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Burning up coils help

 
Old 09-22-2016, 04:46 PM
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Default Burning up coils help

I don't want to sound helpless or like a noob but here's my issue. I have burned up 2 coil packs trying to get my car to start. I figured the best the to do was to go with a COP setup so I did. I just got that installed but after running for 1 second my car died. immediately I went to the engine bay and smelled that electronic burning smell and saw my brand new COP driver smoking. After reading other people's posts I think its my ms2. But since I have a ms labs ms2 enhanced ecu I'm not sure what to check. I have a multimeter and the board out. Can anyone help me out?

(Edit: I'm getting a constant 12v power and two 5v signal from the wire harness when the car is not running is this normal?)

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Old 09-22-2016, 05:15 PM
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Which coils? How did you connect them? Wasted spark or sequential? What did you configure in the software?
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Originally Posted by ninerwfo View Post
The “into to megasquirt thread” mentions that the MS3 basic has 5 inputs with built in pull up resistors - and I was just wondering why it would have so many, while the MS3Pro PnP has just 2 (with no pull ups?)
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Old 09-22-2016, 05:30 PM
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The COPs I'm running are the Fab9 plug and play kit so they plug directly into the stock harness. I believe they are meant for wasted spark. These are my settings below. I apologize for any dumb mistakes I am new to megasquirt. Even though I have gone through a lot of the settings and I know what most of them do, I haven't actually touched anything physically. Thanks for your patience I really want to get my car running.



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Old 09-22-2016, 05:35 PM
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Was the ECU running on the car with the stock ignition?
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Originally Posted by ninerwfo View Post
The “into to megasquirt thread” mentions that the MS3 basic has 5 inputs with built in pull up resistors - and I was just wondering why it would have so many, while the MS3Pro PnP has just 2 (with no pull ups?)
MS Labs: Plug and Play Megasquirt ECUs for ANY 90-05 Miata (NA, NB1, NB2 w/VVT, MSM), including basemaps to get you started ASAP. PM me or email or details.
For support on MS Labs ECUs: Please email, be sure to include the unit's serial number and include a datalog and your current map.
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Old 09-22-2016, 05:38 PM
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Also overdwell and underdwell protection should be enabled.

You should not have 5V at signal wires with the engine not running.
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Originally Posted by ninerwfo View Post
The “into to megasquirt thread” mentions that the MS3 basic has 5 inputs with built in pull up resistors - and I was just wondering why it would have so many, while the MS3Pro PnP has just 2 (with no pull ups?)
MS Labs: Plug and Play Megasquirt ECUs for ANY 90-05 Miata (NA, NB1, NB2 w/VVT, MSM), including basemaps to get you started ASAP. PM me or email or details.
For support on MS Labs ECUs: Please email, be sure to include the unit's serial number and include a datalog and your current map.
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Old 09-22-2016, 05:45 PM
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I will definitely turn the protections on. The car was running on stock ignition until the stock coil pack went out after about half a minute. Also, i figured the signal wires should only be giving 5v when the coils are supposed to fire. But since I have a constant 5v is there something seriously wrong?
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Old 09-23-2016, 01:48 AM
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See if turning the protections on stops the 5V issue.
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Originally Posted by ninerwfo View Post
The “into to megasquirt thread” mentions that the MS3 basic has 5 inputs with built in pull up resistors - and I was just wondering why it would have so many, while the MS3Pro PnP has just 2 (with no pull ups?)
MS Labs: Plug and Play Megasquirt ECUs for ANY 90-05 Miata (NA, NB1, NB2 w/VVT, MSM), including basemaps to get you started ASAP. PM me or email or details.
For support on MS Labs ECUs: Please email, be sure to include the unit's serial number and include a datalog and your current map.
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Old 09-23-2016, 10:01 AM
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I turned on dwell protection (over and under) without the coils plugged in and measured 0v at the signal wires. After seeing this I plugged back in my coils and tried to crank over. Not even a studder, it seemed like there was zero spark. I unplugged the coils then tried to measure the signal wire for 5v while a helper cranked the car over, but I never saw any voltage.

As a side note to further confirm I am getting 0v from the signal wires, before without dwell protection on the coil driver got extremely hot. Now with dwell protection on, the driver doesn't heat up at all.
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Old 09-23-2016, 01:31 PM
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If you saw the COP driver smoking, then it's probably gone.

Don't expect to be able to measure 5V while cranking - the signal is at 5V for only ~5ms every 120ms or so. A digital multimeter won't catch it.
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Originally Posted by ninerwfo View Post
The “into to megasquirt thread” mentions that the MS3 basic has 5 inputs with built in pull up resistors - and I was just wondering why it would have so many, while the MS3Pro PnP has just 2 (with no pull ups?)
MS Labs: Plug and Play Megasquirt ECUs for ANY 90-05 Miata (NA, NB1, NB2 w/VVT, MSM), including basemaps to get you started ASAP. PM me or email or details.
For support on MS Labs ECUs: Please email, be sure to include the unit's serial number and include a datalog and your current map.
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Old 09-23-2016, 01:49 PM
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Thanks for the information rev. I figured trying to measure the 5v signal was a little silly since is such a short duration. What scares me is replacing the driver only to fry it again. Do you think my only problem is having dwell protection set to off? In the meantime it sounds like I need to go about replacing my driver
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Old 09-23-2016, 02:14 PM
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Yes, these should not be set off in your ECU version. If you don't have a permanent 5V on the signal wires, then you won't have a problem.
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Originally Posted by ninerwfo View Post
The “into to megasquirt thread” mentions that the MS3 basic has 5 inputs with built in pull up resistors - and I was just wondering why it would have so many, while the MS3Pro PnP has just 2 (with no pull ups?)
MS Labs: Plug and Play Megasquirt ECUs for ANY 90-05 Miata (NA, NB1, NB2 w/VVT, MSM), including basemaps to get you started ASAP. PM me or email or details.
For support on MS Labs ECUs: Please email, be sure to include the unit's serial number and include a datalog and your current map.
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Old 09-23-2016, 02:16 PM
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Thanks rev, you're the best!
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Old 09-24-2016, 08:26 PM
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Safe to assume the same protections should be configured for a BPT with Coil on Plugs using a MicroSquirt instead of a MegaSquirt? Would I need to set specific dwell settings for particular coil on plugs?
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Old 09-25-2016, 01:09 AM
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These instructions apply to specific revisions of the Enhanced MS2S, I don't know if they are needed on other ECUs.
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Originally Posted by ninerwfo View Post
The “into to megasquirt thread” mentions that the MS3 basic has 5 inputs with built in pull up resistors - and I was just wondering why it would have so many, while the MS3Pro PnP has just 2 (with no pull ups?)
MS Labs: Plug and Play Megasquirt ECUs for ANY 90-05 Miata (NA, NB1, NB2 w/VVT, MSM), including basemaps to get you started ASAP. PM me or email or details.
For support on MS Labs ECUs: Please email, be sure to include the unit's serial number and include a datalog and your current map.
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Old 09-25-2016, 07:35 PM
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Since it might be different for microsquirt, is there anyone who has installed a microsquirt with coil on plugs into a 1.8 bpt or something pretty close? I want to get rid of all the old electrical that I can from my setup to run fresh ignition. I will continue to search the forums.

Thanks
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