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Old 05-25-2018, 12:40 PM   #1
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Unhappy 87 Eldorado Prelude - no spark issue

Hi All,
I have an 87 Eldorado Prelude Motor home built on an 86 E350 Ford chassis, I had trouble with the neutral safety switch, so I replaced it. All went south from there. I now have no spark at the spark plugs. I have replaced the cap, rotor, ignition module, ignition coil, distributor( to replace the pickup coil), spark plugs and wires. Still no sparky. If anyone has had this issue I am open to suggestions.
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Old 05-25-2018, 01:22 PM   #2
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Is the distributer turning ? Broken timming chain.
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Old 05-25-2018, 04:31 PM   #3
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Hi ! Welcome to IRV2! We're sure glad you joined the gang!

Good luck, happy trails, and God bless!
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Old 05-25-2018, 09:14 PM   #4
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Glad to have you here in the forum with us. You're gonna like it here.

Take the distributor cap off and have someone crank it and see if the rotor is turning. How far are you getting voltage. Can you determine where it stops? Also has it run after you replaced the neutral safety switch?

Happy Trails!!!
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Old 05-25-2018, 10:31 PM   #5
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I would say if this all started after you replace the NSS, then start there! Bypass it, see if you get spark, and it starts! You can get a bad switch right out of the box! JMHO! Rail!
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Old 05-26-2018, 10:25 AM   #6
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Thanks for the suggestions

We have ordered a new neutral safety switch. Thanks for the suggestions and pointers. In answer to a couple of the questions raised.
The issue started right after we replaced. I am wishing I would have considered that possibility that the new switch was bad. We have now replaced everything in the mix including the distributor. The new one should be here this afternoon.

Thanks for all the responses and suggestions

Freetrapper
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Old 05-26-2018, 04:59 PM   #7
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Replaced NSS again

We got the new NSS and before I installed it completely we decided to connect it and test to see what we got. We got all excited it seemed to want to start. So I installed it and now we are back to no spark.

We have checked all the basics, the rotor is turning. The timing is obviously off since we can not get it to run to set that. We have voltage at the connector going to the NSS. I pulled one of the spark plug wires and put a spark plug in it then touched it to the engine to test for spark. No Joy. We tested all the wires and seem to have the correct voltages. We tried doing the bypass, but that did not render different results.

I did notice one item out of the ordinary, but I am not sure what normal is, the coil is extremely hot. Have we missed something simple?

Nuts
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Old 05-26-2018, 09:22 PM   #8
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Dang, sorry it was not the NSS!
I googled and found this,
Part 1 -How to Test the Ford Ignition Control Module (Distributor Mounted)

Good luck, and I don't think the coil is supposed to be hot to the touch!
Hopes this helps sort out your problem! Rail!
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Old 05-30-2018, 05:27 PM   #9
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The coil will heat up if the ignition is left on without the engine running. I can cause damage to the coil but usually isn't a problem unless left for extended periods.
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