That's correct re. both the zones and the keypad display. The letter 'w' should
also be displayed in that screen if the ECU is set to use a wideband O2 sensor.
It's a good idea to also chack ALL other sensor readings to see if they appear
to be in the correct ballpark because some things (like temperature) will alter
effective targets when they have unusual values.
As for the old ECU's settings, they have been know to change all by themselves
as well as when the ECU is subjected to either physical or electrical trauma.
----- Original Message -----
OK. I'm not sure if I completely understand what you are telling me. I have
split up what you wrote in your message, and see if I get this right.
"If the lambda value displayed on the keypad is higher than the value stored in
the O2 target zone" - Is this the value in zones Z26 thru Z31?
" for the current manifold pressure then the autotuning leans out the fuel, so
it's important to know what numbers are in the target zones" The settings for
the WBO2 for the zones mentioned above are, 22 for zone 100, and 24 for 200
(ect), 29, 44, 58 and 66 for zone 600.
and how they compare to the displayed lambda values. - I am not clear which
window on the keypad this would be? I need to get a refresher on this. Is this
in the Lambda Screen, or the INJ%-O2 screen? Or something else?
One other thing I did not mention is that ECU was never altered from the time I
removed it from the wrecked car until I fired it up the new car. No changes
were made to the software or settings. I started it up on the previous maps and
settings from the start. It performed great in the old installation, but
immediately started the fuel leanout problem as soon as I turned it on in the
new car. The settings are all the same, except for the fuel which now has been
changed by the ECU. I reloaded the old fuel maps for a starting point, but the
ECU keeps trying to lean it out.
I hope this information helps. Let me know.
Thanks.
Ken M
--------------------------------------------------------------------------------
From: [email protected]
To: [email protected]
Subject: Re: Requesting some help with a Link for Miata, 1994-95 (2)
Date: Sun, 4 Sep 2011 14:04:16 -0700
If the lambda value displayed on the keypad is higher than the value stored in
the O2 target zone for the current manifold pressure then the autotuning leans
out the fuel, so it's important to know what numbers are in the target zones
and how they compare to the displayed lambda values.
----- Original Message -----
From: Ken Maguire
To: Ray Ayala
Sent: Sunday, September 04, 2011 1:29 PM
Subject: RE: Requesting some help with a Link for Miata, 1994-95 (2)
Ray, To be honest, it has been a while since I worked on it. But what would
normally happen is, I could start it up, and it would run in closed loop? until
the timer expired. Once the timer expired, and it would switch to running off
of the O2 sensor, you could watch the O2 readings go from 14.X and steadily
drop down to 10.0, and then die, unless I intervened and manually start adding
fuel back to the map. Is that what you are asking?
I don't believe that I have a datalog that captures the event, I was going to
do one, but never did. Would that help? Or do you think there is another
approach?
Thank,
Ken M
------------------------------------------------------------------------------
From: [email protected]
To: [email protected]
Subject: Re: Requesting some help with a Link for Miata, 1994-95 (2)
Date: Sun, 4 Sep 2011 13:16:15 -0700
How do those numbers compare with the target for the zone you're in?
----- Original Message -----
From: Ken Maguire
To: Ray Ayala
Sent: Sunday, September 04, 2011 12:52 PM
Subject: RE: Requesting some help with a Link for Miata, 1994-95 (2)
As it leans out, you can watch in on the keypad as the numbers drop.
Ken
----------------------------------------------------------------------------
From: [email protected]
To: [email protected]
Subject: Re: Requesting some help with a Link for Miata, 1994-95 (2)
Date: Sun, 4 Sep 2011 12:52:11 -0700
As the car leans out, does the displayed lambda stay fixed, go up or down
steadily, or wander around?
----- Original Message -----
From: Ken Maguire
To: [email protected] ; Ray Ayala
Sent: Sunday, September 04, 2011 12:38 PM
Subject: RE: Requesting some help with a Link for Miata, 1994-95 (2)
LeGreat
I have taken the connection apart several times, and re-checked it. Each
time it comes out to the same conclusion, which matches the instructions from
FM, and the previous installation notes. Unless I really have lost my mind, it
does not appear to be the source of the problem.
I had three WB sensors, the first one, the one from my son and the brand
new one. I installed each one in the exhaust and hooked it up to the Link, each
one functioned the same, and the Link to pulled fuel. What would be the chances
that all three are bad? I thought there was a way to check the sensor? I can't
remember if there is and if I did check it, it has been a while.
