Megasquirt PNP Pro repair
#1
Junior Member
Thread Starter
iTrader: (2)
Join Date: Dec 2014
Location: Salinas, CA
Posts: 307
Total Cats: 23
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Does anyone know who repairs megasquirts? I have a MSPNP Pro for my 1990 Miata controlling a turbo vvt engine. I was driving around doing some autotune. Everything was fine for quite a while, then as I was almost getting home, I made a right turn and my head lights turned off then back on, then all of a sudden the car stumbled and turned off. Smoke started to come from the Megasquirt. I turned off the key and noticed that my headlights would not work anymore as well as my emergency lights, although the cluster still blinked the indicators very quickly like when there is a short on the headlights. Anyways the main problem after examining the ECU is that I burnt some things on there and some traces (I think that's what they're called) got damaged also. I hadn't connected the tach out cable coming out the ecu to anything and the wiring was exposed. Since the ECU wasn't bolted down yet I wonder if this cable could have touch the chassis and shorted it out? I'm kind of bummed out since I had just recently finished my vvt swap and was getting some tuning done. ![Tear](https://www.miataturbo.net/images/smilies/tear.gif)
![Name: 20160921_004121.jpg
Views: 500
Size: 149.7 KB](https://www.miataturbo.net/attachments/megasquirt-18/183134d1501204777-megasquirt-pnp-pro-repair-20160921_004121.jpg)
![](http://i990.photobucket.com/albums/af24/konmo831/20160921_004141.jpg)
![](http://i990.photobucket.com/albums/af24/konmo831/20160921_004218.jpg)
![](http://i990.photobucket.com/albums/af24/konmo831/20160921_004226.jpg)
![](http://i990.photobucket.com/albums/af24/konmo831/20160921_004302.jpg)
![](http://i990.photobucket.com/albums/af24/konmo831/20160921_004317.jpg)
![Name: 20160921_004326.jpg
Views: 469
Size: 185.6 KB](https://www.miataturbo.net/attachments/megasquirt-18/183135d1501204777-megasquirt-pnp-pro-repair-20160921_004326.jpg)
![Tear](https://www.miataturbo.net/images/smilies/tear.gif)
![Name: 20160921_004121.jpg
Views: 500
Size: 149.7 KB](https://www.miataturbo.net/attachments/megasquirt-18/183134d1501204777-megasquirt-pnp-pro-repair-20160921_004121.jpg)
![](http://i990.photobucket.com/albums/af24/konmo831/20160921_004141.jpg)
![](http://i990.photobucket.com/albums/af24/konmo831/20160921_004218.jpg)
![](http://i990.photobucket.com/albums/af24/konmo831/20160921_004226.jpg)
![](http://i990.photobucket.com/albums/af24/konmo831/20160921_004302.jpg)
![](http://i990.photobucket.com/albums/af24/konmo831/20160921_004317.jpg)
![Name: 20160921_004326.jpg
Views: 469
Size: 185.6 KB](https://www.miataturbo.net/attachments/megasquirt-18/183135d1501204777-megasquirt-pnp-pro-repair-20160921_004326.jpg)
#2
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
The only person I have heard of that will repair these things is PFTuning which is Peter Florence. He's in one of the Carolina's. But I hear he is incredibly difficult to get in touch with. You might try the facebook page.
Obviously DIYAutotune but I believe they don't repair as much as replace, if you know what I mean. Call them, they charge an hourly rate plus parts. Who knows, might be under warranty.
And one of the site big wigs (jsmcortina) at MSForums says he repairs in his sig. Might be worth a shot although he is across the pond. Welcome - James Murray Engineering
Whatever the case I highly doubt the tach out touching ground or otherwise would be the culprit to your ecu failure. And I would definitely rule it out of causing the headlights to turn off and whatnot. I really do feel for you so check your wiring before putting another $1000 ecu back in the car.
Obviously DIYAutotune but I believe they don't repair as much as replace, if you know what I mean. Call them, they charge an hourly rate plus parts. Who knows, might be under warranty.
