Blown ignition fuse - Team Camaro Tech
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post #1 of 9 (permalink) Old Mar 25th, 13, 12:09 AM Thread Starter
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Blown ignition fuse

Background... All new Painless wiring throughout the car. Push button start system. I've been having issues with the car running like crap. Anyway I went to start the car and she was running even worse than before. I shut her down and walked away before I threw something at her! Here's my problem. When I shut it down, I accidentally left the ignition switch on. I was playing with the kid for a while and I walked back into the garage. Electrical fire smell! I freaked out started running around the car looking for smoke. There was none. I disconnected the trickle charger and noticed the ignition was still on. Turned it off. I made sure there was nothing burning and put the charger back on. The next day I went back out there to try and start her back up. Nothing. Took the test meter to the 12v wire on the hei dizzy and it was 0. Looked at the fuse block and couldn't find an ign. Fuse but found a coil fuse. It was blown. Replaced the fuse and went to start it again and it "popped" as soon as I cranked it over. Where to start? The 12v dizzy wire is where I'm thinking. There's got to be a fried wire some where. That burning smell was too strong.

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post #2 of 9 (permalink) Old Mar 25th, 13, 11:47 AM
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Re: Blown ignition fuse

Does the coil fuse pop only when you crank the car or even when only keyed to the run position without cranking?

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post #3 of 9 (permalink) Old Mar 25th, 13, 06:31 PM Thread Starter
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Re: Blown ignition fuse

cfry, it pops even when turned to the run position w/o cranking.
Suggestions on where to start? Thanks.

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post #4 of 9 (permalink) Old Mar 25th, 13, 06:37 PM
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Re: Blown ignition fuse

Quote:
Originally Posted by ROBS6T8 View Post
cfry, it pops even when turned to the run position w/o cranking.
Suggestions on where to start? Thanks.
Wire is fried and direct grounded.

Replace the wire completely

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post #5 of 9 (permalink) Old Mar 25th, 13, 11:42 PM
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Re: Blown ignition fuse

Unplug wire from dist and replace fuse. If it still blows start at distributor and trace back to ignition switch. I think John's advice is good but incomplete. The word wire should be wires. In my experience if one in the harness gets that hot is takes more with it when it goes.

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post #6 of 9 (permalink) Old Mar 26th, 13, 01:56 AM Thread Starter
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Re: Blown ignition fuse

Thank you John and Jeff. I will investigate the wires come Thursday or Friday. I'll come back with my findings.

68 Camaro SS... getting there!!
"If happiness is in your destiny, you need not be in a hurry."
If I can only convince myself of this!

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post #7 of 9 (permalink) Old Mar 27th, 13, 06:02 PM Thread Starter
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Re: Blown ignition fuse

While working out today, I decided to jump in the garage and investigate in between sets. I started with the wires. However, when I pulled the 12v wire from the cap I went ahead and smelled it. Burned smell. Coil? I deceided to pull the cover and while I was doing this I noticed some black around the #1 post. This is what I found...
It was a you know what getting this off!


Coil




Question for you before I take this back to O'Reilly's. Is this normal for leaving the ignition on for 20 to 30 minutes? I'm sure I've left it on before back in the day.
Thank you.

68 Camaro SS... getting there!!
"If happiness is in your destiny, you need not be in a hurry."
If I can only convince myself of this!

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post #8 of 9 (permalink) Old Mar 28th, 13, 11:13 AM
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Re: Blown ignition fuse

With all the cars I have ever worked on (thousands), I have never seen an ignition coil do that. Dead short inside the coil. Think resistance arc welder!!!! Not your fault at all. You should be able to leave the ignition on forever theoretically. the coil can get warm, but should never do that. I would go ahead and check all of the grounds after you get the new coil (and cap!!!!) installed on the HEI. Retrace all wires on the circuit also to verify that the heat did not travel up them and melt insulation. (points of least resistance burn fastest) After that you should be good.

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DSE Quadralink

"From what I have replaced in pursuit of more, I could have built another one."
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post #9 of 9 (permalink) Old Mar 28th, 13, 01:35 PM Thread Starter
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Re: Blown ignition fuse

I just spoke with MSD and they wanted me to send it back. I asked how long it was going to take to get one returned? He said, "Nevermind, with the cost of this one, I'll just send you one out". Great. I asked why this would happen? He told me it could have been a bad ground in the coil causing it to arc. Bad ground anywhere else on the vehicle. He said I must have my battery directly grounded to the engine. It's in the trunk! Never had this issue with my other one? Or I left the key on!! I told him I did. Obviusly he didn't catch that part of the story. But why leaving the key on would this happen? If it's running, isn't it getting 12v consistently? he told me to make sure it was getting no less than 11v and no more than 14v. It gets 12.8v while running!

68 Camaro SS... getting there!!
"If happiness is in your destiny, you need not be in a hurry."
If I can only convince myself of this!

My slooow build thread
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