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  #1  
Old 09-19-2017, 06:02 PM
bkilby bkilby is offline
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No Spark

Hey guys. I have this '87 Wag sitting here that was running...then stopped. I was driving it around the block and all was fine then it died with no more starting. It cranks but no spark. Fuel is fine. The two wires going to the coil both have 12V going to them. I changed out the ignition box for another that was sitting around and even changed the coil. Still no spark.

What are the most common things to look for? It has the 360 with the Ford style distributor. I'm not familiar with this ignition setup.
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  #2  
Old 09-19-2017, 06:19 PM
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pickup coil inside distributor or wires to pickup coil.
cheap easy to replace.
a good one will register ~600-900 ohms between two pickup wires.
many time the wires break internally from decades of flexing, can't always see it.
the duraspark style connectors are also crap.
couple minutes and some weatherpack connectors cure that.
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'88 GW (aka Babywag) and '90 GW (aka JUNKbucket) both fuel injected
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  #3  
Old 09-20-2017, 09:03 AM
bkilby bkilby is offline
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Thanks Tony. I'll look into that distributor and it's wiring. Having 12V going to both wires on the coil is normal?
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Old 09-20-2017, 10:50 AM
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I wouldn't worry about coil showing 12v on both sides.
It isn't abnormal to see 12v on both sides, in certain circumstances.

If you hook a test light to coil terminals, and crank the engine, does it pulsate? Or just stay lit?
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'88 GW (aka Babywag) and '90 GW (aka JUNKbucket) both fuel injected
1994 Caprice wagon
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  #5  
Old 09-20-2017, 04:38 PM
bkilby bkilby is offline
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Quote:
Originally Posted by babywag
I wouldn't worry about coil showing 12v on both sides.
It isn't abnormal to see 12v on both sides, in certain circumstances.

If you hook a test light to coil terminals, and crank the engine, does it pulsate? Or just stay lit?

If you're talking about the two wires going to the coil, they both pulsate when cranking. I'm going to try testing the dizzy like you mentioned.
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  #6  
Old 09-20-2017, 05:33 PM
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If light flashes the pickup is telling the coil to fire.
No spark from coil in this situation suggests a bad coil.
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'88 GW (aka Babywag) and '90 GW (aka JUNKbucket) both fuel injected
1994 Caprice wagon
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  #7  
Old 09-20-2017, 06:06 PM
bkilby bkilby is offline
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Copy that. The pickup coil measured 506 ohms. We're fixing some wiring then we'll try again. If the coil is bad, that means I have 2 bad coils. Lol. Can I use a regular coil just to see if it starts or is that a bad idea?
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Old 09-20-2017, 06:32 PM
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yes regular 12v coil is fine
resistance wire in the circuit drops voltage when running
I've gotten a LOT of bad brand new ignition parts in recent years.
Had better luck with used OEM junkyard stuff...sigh
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'88 GW (aka Babywag) and '90 GW (aka JUNKbucket) both fuel injected
1994 Caprice wagon
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  #9  
Old 09-20-2017, 06:50 PM
bkilby bkilby is offline
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When I tested those two wires, the battery was getting a little low so I charged it up for a bit. Now I test those two wires and they are not flickering but staying on steady. I'm guessing the pickup coil in the dizzy?
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Old 09-20-2017, 07:22 PM
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yes, probably.
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'88 GW (aka Babywag) and '90 GW (aka JUNKbucket) both fuel injected
1994 Caprice wagon
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  #11  
Old 09-20-2017, 11:04 PM
bkilby bkilby is offline
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Ordered a new (rebuilt) dizzy from NAPA. $54.00. Should be here tomorrow. They wanted $42.00 just for the pickup coil. I'll see what happens then. I really hate to spend money on this rig as it's not mine and I'm just trying to help a friend sell it. It does have some cool stuff on it though.
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Old 09-21-2017, 08:09 AM
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swap on the old distributor gear to new one just to be safe.
standard sells a pickup ~$20 if you're not in a rush or have a parts house that sells their brand.
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'88 GW (aka Babywag) and '90 GW (aka JUNKbucket) both fuel injected
1994 Caprice wagon
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  #13  
Old 09-22-2017, 03:07 PM
bkilby bkilby is offline
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Well the new dizzy didn’t help. I’ve tried 3 coils and no spark. I’ve tried 2 (condition unknown) ignition modules. What next? Lol.
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Last edited by bkilby : 09-22-2017 at 05:35 PM.
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  #14  
Old 09-22-2017, 03:31 PM
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wiring troubles?
too bad you're not closer. maybe this was reason it got parked?
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'88 GW (aka Babywag) and '90 GW (aka JUNKbucket) both fuel injected
1994 Caprice wagon
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  #15  
Old 09-22-2017, 04:12 PM
bkilby bkilby is offline
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We’ve chased and checked all wires. Only issue I see is no resistor wire.
One coil tested bad, 2nd tested good. All indicators are pointing to the ignition
Module. I think...
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Old 09-22-2017, 04:19 PM
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i used to have several junkyard spares new aftermarket ones are no good imho
some parts stores can still test them
check power @ 2-wire module connector yet?
one should have 12v while cranking
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'88 GW (aka Babywag) and '90 GW (aka JUNKbucket) both fuel injected
1994 Caprice wagon
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  #17  
Old 09-22-2017, 04:32 PM
bkilby bkilby is offline
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Yeah, just checked. The red wire on the module goes to yellow, to the coil positive. Tested the red wire with a Power Probe. 10.5V while cranking. The white wire turns to green with tracer which goes to coil negative. Tested the white wire and it goes to 10.5V positive when cranking. Grounded when not cranking.

Check all 3 wires from dizzy to module and all have complete circuits.

Wire problems is definitely why this rig was parked. That and old stinky fuel. Lol.
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  #18  
Old 09-22-2017, 04:42 PM
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go grab oem module from boneyard lolz
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'88 GW (aka Babywag) and '90 GW (aka JUNKbucket) both fuel injected
1994 Caprice wagon
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  #19  
Old 09-22-2017, 05:06 PM
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Maybe your rotor died?
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  #20  
Old 09-22-2017, 05:32 PM
bkilby bkilby is offline
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Problem is solved. It was the ignition module. The made in China unit from NAPA works. Lol. We went back and tested the other two, just in case and yup, neither one works. <sigh> Well, I'm sure it needed a new distributor anyhow!

Thanks for all your input and help babywag!
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