96 Miata Hesitation below 4000 rpm - 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 07-05-2012, 06:42 PM   #1
Newb
Thread Starter
 
Join Date: Nov 2011
Posts: 17
Total Cats: -9
Default 96 Miata Hesitation below 4000 rpm

I have a 96 miata and it has a pretty bad hesitation below 4000 rpm but above 4000 its great. Any ideas what it might be?
500horse is offline   Reply With Quote
Old 07-05-2012, 07:14 PM   #2
Moderator
iTrader: (11)
 
sixshooter's Avatar
 
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 15,669
Total Cats: 1,561
Default

Completely stock?
sixshooter is offline   Reply With Quote
Old 07-06-2012, 11:56 AM   #3
Newb
Thread Starter
 
Join Date: Nov 2011
Posts: 17
Total Cats: -9
Default

the motor is completely stock
500horse is offline   Reply With Quote
Old 07-06-2012, 01:57 PM   #4
Senior Member
iTrader: (4)
 
Join Date: Jan 2008
Location: Falls Church, VA
Posts: 1,367
Total Cats: 16
Default

Plugs, plug wires, maybe a coil going bad? Not sure what the symptoms of a failing CAS are but if it runs fine above 4000 rpm I would guess it's more related to spark than fuel.
ScottFW is offline   Reply With Quote
Old 07-06-2012, 01:59 PM   #5
Elite Member
iTrader: (41)
 
Join Date: Jan 2006
Location: Seabrook, TX
Posts: 2,409
Total Cats: 19
Default

Check your base timing with a timing light to see if it is retarded. It will act just like this if it has moved a little and made it at 6 or 8* static.
rharris19 is offline   Reply With Quote
Old 07-06-2012, 02:48 PM   #6
Newb
Thread Starter
 
Join Date: Nov 2011
Posts: 17
Total Cats: -9
Default

ok is there anyother way to tell about timing?
500horse is offline   Reply With Quote
Old 07-06-2012, 02:49 PM   #7
Newb
Thread Starter
 
Join Date: Nov 2011
Posts: 17
Total Cats: -9
Default

only reason i ask is i dont have a timing lite to check
500horse is offline   Reply With Quote
Old 07-06-2012, 02:50 PM   #8
Newb
Thread Starter
 
Join Date: Nov 2011
Posts: 17
Total Cats: -9
Default

i will change plugs and wires. how easy is it to change a coil
500horse is offline   Reply With Quote
Old 07-06-2012, 02:58 PM   #9
Senior Member
iTrader: (4)
 
Join Date: Jan 2008
Location: Falls Church, VA
Posts: 1,367
Total Cats: 16
Default

Call your local auto parts stores and ask if they have a timing light you can borrow, then limp your car over there and check it. Mine drove about like that when my timing belt skipped a tooth and was running retarded timing, so that could definitely be the problem. It doesn't cost anything to check & adjust so I'd do that before buying any parts.
ScottFW is offline   Reply With Quote
Old 07-06-2012, 03:59 PM   #10
Newb
Thread Starter
 
Join Date: Nov 2011
Posts: 17
Total Cats: -9
Default

cool will do that. would that make my check engine light come on?
500horse is offline   Reply With Quote
Old 07-06-2012, 04:19 PM   #11
Elite Member
iTrader: (17)
 
Join Date: Aug 2007
Location: Fort Myers, FL
Posts: 2,791
Total Cats: 130
Default

No it wouldn't typically give a check engine light.
pdexta is offline   Reply With Quote
Old 07-06-2012, 04:33 PM   #12
Newb
Thread Starter
 
Join Date: Nov 2011
Posts: 17
Total Cats: -9
Default

ok will have them check the check engine light to
500horse is offline   Reply With Quote
Old 07-06-2012, 04:37 PM   #13
Elite Member
iTrader: (3)
 
Join Date: Mar 2008
Location: Granbury, TX
Posts: 6,009
Total Cats: 583
Default

I've experienced this when a timing belt was installed one tooth off. How long since you've changed your timing belt?
hornetball is offline   Reply With Quote
Old 07-06-2012, 05:36 PM   #14
Senior Member
iTrader: (4)
 
Join Date: Jan 2008
Location: Falls Church, VA
Posts: 1,367
Total Cats: 16
Default

Quote:
Originally Posted by 500horse View Post
ok will have them check the check engine light to
So you have a CEL on too? If you have a 96 then you're OBD II and should own a code reader (and a timing gun). They are inexpensive tools and quite handy. But yeah, the auto parts store can probably pull codes for you too.

If you can't get it to time properly no matter how much you rotate the CAS, then your timing belt isn't on correctly. I guess it might throw a CEL for a misfire or something seemingly related to the O2 sensor if the timing was fux0red, but maybe not. I have a 94 so I dunno how your newfangled diagnostic systems behave.
ScottFW is offline   Reply With Quote
Old 07-07-2012, 08:15 PM   #15
Newb
Thread Starter
 
Join Date: Nov 2011
Posts: 17
Total Cats: -9
Default

lol cool will check it out thanks!
500horse is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
15x10 - 15x11 6UL @ 949 Racing emilio700 Wheels and Tires 151 06-02-2017 03:36 PM
3rd Time's a Charm...hopefully. zephyrusaurai Meet and Greet 2 09-28-2015 11:59 PM
VR6 to Miata Swap ScrapinMX5 Meet and Greet 8 09-28-2015 02:04 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 08:27 AM.