Microsquirt v2.2 cooked. - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members

MEGAsquirt A place to collectively sort out this megasquirt gizmo

LinkBack Thread Tools
Old 07-31-2013, 03:13 PM   #1
Thread Starter
Join Date: May 2007
Location: ABQ, NM
Posts: 32
Total Cats: -1
Default Microsquirt v2.2 cooked.

2000 miata LS 60k miles with IAT mod and NGK powerdex and a 94 alternator.
thats it for mods.

after about 3 days of the car running great on megasquirt, merging on to the highway i started to experience power loss, so i pulled off and the car started just billowing white smoke.

of course i thought, oh no my head gasket. but given the mileage, the fact i'm not losing coolant, my coolant isnt bubbling, and my compression is good i certainly ruled that out.

next i tested for spark. i am getting no spark in 4, but i am getting it in 1. its intermittent so i replaced coil pack, plugs, wires, nothing. with the output test mode i could get coil b and d to click, but not spark and that was it.

so i pulled out my brain and this is what i found smelled before even opening it.

any ideas?

Attached Thumbnails
Microsquirt v2.2 cooked.-imag0365.jpg  
NotUrSistersMx5 is offline   Reply With Quote
Old 07-31-2013, 03:28 PM   #2
Boost Czar
iTrader: (61)
Braineack's Avatar
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,899
Total Cats: 1,792

that's a fuel driver.
Braineack is offline   Reply With Quote
Old 08-01-2013, 04:39 AM   #3
Elite Member
iTrader: (1)
Join Date: Jun 2006
Location: Warrington/Birmingham
Posts: 2,658
Total Cats: 39

Originally Posted by Braineack View Post
that's a fuel driver.
Agreed, somehow you've blown an injector driver on the uS card.
richyvrlimited is offline   Reply With Quote
Old 08-01-2013, 05:44 AM   #4
Supporting Vendor
iTrader: (10)
Reverant's Avatar
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,441
Total Cats: 198

Usually this happens if your injector's coil is damaged (zero resistance on the coil) or if you have low impedance injectors or if there's a short on the injector low side to 12V.
Reverant is offline   Reply With Quote
Old 08-07-2013, 12:24 PM   #5
Thread Starter
Join Date: May 2007
Location: ABQ, NM
Posts: 32
Total Cats: -1

thanks for the heads up. it is still under warranty so the microsquirt board is due to be replaced. hopefully i wont have the issue again, guess i'll go ahead and install those 650cc's that are sitting here waiting for my TD04. i'll keep you all updated
NotUrSistersMx5 is offline   Reply With Quote
Old 08-28-2013, 03:07 PM   #6
Thread Starter
Join Date: May 2007
Location: ABQ, NM
Posts: 32
Total Cats: -1

well, here is what has been concluded:

nothing really.

alright well.... idk, tunelife is a trial and error sort of thing.

DIYautotune was curious about my alternator setup, thinking the short could have come from that setup. the car was running for about a week fine before it blew that drive transistor.

i used a 94-95 alternator that self regulates voltage. it was charging fine, we had the dash light working properly as well.

DIY assumed it as a defective resistor and warrantied out the board. it will be here next week or so.

i plan to install my 650cc injectors even though i am not turbo yet.
Custom Fiveo 026IMP650X are the injectors i got off of Custom OEM Fuel Injectors from FiveOMotorsport

idk. here we go. i'm just praying i dont have the same issue again and its something wrong with my car causing this. i pray pray pray that it was indeed a defective drive transistor.
NotUrSistersMx5 is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
How to make and install your own Diy MegaSquirt Braineack Useful Saved Posts 113 04-14-2012 01:23 AM
TunerStudio First Time Setup Ben MEGAsquirt 12 09-20-2011 02:02 PM
Parallel install--no tach signal Ben MEGAsquirt 17 10-31-2009 06:16 PM
Megasquirt V2.2 Help drbogg MEGAsquirt 2 03-30-2009 09:40 AM
FS: Fully PnP Megasquirt N Spark Extra V2.2 ECU for 96-97 iWeasel410 Miata parts for sale/trade 16 04-15-2007 06:03 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 06:14 AM.