code 44 - why?

[Bruce Plecan]

M5 meaning 5 Spd?.
If so then different IAC strategies, and that might be enough for a
borderline case.
Might be a marginal sensor and just lame enough that it makes a difference.
Also, might look at what the high and low Os voltages are in those bins.
When you'r selling a couple million vehicles and playing the EPA game not
all makes sense
Bruce



From: "den Broeder, Ernst" <edenbroe at cisco.com>
Subject: code 44 - why?
> I had an interesting experience with my TPI setup in the past 2 days since
> I got it running.  It's a 1989 MAF '165 system on a 5.0L with TPI.
> I have been using AUJM (350, auto, 3.27, FED) and it keeps setting code 44
> on me.  I switched over to a APYS (305,M5,3.45) and the problem goes
away...
> Could someone please explain why I see this behavior?  I checked through
> the archives and found a few tidbits that lead me to believe it's just a
> case of the definition of what is lean and what is rich...?   What I don't
> understand is why it would be different for different engine
> displacements.  Could it be because the O2 sensor is sensitive to the
extra
> back pressure a 350 (as opposed to a 305) would apply against a set of
> factory exhaust manifolds?
>
> Ernst

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