[Miata] '02 Miata Bucking Without CEL - Big Mystery!

[Larry Alster]

Even though there is no CEL have you checked for stored codes??

 

 

 

Larry
 
White Knight      1991 Crystal White   #99 CSP
Silver Bullet        1992 Silverstone     #17 SM2  FM I+ Turbo
Honey B             1992 Sunburst Yellow #99 SM2L  JR Supercharger
Whooosh           2004 Titanium Mazdaspeed MX-5
 
LowCountry Miata   <http://www.lowcountrymiataclub.net>
http://www.lowcountrymiataclub.net
Masters Miata
RAGS 074

 

From: miatapower-bounces at miatapower.net
[mailto:miatapower-bounces at miatapower.net] On Behalf Of Bryan Wyatt
Sent: Monday, May 26, 2008 7:41 PM
To: Miata Power List; Miata Mailing List
Subject: '02 Miata Bucking Without CEL - Big Mystery!

 


All,

 

I'm not sure how to describe this in one word, but here goes the long
version:

I was on my way home driving across Ohio this weekend and 3 separate times
the car (an '02 with stock everything intake/exhaust/ignition and about 60k
on the clock) began to buck uncontrollably.  The revs would bounce within a
500rpm range of whatever value they were at when the car began to buck.  The
only way to "cure" the problem was to turn the car off and wait for it to
cool down.  Unforutnately, the car didn't always start on the first try.
Very frustrating!

 

As I said before, the car is stock everything (I even put on a stock exhaust
after I bought it).  I replaced the plugs about a month (and 1000mi) ago,
but the car did this same thing on the old plugs.  It will even repeat the
behavoir at random in the parking lot at work driving at no more than 25mph.

 

Any ideas?  Could heat soak be affecting the coils or wires?  Maybe even the
Cam Angle Sensor?  The car seems to start up after I let the engine cool.
Is there a way I could effectively cool off the engine bay?

 

To repeat one last time...the car does not throw a CEL even after the car is
restarted.

 

Thanks for your help!

 

-Bryan and The Tick

 

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