And one of the site big wigs (jsmcortina) at MSForums says he repairs in his sig. Might be worth a shot although he is across the pond. Welcome - James Murray Engineering
Whatever the case I highly doubt the tach out touching ground or otherwise would be the culprit to your ecu failure. And I would definitely rule it out of causing the headlights to turn off and whatnot. I really do feel for you so check your wiring before putting another $1000 ecu back in the car.
#6
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Yes, this thing looks like it's been hit with 18 volts... and the voltage has been kept that high for a long time.
We can repair the damage in the pictures - it's a two layer board, so there's little risk of damaging other traces than the cooked ones. Email us at support@diyautotune.com.
We can repair the damage in the pictures - it's a two layer board, so there's little risk of damaging other traces than the cooked ones. Email us at support@diyautotune.com.
#7
Junior Member
Thread Starter
iTrader: (2)
Join Date: Dec 2014
Location: Salinas, CA
Posts: 307
Total Cats: 23
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Yes, this thing looks like it's been hit with 18 volts... and the voltage has been kept that high for a long time.
We can repair the damage in the pictures - it's a two layer board, so there's little risk of damaging other traces than the cooked ones. Email us at support@diyautotune.com.
We can repair the damage in the pictures - it's a two layer board, so there's little risk of damaging other traces than the cooked ones. Email us at support@diyautotune.com.
#8
Junior Member
Thread Starter
iTrader: (2)
Join Date: Dec 2014
Location: Salinas, CA
Posts: 307
Total Cats: 23
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
-David
#10
Junior Member
Thread Starter
iTrader: (2)
Join Date: Dec 2014
Location: Salinas, CA
Posts: 307
Total Cats: 23
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Yes I was using the VVT engine alternator, but I thought that was okay to use since the MSPNP Pro can control it. At least that is what I'm pretty sure I had read. I didn't change any of the alternator control settings in tunerstudio though, left whatever was on the base map for 01-05.
Last edited by konmo; 09-21-2016 at 12:45 PM. Reason: typo
#11
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Yes I was using the VVT engine alternator, but I thought that was okay to use since the MSPNP Pro can control it. At least that is what I'm pretty sure I had read. I didn't change any of the alternator control settings in tunerstudio though, left whatever was on the base map for 01-05.
#12
mkturbo.com
![](/mt2011/images_td/ranks/supporter1.gif)
![](/mt2011/images_td/ranks/admin.png)
iTrader: (24)
Join Date: May 2006
Location: Charleston SC
Posts: 15,189
Total Cats: 1,685
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I think AFM is onto something. If you did not rewire the alternator when you swapped on the VVT one the MSPro will not properly control it. I would go the easy route that he suggested and find a 94-97 alternator and swap that over. I am assuming OP is already using the ribbed water pump pulley since it was probably on the vvt motor he got.
#13
Junior Member
Thread Starter
iTrader: (2)
Join Date: Dec 2014
Location: Salinas, CA
Posts: 307
Total Cats: 23
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
#16
Junior Member
Thread Starter
iTrader: (2)
Join Date: Dec 2014
Location: Salinas, CA
Posts: 307
Total Cats: 23
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I think AFM is onto something. If you did not rewire the alternator when you swapped on the VVT one the MSPro will not properly control it. I would go the easy route that he suggested and find a 94-97 alternator and swap that over. I am assuming OP is already using the ribbed water pump pulley since it was probably on the vvt motor he got.
#19
Junior Member
Thread Starter
iTrader: (2)
Join Date: Dec 2014
Location: Salinas, CA
Posts: 307
Total Cats: 23
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
well it definitely sucks finding out after the damage has happened. Would that cause the MS to burn up like that? I guess it's probably not good if it was overcharging it. Because it was idling and then driving fine for about an hour before this shenanigans. Would this cause battery drain?
#20
Junior Member
Thread Starter
iTrader: (2)
Join Date: Dec 2014
Location: Salinas, CA
Posts: 307
Total Cats: 23
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Much like with sequential injection, you can't use any features of the ECU that the harness doesn't support without extra wires. Unlike with sequential fuel, running wires to control an NB alternator with an ECU is a bad idea. Use the NA8 one if you have it.
That does really suck.
That does really suck.