General Miata Chat A place to talk about anything Miata

HELP! car runs on 3 cyls when cold

Old 09-30-2014, 05:25 AM
  #1  
Junior Member
Thread Starter
 
4sfed5's Avatar
 
Join Date: Oct 2004
Posts: 206
Total Cats: 9
Default HELP! car runs on 3 cyls when cold

my NA6 turbo runs like a bucket of crap for about a minute when cold started. after that its "normal" but seems a bit rich.
it feels like its on 3 cyls and will barely idle and chugs like a **** for about a minute. no real smoke just that smell f unburnt fuel.

plugs and leads are new as is the ignition switch. havent done a compression test yet...

any ideas??
4sfed5 is offline  
Old 09-30-2014, 08:09 AM
  #2  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,488
Total Cats: 4,077
Default

what cylinder doesn't run and what's not working the spark or the fuel?
Braineack is offline  
Old 09-30-2014, 08:53 AM
  #3  
Cpt. Slow
iTrader: (25)
 
curly's Avatar
 
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 14,175
Total Cats: 1,129
Default

I like your compression check idea. A low cylinder can hide itself on a warm engine, but it's much more obvious when cold.
curly is offline  
Old 10-10-2014, 06:27 AM
  #4  
Newb
 
barbiemx5's Avatar
 
Join Date: Sep 2014
Posts: 19
Total Cats: -8
Default

ha! and i thought i was the only one this happened to
barbiemx5 is offline  
Old 10-10-2014, 06:43 AM
  #5  
Elite Member
 
Zaphod's Avatar
 
Join Date: Mar 2006
Location: Schwarzenberg, Germany
Posts: 1,553
Total Cats: 101
Default

Could also be some problem with the Coilpack if OEM...
Zaphod is offline  
Old 10-10-2014, 12:56 PM
  #6  
Elite Member
 
codrus's Avatar
 
Join Date: Mar 2007
Location: Santa Clara, CA
Posts: 5,165
Total Cats: 855
Default

Originally Posted by Zaphod
Could also be some problem with the Coilpack if OEM...
Coil pack problems usually result in running on 2 cylinders, due to the waste spark config.

--Ian
codrus is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
gsyk59
Engine Performance
49
11-22-2015 04:11 AM
E=MC^2
DIY Turbo Discussion
29
10-20-2015 12:03 AM
Colipto
General Miata Chat
3
09-11-2015 01:44 PM
SuperSneakySecretSquirrel
Meet and Greet
5
09-06-2015 08:30 PM
Backwoodsballer
General Miata Chat
0
09-04-2015 06:39 AM


Thread Tools
Search this Thread
Quick Reply: HELP! car runs on 3 cyls when cold



All times are GMT -4. The time now is 11:02 PM.