Flakey LC-1 (I know, how original) - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


ECUs and Tuning Discuss Engine Management, Tuning, & Programming

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 04-21-2015, 09:00 PM   #1
Senior Member
Thread Starter
iTrader: (1)
 
Join Date: Dec 2008
Location: Manassas, Virginia
Posts: 1,247
Total Cats: 57
Default Flakey LC-1 (I know, how original)

Trying to get this damn thing actually working for once (it never has). Got everything wired up right as far as I can tell. I did find that I somehow didn't ground it right and when I put a voltmeter on it I wasn't getting 12V across the ground (white) and power (red) wires. I fixed that problem and its definitely getting 12 now.

I've got three symptoms to diagnose the problem:

It won't heat up the sensor (sensor is out of the box new).

The brown output wire reads ~350mV when the key is on regardless of if the sensor is plugged in and 0V when key is off.

I can't get a reading out of the "OUT" headphone jack connection to connect to LogWorks.

Any ideas?
mx5autoxer is offline   Reply With Quote
Old 04-24-2015, 01:12 AM   #2
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,370
Total Cats: 1,332
Default

Replace it with an LC-2, MTX-L, AEM UEGO, Zeitronix, or literally any other wideband on the market? I'm only half-joking. LC-1s are junk and if yours has never worked right, there's probably nothing you can do to make your particular unit work correctly.
Savington is offline   Reply With Quote
Old 04-24-2015, 10:10 AM   #3
Supporting Vendor
 
Matt Cramer's Avatar
 
Join Date: Sep 2006
Posts: 2,266
Total Cats: 51
Default

The biggest cause of issues with LC-1s that I've seen has been poor quality grounds; they really need to be grounded to the engine or battery to work well. But this one sounds like it's dead now rather than merely flakey.
Matt Cramer is offline   Reply With Quote
Old 04-24-2015, 10:40 PM   #4
Senior Member
Thread Starter
iTrader: (1)
 
Join Date: Dec 2008
Location: Manassas, Virginia
Posts: 1,247
Total Cats: 57
Default

Yeah I'm only half-assed trying to fix it. Buying a new controller is probably smartest, but I figured I'd give it a last shot since chucking it would be throwing money down the drain. The direct line to the engine was the ground that wouldn't pull enough current so I'm saying eff it.
mx5autoxer is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1994 Spec Miata Race Car SM/SM2/SSM For Sale Quinn Cars for sale/trade 6 10-23-2016 08:58 AM
Low oil pressure after 1.8 swap and new turbo setup JesseTheNoob DIY Turbo Discussion 15 09-30-2015 03:44 PM
Odd Steering issue interestedofold Suspension, Brakes, Drivetrain 5 09-29-2015 02:42 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 10:46 PM.