Ray,
Thanks for the reply.
When I installed each new component, I have a specific check list that I
go through setting it all up. I keep a log of each set-up, with notes on each
parameter for each setting. The O2 setting is set for the WB configuration,
and the O2 targets are set as required for theLink, which is, 22, 24, 29, 44,
58 and 66. I have data-logged the car to try and find the problem, but the
problem is with me because I am not an expert is reading the logs. I'm not sure
that it could be found that way on not. Maybe you would know.
Thanks for the input guys. Unless I am brain dead, and the WB is not
installed correctly, I am still wondering if the problem is in the harness
(maybe)?
Ken M
--------------------------------------------------------------------------
To: [email protected]
Subject: Re: Requesting some help with a Link for Miata, 1994-95 (2)
From: [email protected]
Date: Sun, 4 Sep 2011 13:25:58 -0400
...that is, perhaps the WB02 sensor end in the exhaust isn't working,
even though you replaced it once. Are you certain it is connected properly and
the Link is set to WB02?
-----Original Message-----
From: legreatone <[email protected]>
To: miatapower <[email protected]>
Sent: Sun, Sep 4, 2011 1:21 pm
Subject: Re: Requesting some help with a Link for Miata, 1994-95
I know the message was intended for Ray, but it may be that the WB02
isn't working right. It may be that the link is responding to the input
received from the WB02.
Jerry aka LGO
-----Original Message-----
From: Ken Maguire <[email protected]>
To: miatapower <[email protected]>
Sent: Sun, Sep 4, 2011 12:30 pm
Subject: Requesting some help with a Link for Miata, 1994-95
Dear Ray,
A fellow member on Miata.net (Fergus) gave me your contact info, and said
that you may be able to help me with a problem that I am having with my Flyin
Miata, turbo charged Miata with a Link ECU. The story is long, but I will
shorten it a bit.
I had a 91 Miata that I built using the framework from a 95. A 95 engine
and wiring harness. I installed a FM turbo kit and drove it for several years
with no problem. That car was involved in an accident three years ago, and
totaled. So I bought a 91 Mariner Blue (which I wanted for along time), and
stripped that car down and rebuilt it from the ground up. I incorporated all of
the stuff from the totaled car, plus more upgrades into the new 91 chassis. The
only thing that was not the same was the wiring harness. The 95 harness in the
totaled car was somewhat incomplete, and I had a complete harness from a 94, so
I used that one instead.
After 4 months of building the car, I had it finished. It started and ran
pretty good, except for a oil leak that I had to correct. I took it out for a
drive to work on some tuning, and it developed a problem with the WB02 sensor.
For some reason, the autotune feature was removing fuel from the map until it
went completely lean, and would stall. It would do this while idling or
driving. The WB02 I have is a AME non-gauge type, so I borrowed a Gauge type
from my son and hooked it up to read the exhaust gasses while the non-gauge was
used with the ECU. The gauge type mirrored the readout on the keypad, and I
assumed that the WB02 had gone bad. I purchased a new WB02, complete with
controller, and installed it. At first it appeared to resolve the problem, but
did not. The ECU kept removing fuel from the map.
I then thought that something was wrong with the ECU. I had a problem
with it a while back where something got burnt on the circuit board, and had it
fixed by Flyin Miata. So I removed it, and there seemed to be a new problem
with a capacitor on the board. I found a local shop to fix it for me, and
re-installed it, but that did not change anything. The chip in it was not the
latest chip, so for fun, I wrote FM and got them to burn me a new chip with the
last software revision on it. That did not change anything. I was able to find
a used Link for a 94-95, that was in good condition, with no repairs, and
installed it in place of the one I had, that did not change anything.
I then thought, well maybe it's the wiring harness, since that is really
the only thing that was not used from the first car. But it is suppose to be
the same as the early 95. I know that it is not "Exactly" the same, because I
went over the complete harness before installing it and I could see some
obvious differences in, but the the ECU, it should not have mattered. So I am
not sure if I should go ahead and remove the 94 harness and re-install the 95
that I know worked?
Can you think of something that I am overlooking? I am hoping that it is
something simple that I just can't put my finger on. I was hoping that someone
with your expertise may be able to see something that I cannot.
Thank you for taking the time to read about my problem, and I hope you
can shed some light on this perplexing problem.
Ken Maguire
Louisville, Ky
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