Running without a smog pump?

[TomO]

The bearing/bushing has failed on the smog pump on my '87 Isuzu Trooper
2.3L.

What problems will likely be caused if I just remove the belt ( it's all
on its own ) and don't bother to replace it? I don't live in a place
where emissions tests are required.

--
TomO

[twisted]

No biggie.

[m6onz5a]

On Nov 23, 3:45 pm, TomO <tom@_nospam_towens.com> wrote:

remove it and keep driving. Your engine light might come on but don't
worry about it.

[dsi1]

Smog pump - blast from the past. :-) As I recall, the pump injects air
into the exhaust during deceleration to burn up the rich fuel mixture
brought about by the sudden closing of the throttle. Removing it sounds
like a good idea to me, your car would probably be a little quieter and
have a little less drag on the engine.

[Scott Dorsey]

You're apt to clog the converter up a little bit faster without it, though.
And of course you really _are_ producing more emissions.

Get one from a junkyard and bolt it up.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[Ad absurdum per aspera]

> Get one from a junkyard and bolt it up.

Agreed. Although often removed (at least between smog checks) back
in the day by people convinced that their smog equipment in general
was robbing them of power, the Air Injection Reactor pump is a pretty
harmless little thing, consuming only a fraction of a horsepower and
doing a fair bit to keep unburned mixture out of the atmosphere. You
might also notice some pinging without it.

http://en.wikipedia.org/wiki/Secondary_air_injection

--Joe

[ben91932]

As I recall, the pump injects air
> into the exhaust during deceleration to burn up the rich fuel mixture
> brought about by the sudden closing of the throttle.

Actually most systems inject air all the time *except* deceleration.
The ultra rich mixture with the fresh air causes backfires in the
exhaust, and had a valve to do the switching.
During the late '70's early '80's I saw many GM cars with exploded
mufflers from bad anti-backfire valves.

If you just remove the belt, all the plumbing will eventually rot,
which would get expensive if it ever needed to be smog inspected.
A better solution is to remove it all and plug the ports in the
exhaust manifold.
BTW, if you are any kind of tree hugger, your car will be emitting
many times more HC and CO pollutants......
not trying to sound like an enviro-whacko... just sayin...
HTH
Ben

[dsi1]

ben91932 wrote:
> As I recall, the pump injects air
>> into the exhaust during deceleration to burn up the rich fuel mixture
>> brought about by the sudden closing of the throttle.
>
> Actually most systems inject air all the time *except* deceleration.
> The ultra rich mixture with the fresh air causes backfires in the
> exhaust, and had a valve to do the switching.
> During the late '70's early '80's I saw many GM cars with exploded
> mufflers from bad anti-backfire valves.

Ahh... you are right about this. Guess I got it all mixed up. Thanks for
setting me straight.