No spark… possible distributor failure?
Cargo Master
Joined: Mar 2008
Posts: 2,568
Likes: 207
From: Washington
I am not sure I would see this as causing a no run condition. As long as the Pulses from the distributor reach the ignition module, it should work.
Jim
Cargo Master
Joined: Mar 2008
Posts: 2,568
Likes: 207
From: Washington
Does "no reading" mean infinite resistance?
This loop should not be connected to ground, it should be isolated from ground.
From Google....
Infinite resistance refers to a condition in an electrical circuit where no current can flow, typically indicated by an open circuit. In practical terms, it means that the resistance is so high that it is considered effectively infinite, often shown as "OL" (over limit) on a multimeter.
This loop should not be connected to ground, it should be isolated from ground.
From Google....
Infinite resistance refers to a condition in an electrical circuit where no current can flow, typically indicated by an open circuit. In practical terms, it means that the resistance is so high that it is considered effectively infinite, often shown as "OL" (over limit) on a multimeter.
Moderator
Joined: Jan 2001
Posts: 56,984
Likes: 2,738
From: Virginia
Like was said, no reading is good. No reading would be greater than 70,000 ohms correct? If you hold the meter terminals apart in the air, you get "no reading" or like was mentioned infinity. In other words very very high ohms which is beyond the ability of the meter, which is what you want. You want these two wires to not be grounded.
Cargo Master
Joined: Mar 2008
Posts: 2,568
Likes: 207
From: Washington
I don't think there's anything wrong with your harness.
Reconnect everything and do something voltage testing with the key ON. Engine not running.
Is your DS2 ignition module getting power on the red wire, in the 2 wire plug?
Check voltage at the at the coil positive.
Jim
Reconnect everything and do something voltage testing with the key ON. Engine not running.
Is your DS2 ignition module getting power on the red wire, in the 2 wire plug?
Check voltage at the at the coil positive.
Jim
Cargo Master
Joined: Mar 2008
Posts: 2,568
Likes: 207
From: Washington
So ... if you see rub marks, replace your distributor.
Good luck, Jim
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Thread Starter
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Mountain Pass
Joined: Nov 2016
Posts: 105
Likes: 2
Well, I’m baffled by this situation now. All tests check out in my favour, yet I continue to have no spark. The pick up coil checks out good. The positive side of the coil tests at 6.86V. Gets warm when key left on. There’s power going to the ICM red wire. All red wires test power on with test light. There is a gap at the pickup coil, no rubbing. There’s even the sound of spark when I move the pickup coil slightly toward the reluctor wheel (very small play here). I don’t understand what this might be. Starter solenoid? Key ignition switch? Bizzarre!
FTE Legend
Joined: Nov 2015
Posts: 30,912
Likes: 4,123
From: Angier, NC
You may have power to everything but to get spark the power have to stop to the NEG side of the coil and if I understand correctly the ICM / box dose this.
Also the ICM / box gets this from the pickup coil in the distributor. I know you checked it with a meter as pre the book but wonder if you can test to opening & breaking of the field?
Dave ----
Also the ICM / box gets this from the pickup coil in the distributor. I know you checked it with a meter as pre the book but wonder if you can test to opening & breaking of the field?
Dave ----
Tuned
Joined: Dec 2024
Posts: 445
Likes: 94
From: Texas, near Houston
[QUOTE=FuzzFace2;21593494]You may have power to everything but to get spark the power have to stop to the NEG side of the coil and if I understand correctly the ICM / box dose this.
Also the ICM / box gets this from the pickup coil in the distributor. I know you checked it with a meter as pre the book but wonder if you can test to opening & breaking of the field?
Also the ICM / box gets this from the pickup coil in the distributor. I know you checked it with a meter as pre the book but wonder if you can test to opening & breaking of the field?
Cargo Master
Joined: Mar 2008
Posts: 2,568
Likes: 207
From: Washington
Well, I’m baffled by this situation now. All tests check out in my favour, yet I continue to have no spark. The pick up coil checks out good. The positive side of the coil tests at 6.86V. Gets warm when key left on. There’s power going to the ICM red wire. All red wires test power on with test light. There is a gap at the pickup coil, no rubbing. There’s even the sound of spark when I move the pickup coil slightly toward the reluctor wheel (very small play here). I don’t understand what this might be. Starter solenoid? Key ignition switch? Bizzarre!
Test for spark at the coil wire, it been said that you can hit the distributor with a screw driver handle and create a single spark. I think that this is from kr98664, it's not something I have ever tried. It seems a little magical to me.
How much play in the rotor? Is the rotor going around? Did the shear pin break on the distributor gear?
If it makes you feel any better.... It should work, based on your testing.
Jim
Moderator
Joined: Jan 2001
Posts: 56,984
Likes: 2,738
From: Virginia
You are correct, your tests check out good.
Test for spark at the coil wire, it been said that you can hit the distributor with a screw driver handle and create a single spark. I think that this is from kr98664, it's not something I have ever tried. It seems a little magical to me.
How much play in the rotor? Is the rotor going around? Did the shear pin break on the distributor gear?
If it makes you feel any better.... It should work, based on your testing.
Jim
Test for spark at the coil wire, it been said that you can hit the distributor with a screw driver handle and create a single spark. I think that this is from kr98664, it's not something I have ever tried. It seems a little magical to me.
How much play in the rotor? Is the rotor going around? Did the shear pin break on the distributor gear?
If it makes you feel any better.... It should work, based on your testing.
Jim
Thread Starter
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Mountain Pass
Joined: Nov 2016
Posts: 105
Likes: 2
You are correct, your tests check out good.
Test for spark at the coil wire, it been said that you can hit the distributor with a screw driver handle and create a single spark. I think that this is from kr98664, it's not something I have ever tried. It seems a little magical to me.
How much play in the rotor? Is the rotor going around? Did the shear pin break on the distributor gear?
If it makes you feel any better.... It should work, based on your testing.
Jim
Test for spark at the coil wire, it been said that you can hit the distributor with a screw driver handle and create a single spark. I think that this is from kr98664, it's not something I have ever tried. It seems a little magical to me.
How much play in the rotor? Is the rotor going around? Did the shear pin break on the distributor gear?
If it makes you feel any better.... It should work, based on your testing.
Jim
Could the ignition switch on the steering column give a no spark situation?
Moderator
Joined: Jan 2001
Posts: 56,984
Likes: 2,738
From: Virginia
A bit of up and down and side to side play in the rotor shaft. Nothing excessive. Sheer pin intact. Dizzy spinning the rotor as normal. I’ve tried another coil also with no change. Wiring is good, no oxidation/corrosion at connections.
Could the ignition switch on the steering column give a no spark situation?
Could the ignition switch on the steering column give a no spark situation?
