Bad Ignition Coil?

Kinja'd!!! "Brickman" (legomaniacman)
03/07/2016 at 16:21 • Filed to: None

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Driving home last night and my van died :(

Everything was fine for the past 19 years, going 25mph and engine cut off and rolled to a stop. Tried to restart and nothing, like I was out of gas, but I had 1/4 of a tank.

Had my dad pull me home, luckily it died not to far from the house. Did my usual mechanic process of elimination. Fuel pump works, injectors are firing and 12v is going into the ignition coil, but not out. All fuses and relays are good. I get no spark, plug is cold even touched it while starting and nothing.

I have the factory service manual (gotta have that :D) and check resistance on the primary terminals. Supposed to be 0.45 - 0.65, but I keep getting random numbers. Every so often I get 1.8. Which is still out of spec. Secondary terminals (the 4 big posts) are within specs. Check it with another volt meter and same thing.

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Also read up that the crankshaft position sensor can cause the engine to shut off and not restart, but if it is, the fuel pump would not be turning on and injectors wouldn’t work. Checked inside the engine and spark plug and I can see a thin amount of gas on the spark plug and piston like it should.

Mostly seeking some second opinions. I say it has to be the ignition coil that went.


DISCUSSION (11)


Kinja'd!!! CalzoneGolem > Brickman
03/07/2016 at 16:26

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If it is the crankshaft position sensor you should get a code. Had one go in my PT and I’d just disconnect the battery for 10 minutes and it’d fire right up again.


Kinja'd!!! Urambo Tauro > Brickman
03/07/2016 at 16:32

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Try touching your multimeter’s leads together to make sure THEY don’t have any resistance first. Then go back to the coil and try to get a better connection. Don’t be afraid to scrape the terminals if you have to. It looks pretty clean in the pic, but you want a steady reading.

The coil is probably gonna test bad anyway, but I want you to be sure before wasting money.


Kinja'd!!! Brickman > CalzoneGolem
03/07/2016 at 16:46

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Nope, no codes or check engine light. Disconnected battery to view any wiring that would be bad then tried again and same.


Kinja'd!!! Brickman > Urambo Tauro
03/07/2016 at 16:47

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yep, made sure meter ohm’d out. Shouldn’t cost much, starting to research prices. I need new coil, spark plug wires, and might as well get new sparkplugs.


Kinja'd!!! Fed(oo=[][]=oo)uken > Brickman
03/07/2016 at 17:20

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Coincidentally I’m going through the exact same thing on my ‘87 535is! At least on the old BMWs, the crank position sensor is only for spark timing. Fuel and injectors will still operate. Might want to ohm out that sensor. And check that there isn’t also a speed sensor on the flywheel or something. But it could very well be the ignition coil! Coil, relay, crank pos. sensor! There’s a little post welded to the flywheel on my car that the reference sensor picks up, these have been known to rust off..

Good luck!


Kinja'd!!! luvMeSome142 & some Lincoln! > Brickman
03/07/2016 at 17:24

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That thing looks like some sort of Star Wars alien. Jar Jar?

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This guy?


Kinja'd!!! PorkchoPlissken > Brickman
03/07/2016 at 18:14

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At least you had porn while you waited. That’s what people keep in vans, right? Once I pulled up next to a van at a light, looked over, and witnessed all of the porn ever printed, taped to the ceiling of the van. That’s when I knew, that I needed a van.


Kinja'd!!! Brickman > luvMeSome142 & some Lincoln!
03/07/2016 at 18:39

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Damn it. Cannot unsee!! :P


Kinja'd!!! Brickman > PorkchoPlissken
03/07/2016 at 18:40

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Lol. This thing has more windows than a skyscraper.


Kinja'd!!! PorkchoPlissken > Brickman
03/07/2016 at 18:51

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I see curtains in your near future.


Kinja'd!!! CalzoneGolem > Brickman
03/08/2016 at 08:16

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The lack of codes makes me think it is not the coil but the fuck do I know.