No Spark to the coil
No Spark to the coil
I reinstalled the factory 305 back in my Camaro. The cars turns but no spark to the coil. I’ve replaced the ICM, rotor is good, replaced the coil and check those cables to make sure they are good and they are.
Still not getting spark, anyone have another place to look
Still not getting spark, anyone have another place to look
Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: No Spark to the coil
What’s the acv from pu coil to icm ? Icm has power to it ?
Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: No Spark to the coil
As the engine is cranking, the AC voltage readings should fluctuate between 0.3 Volts and 1.8 Volts AC
Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: No Spark to the coil
From the pickup coil, unplugged from the icm. What has your testing consisted of ? The ignition coil primary and secondary windings were ohmed and determined faulty ?
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Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: No Spark to the coil
so you don’t know if the pink wire at coil has power key on engine off or cranking .Or power at the icm ? Sounds like you’re just loading up the parts cannon hoping to find the issue.
Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: No Spark to the coil
so not even tpi, your in the wrong section.
unplug the jumper from coil to icm see if pink wire has power key on and cranking. If it does ohm or test pickup coil while cranking pu coil ohm.500 to 1500 ohm range
unplug the jumper from coil to icm see if pink wire has power key on and cranking. If it does ohm or test pickup coil while cranking pu coil ohm.500 to 1500 ohm range
Last edited by Tuned Performance; Mar 24, 2024 at 04:04 PM.
Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: No Spark to the coil
You can just replace pickup coil, you have to remove and disassemble the distributor. It looks relatively new but despite it’s looks it should give a ohm reading and ac voltage while cranking.red lead on the com seems to be in the wrong spot.
Last edited by Tuned Performance; Mar 24, 2024 at 04:34 PM.
Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: No Spark to the coil
How was spark tested ? Coil wire have really high resistance or open. By saying the wire ohms good how much resistance?
any change if tach is unplugged and test for spark ?
any change if tach is unplugged and test for spark ?
Re: No Spark to the coil
Thanks again for your help
Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: No Spark to the coil
Vom is a volt ohm meter, the lead in read is in the spot for reading amps dc.
Re: No Spark to the coil
I went and bought a better unit,
When I reinstall the plug with the Ingnition switch still on, I hear the fuel pump kick in.
I’m getting gas just no fire.
As for trying to get spark, took a spare spark plug and hooked it to the coil plug to see if I got a spark. That’s how I checked it.
Does the ECM need to be reset?
Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: No Spark to the coil
The spark plug was grounded when cranking the engine? The ecm doesn’t need a reset .
Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: No Spark to the coil
If the coil wire is good, you have checked acv on the pu coil. Ignition coil ohms good primary and secondary windings. It is possible that the new distributor has a bad icm.
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