Re: [Amc-list] EFI install on [anything modest]

[Kelly Hardie <keleigh3000@xxxxxxxxx>]

As someone who deals with OBDII systems on a daily basis, I'll tell you 
that monitoring engine efficiency and performance is somewhat of a 
secondary function for the oxygen sensors. Their primary functions are 
1) maintaining catalyst efficiency and B) monitoring other control 
systems for errors. These systems are so sophisticated and so dialed in 
that you'd never notice the difference under 99% of conditions if you 
disconnected them (assuming everything else is working correctly). 
Customers with bad lambda sensors almost never have driveablity 
complaints, only "MIL on"...

Kelly

Sandwich Maker wrote:
> " From: Tom Jennings <tomj@xxxxxxx>
> " 
> " The only thing I've read "bad" about Howell and others is from
> " people who tried to set them up without enough sensor feedback,
> " "open loop", and feedback is the whole POINT of FI. Except for
> " those few, I've not heard a bad thing about Howell.
>
> i disagree about feedback.  it's the only practical way to zero in on
> perfect mixture under widely and wildly changing conditions, but i've
> always thought that to a degree it was a crutch for systems that
> didn't have the proper sensors to read the environment going in.  our
> injected '71 saab didn't have no stinkin feedback and it had more hp,
> ran better, and got better mileage than our otherwise-identical carbed
> '71.  as far as i could determine, the engines were identical
> internally; only the induction system differed.  this was btw an
> analog system, based afaik on bendix patents that may have been on the
> '57 rebel system.
> ________________________________________________________________________
> Andrew Hay                                  the genius nature
> internet rambler                            is to see what all have seen
> adh@xxxxxxxxxxxxxxxxx                       and think what none thought
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