Halifax, Nova Scotia, Canada
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From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
In my car I have a simple (but genuine DELCO) HEI four terminal module on a small heat sink attached inside the ignition shield by a small machine screw, using one of the already available holes in the shielding. I'm also using the stock 48 year old points coil (sans ballast resistance) attached to the HEI module. The points are long gone, replaced by an aftermarket variable reluctance pickup coil in the distributor. The system has been stone reliable/ bulletproof for several decades.