Sync Loss Errors at 3500 at 3600 rpm
#1
Tour de Franzia
![](/mt2011/images_td/ranks/supporter1.gif)
Thread Starter
iTrader: (6)
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,085
Total Cats: 375
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Does this look like a crank sensor alignment issue or something else? I only get the issue at ~3500 rpm. The 99 crank sensor is a credit-card thickness from the tooth, maybe I need to pick up new feelers since the old ones were lost int he move. I'm guessing the swap between going high and low tells the story.
![](https://www.miataturbo.net/attachments/megasquirt-18/220098d1522102967-sync-loss-errors-3500-3600-rpm-sync-loss.jpg)
Thanks for the help.
![](https://www.miataturbo.net/attachments/megasquirt-18/220098d1522102967-sync-loss-errors-3500-3600-rpm-sync-loss.jpg)
Thanks for the help.
Last edited by hustler; 03-26-2018 at 09:00 PM.
#7
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Not to threadjack, but I've been having intermittent sync loss on my 2000 miata when the car is cold (below ~70c water temp). Does the car being cool indicate a specific issue?
It seems like it usually happens under light acceleration and I typically get somewhere between none and 5 counts until the car warms up. I keep messing with the crank sensor gap without any luck.
It seems like it usually happens under light acceleration and I typically get somewhere between none and 5 counts until the car warms up. I keep messing with the crank sensor gap without any luck.
#8
Tour de Franzia
![](/mt2011/images_td/ranks/supporter1.gif)
Thread Starter
iTrader: (6)
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,085
Total Cats: 375
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Yes. I remember previously that fouled plugs would whack-out the tach on a 1.6, but I believe I now have the tach driven from the CKP. Regardless, I'm changing plugs today, measuring gap on the CKP tomorrow and putting it at .030". I don't know what causes the logger to swap from high to low like that.
#13
SADFab Destructive Testing Engineer
![](/mt2011/images_td/ranks/supporter1.gif)
![](/mt2011/images_td/ranks/moderator.png)
iTrader: (5)
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 18,642
Total Cats: 1,866
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Yes pots. What kind of megasquirt is it? If it's an mslabs unit then nvm.
I've got a spare sensor or 2 I could loan you. Would just want it replaced if it fixes it.
I've got a spare sensor or 2 I could loan you. Would just want it replaced if it fixes it.
#15
Tour de Franzia
![](/mt2011/images_td/ranks/supporter1.gif)
Thread Starter
iTrader: (6)
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,085
Total Cats: 375
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Yep, ~2012 MSLabs MS3. Thanks for the offer but I think there is a spare sensor somewhere, in some box, from the move. I'm sure it's something super simple I overlooked. I can't remember most of what I need to from so long ago now that I'm a spandex clad bike saddle sniffer.
#18
Elite Member
![](/mt2011/images_td/ranks/supporter1.gif)
iTrader: (10)
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,987
Total Cats: 359
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Maybe @Matt Cramer or @Ben might have some insight on why the logger flipped like that.