What sensor is this on back of 2004 VVT head? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 09-05-2014, 08:19 AM   #1
Junior Member
Thread Starter
 
Join Date: May 2014
Location: Columbia, MD
Posts: 140
Total Cats: 8
Default What sensor is this on back of 2004 VVT head?

Sensor above coolant sensor?



Have not seen mention of this before.
Attached Thumbnails
What sensor is this on back of 2004 VVT head?-img_3773.jpg  
gjsmith66 is offline   Reply With Quote
Old 09-05-2014, 04:05 PM   #2
Supporting Vendor
iTrader: (10)
 
Reverant's Avatar
 
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,441
Total Cats: 198
Default

It's not a sensor, it's a condenser, aka a big capacitor.
Reverant is offline   Reply With Quote
Old 09-05-2014, 04:17 PM   #3
Junior Member
iTrader: (2)
 
Join Date: Sep 2013
Location: Pittsburgh PA
Posts: 276
Total Cats: 6
Default

Quote:
Originally Posted by Reverant View Post
It's not a sensor, it's a condenser, aka a big capacitor.
is it for the ignition system?
Davezorz is offline   Reply With Quote
Old 09-05-2014, 04:21 PM   #4
Elite Member
iTrader: (1)
 
Leafy's Avatar
 
Join Date: Jun 2012
Location: NH
Posts: 9,093
Total Cats: 90
Default

Never seen that or that bracket before.
Leafy is offline   Reply With Quote
Old 09-05-2014, 05:10 PM   #5
Junior Member
Thread Starter
 
Join Date: May 2014
Location: Columbia, MD
Posts: 140
Total Cats: 8
Default

Thanks Reverant, I saw mention of it as a condenser in another thread, however it looked as if it was located in a slightly different spot. My guess is that with using my COPS, I can delete that.
gjsmith66 is offline   Reply With Quote
Old 09-05-2014, 05:37 PM   #6
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Delicious and Moist.
Posts: 26,326
Total Cats: 1,924
Default

Quote:
Originally Posted by Davezorz View Post
is it for the ignition system?
Yes, it goes between the + and GND wires supplying the ignition coil primaries.

To the best of my knowledge, all Miatas have one. On the 1.6 cars, it's tucked up under the fender lip near the igniter module. Not sure where it is on the '94-'00 engines.




Quote:
Originally Posted by gjsmith66 View Post
My guess is that with using my COPS, I can delete that.
It's not a bad thing to have in place- its primary function is to smooth out the supply ripples caused by the coil primaries switching on and off. Commonly, a very large capacitor or capacitor bank (on the order of 10,000 uf or more) is installed as part of a COP conversion, but even so, there's no harm leaving the stock unit in place.
Joe Perez is offline   Reply With Quote
Old 09-05-2014, 05:40 PM   #7
Elite Member
iTrader: (1)
 
Leafy's Avatar
 
Join Date: Jun 2012
Location: NH
Posts: 9,093
Total Cats: 90
Default

Its certainly not in the coil harness for the 94 coils. And I'm not using it for the 01+ coils on my car now. I wonder if the lack of this capacitor could be causing some of my crank trigger noise.
Leafy is offline   Reply With Quote
Old 09-05-2014, 05:48 PM   #8
Junior Member
Thread Starter
 
Join Date: May 2014
Location: Columbia, MD
Posts: 140
Total Cats: 8
Default

Leafy, on my COP conversion, I put 4 of these (Nippon Chemi-Con 10000uf 25v 105C Axial Capacitor) between the + and - going to the COPs. Probably overkill, but did help with some lost sync 39's I was seeing on the MS3.

The other picture that I saw of this looked like it was mounted on top of the valve cover toward the right rear.
gjsmith66 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
Going back to stock. Need some 1.6 parts. Trent WTB 2 10-01-2015 01:15 PM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 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 05:50 PM.