Compression test help! (can't reach cas plug) - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Engine Performance This section is for discussion on all engine building related questions.
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 01-11-2014, 03:18 PM   #1
Senior Member
Thread Starter
iTrader: (5)
 
Join Date: Nov 2013
Location: Wisconsin
Posts: 659
Total Cats: 66
Default Compression test help! (can't reach cas plug)

Trying to run a compression test, I have the plugs all out and the fuel relay pulled, trying to unplug the cas and I can't get my fat meatmallet hands back there.

It's a 99 miata, and it looks like there's two plugs on the cas. Do I need to unplug both? Can Iunplug them elsewhere? Is there a different fuse/relay iI can pull instead?
mlev is offline   Reply With Quote
Old 01-11-2014, 03:24 PM   #2
Junior Member
iTrader: (6)
 
Join Date: Dec 2008
Location: Boulder, CO
Posts: 291
Total Cats: 7
Default

The cas is on the front of the valve cover. I am guessing you meant to say coils?

--Ferdi
ftjandra is offline   Reply With Quote
Old 01-11-2014, 03:27 PM   #3
Senior Member
Thread Starter
iTrader: (5)
 
Join Date: Nov 2013
Location: Wisconsin
Posts: 659
Total Cats: 66
Default

The cas is on the front in an nb? I want to stop power from going to the coils, yes, but I've heard disconnecting the cas will stop power from going to the coils.

I've replaced the cas ring on an NA, but didn't know it was on the front in an nb.
mlev is offline   Reply With Quote
Old 01-11-2014, 03:36 PM   #4
Junior Member
iTrader: (6)
 
Join Date: Dec 2008
Location: Boulder, CO
Posts: 291
Total Cats: 7
Default

Front of the valve cover, pointing at the intake cam gear (cam gear has magnets).

There is a block-off plate at the rear of the exhaust cam where the NA cas was.

--Ferdi
ftjandra is offline   Reply With Quote
Old 01-11-2014, 03:50 PM   #5
Senior Member
Thread Starter
iTrader: (5)
 
Join Date: Nov 2013
Location: Wisconsin
Posts: 659
Total Cats: 66
Default

Sorry, is this what you're talking about? Can anyone confirm disconnecting the cas will stop power to the coils? I'd really rather not fry my coil pack..

http://chattypics.com/files/IMG_2014...fuwe9jq83i.jpg
mlev is offline   Reply With Quote
Old 01-11-2014, 03:54 PM   #6
Junior Member
iTrader: (6)
 
Join Date: Dec 2008
Location: Boulder, CO
Posts: 291
Total Cats: 7
Default

Yes, that's the cas. I am not sure whether unplugging it stops the coils from firing. My guess is that it should since the ecu wouldn't know when to fire them.

--Ferdi
ftjandra is offline   Reply With Quote
Old 01-11-2014, 04:12 PM   #7
Senior Member
Thread Starter
iTrader: (5)
 
Join Date: Nov 2013
Location: Wisconsin
Posts: 659
Total Cats: 66
Default

awesome, thanks so much. It's interesting that they moved the cas to the front on the NB. I was confused because I know it changed sides from the 1.6 to 1.8 NA miata, and thought the coil pack was the CAS.

Thank you for all your help. Props to you!
mlev is offline   Reply With Quote
Old 01-11-2014, 05:32 PM   #8
Senior Member
Thread Starter
iTrader: (5)
 
Join Date: Nov 2013
Location: Wisconsin
Posts: 659
Total Cats: 66
Default

Well, either I'm super lucky, or unplugging the cas worked.

In other news, it was exactly 152 on every cylinder, dry.
mlev is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 57 07-19-2017 05:11 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
01-05 Fab9 PNP COPs (used) FrankB Miata parts for sale/trade 6 09-30-2015 12:48 PM
3rd Time's a Charm...hopefully. zephyrusaurai Meet and Greet 2 09-28-2015 11:59 PM
BP-6D on CAS only aidandj MEGAsquirt 14 09-25-2015 06:26 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 07:01 PM.