[Miata] '02 Miata Bucking Without CEL - Big Mystery!
Bryan Wyatt
bryanewyatt at yahoo.com
Wed May 28 09:41:08 CDT 2008
Where would I look to conduct said wiggle test?
-Bryan
--- On Wed, 5/28/08, Bill Cardell <Bill at flyinmiata.com> wrote:
From: Bill Cardell <Bill at flyinmiata.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: Wednesday, May 28, 2008, 10:39 AM
Maybe What the TPS does is tell the car when to idle, invokes
decel fuel and supplies the signal for TPS based enrichments and maybe ignition.
If it gave a closed throttle signal when actually open and the car
was above the rpm threshold for decel cut it would shut the fuel off. So it
could do it. A good wiggle test under the hood would be a good idea,
too.
Bill Cardell
TurboDog's Dad
www.flyinmiata.com
www.fmwestfield.com
orders 1-800-FLY-MX5S
tech support 970-464-5600
Don't miss Flyin' Miata's Open
House! Aug 14-17, 2008
From: miatapower-bounces at miatapower.net
[mailto:miatapower-bounces at miatapower.net] On Behalf Of Bryan
Wyatt
Sent: Wednesday, May 28, 2008 5:05 AM
To: 'Miata Power
List'; 'Miata Mailing List'
Subject: RE: '02 Miata Bucking Without CEL
- Big Mystery!
While we're on the subject, are there any handheld readers that read
pending codes? I'm 99% sure the one I bought from my local FLAPS
(that allows me to clear codes) can't read them. Otherwise, this
unit looks tempting--though I hope I get this thing solved now so it's not
an issue.
Also, Bill, Larry's actually the second person I've heard mention a
defective TPS. Any thoughts?
-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, 7:15
AM
#yiv1738583227 UNKNOWN {
FONT-FAMILY:"Cambria Math";panose-1:2 4 5 3 5 4 6 3 2 4;}
#yiv1738583227 UNKNOWN {
FONT-FAMILY:Calibri;panose-1:2 15 5 2 2 2 4 3 2 4;}
#yiv1738583227 UNKNOWN {
FONT-FAMILY:Tahoma;panose-1:2 11 6 4 3 5 4 4 2 4;}
#yiv1738583227 #yiv952707029 P.MsoNormal {
FONT-SIZE:12pt;MARGIN:0in 0in 0pt;FONT-FAMILY:"Times New Roman", "serif";}
#yiv1738583227 #yiv952707029 LI.MsoNormal {
FONT-SIZE:12pt;MARGIN:0in 0in 0pt;FONT-FAMILY:"Times New Roman", "serif";}
#yiv1738583227 #yiv952707029 DIV.MsoNormal {
FONT-SIZE:12pt;MARGIN:0in 0in 0pt;FONT-FAMILY:"Times New Roman", "serif";}
#yiv1738583227 #yiv952707029 P {
FONT-SIZE:12pt;MARGIN-LEFT:0in;MARGIN-RIGHT:0in;FONT-FAMILY:"Times New Roman", "serif";}
#yiv1738583227 #yiv952707029 SPAN.emailstyle18 {
}
#yiv1738583227 #yiv952707029 SPAN.emailstyle181 {
COLOR:black;FONT-FAMILY:"Calibri", "sans-serif";}
#yiv1738583227 #yiv952707029 SPAN.EmailStyle20 {
COLOR:black;FONT-FAMILY:"Calibri", "sans-serif";}
#yiv1738583227 #yiv952707029 .MsoChpDefault {
}
#yiv1738583227 UNKNOWN {
MARGIN:1in;}
#yiv1738583227 #yiv952707029 DIV.Section1 {
}
It
might pay to get an OBDII scanner that can log and drive around with it
for when the problem starts and see if you can find
anything.
I
use this unit http://obddiagnostics.com/
You
do need a laptop but you can set it up to log and you can also run it so
all the functions are being shown on the screen at the same time so you
can see the data real-time.
Bill
could this somehow be TPS related since he says it only happens at
partial throttle??
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: Tuesday, May 27, 2008 7:05 AM
To: 'Miata
Power List'; 'Miata Mailing List'
Subject: RE: '02 Miata
Bucking Without CEL - Big Mystery!
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
_______________________________________________
Miatapower
mailing
list
Miatapower at miatapower.net
http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://list.realbig.com/pipermail/miata/attachments/20080528/81f903eb/attachment.html
More information about the Miata
mailing list