BT disconnects during cold start cranking - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to   Members

MEGAsquirt A place to collectively sort out this megasquirt gizmo

LinkBack Thread Tools
Old 03-09-2016, 10:13 PM   #1
Senior Member
Thread Starter
iTrader: (1)
wackbards's Avatar
Join Date: Nov 2015
Location: Seattle
Posts: 607
Total Cats: 63
Default BT disconnects during cold start cranking

I built my MS with the BT adapter sold by EFI. I'm struggling with cold start gremlins cuz I'm a noob. I'm having a hell of a time getting a decent log of the first cold start because my BT connection keeps shitting out during cranking. My cold start is so bad that cranking is momentarily ceased. I'm wondering if this momentarily disrupts power to the BT antenna? The only way to reinstate the connection is to disable the connection in my laptop settings, re-find the BT device (which creates a new set of virtual ports), go into tunerstudio, & select the new virtual port.

I thought the BT was super clever, and I attached it directly to my MS, which is neatly tucked away under the carpet. I could pull it up & just resort to using the cable, but I'm curious if anyone else has resolved this issue.
wackbards is offline   Reply With Quote
Old 03-10-2016, 03:03 AM   #2
Junior Member
Join Date: Oct 2015
Location: Stockholm, Sweden
Posts: 70
Total Cats: 9

I would guess the BT adapter resets from the voltage drop when cranking. If the cranking is so weak that the engine occasionally stops turning, it is possible the voltage drop also affects the MS. Obvious suspects to that are bad battery or shitty wiring, followed by a bad starter.

Try measuring the voltage (the feed to the Megasquirt or somewhere nearby), it shouldn't drop much below 9V or so.
jstck is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Supertech vs Sealed Power VS855 Valve Springs Carloverx Engine Performance 38 08-21-2017 09:58 PM
Crank thrust bearing problem guttedmiata Engine Performance 26 04-29-2016 01:30 PM
Turbo built? frenchmiata Engine Performance 1 03-05-2016 08:52 PM
Brain Built MS3. 94-95 model specific dwink Miata parts for sale/trade 2 03-04-2016 07:56 PM
Time to figure out a new exhaust... Suggestions? viriiguy DIY Turbo Discussion 26 03-01-2016 02:42 PM

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -4. The time now is 08:27 AM.