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

[Bryan Wyatt]

It does come on at startup, but goes away as soon as the car fires (or at least whenever it normally does when nothing's wrong).

I'm out of warranty...sounds expensive (I realize what they're suggesting is replacement of the ECU).

-Bryan

--- On Tue, 5/27/08, Matt Yates <m at y8s.com> wrote:
From: Matt Yates <m at y8s.com>
Subject: RE: '02 Miata Bucking Without CEL - Big Mystery!
To: bryanewyatt at yahoo.com
Cc: "'Miata Power List'" <miatapower at miatapower.net>, "'Miata Mailing List'" <miata at realbig.com>
Date: Tuesday, May 27, 2008, 11:09 AM

I know you say no MIL but...
http://www.finishlineperformance.com/pdf/miata/bulletin/01-025-06-1648.pdf

and you did verify that the MIL comes on at startup right?

> I was thinking the same.  Knowing my luck, I could take it to the
> shop and probably have nothing happen...or it could happen on my way
> home. 
>
> You know?  I went through crap like this with the old car (spent
> several months and a couple grand--probably--chasing down P0300's that
> never entirely went away).  I'm beginning to suspect that I
just
> might be cursed...
>  
> -Bryan
>
> --- On Tue, 5/27/08, Larry Alster <Larry at Miata.net> wrote:
>
> From: Larry Alster <Larry at Miata.net>
> Subject: RE: '02 Miata Bucking Without CEL - Big Mystery!
> To: bryanewyatt at yahoo.com, "'Miata Power List'"
> <miatapower at miatapower.net>, "'Miata Mailing
List'"
> <miata at realbig.com>
> Date: Tuesday, May 27, 2008, 6:13 AM
>
>
>
>
>
>
>
>
> I think I might discount the condensation thinking since you said this has
> happened before over 1000 miles ago.  Seems unlikely to me that
the
> water laid around happily in the tank for over 1000 miles before acting up
> again.  Something that intermittent sounds more electrical to me.
>  
>  
>  
> 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
> 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 9:53 PM
> To: Miata Power List; Miata Mailing List
> Subject: Re: '02 Miata Bucking Without CEL - Big Mystery!
>  
>
>
>
>
> It's worth noting that this happened with the tank about 1/2 to 3/4
> full.  Is there any way to clear out the condensation? 
Some
> sort of alcohol-based solution?
>  
> -Bryan
>
> --- On Mon, 5/26/08, Ray Ayala <ayala.ray at gmail.com> wrote:
>
> From: Ray Ayala <ayala.ray at gmail.com>
> Subject: Re: '02 Miata Bucking Without CEL - Big Mystery!
> To: bryanewyatt at yahoo.com, "Miata Power List"
> <miatapower at miatapower.net>, "Miata Mailing List"
> <miata at realbig.com>
> Date: Monday, May 26, 2008, 9:42 PM
>
>
> My dad had that happen once and it turned out to be condensation in the
> fuel tank.  Apparently a few small puddles of water will
drift
> around on the bottom of the tank and part of one will occasionally get
> sucked up by the fuel pump.
>
>  
>
>  
>
>
> ----- Original Message -----
>
> From: Bryan Wyatt
>
> To: Miata Power List ; Miata Mailing List
>
> Sent: Monday, May 26, 2008 4:41 PM
>
> 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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>  
>
>
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