[DMCForum] Re: de-emissioning (Marc)

["content22207" <brobertson@xxxxxxxxxxxx>]

I thought I made that clear in my post:

EGR: I oppose the concept of making an engine breathe its own exhaust.
EGR is a fuel economy measure anyway, not emissions. This particular
system was MUCH larger than the old fashioned diaphragms too, which
put it all in my way.

Smog pump: Again, the plumbing was in the way (couldn't remove
passenger side spark plugs with it in place). Would have been useless
once I put the new exhaust system on anyway.

Thermactor bank: Overlayed the coil, which made installing its wire
difficult. Also had to be removed to remove the driver side valve
cover. And without a smog pump the thermactors have nothing to do.
Jetisoning them also allowed me to jetison those stupid hard plastic
vacuum lines.

The engine compartment looks much less cluttered now. I really don't
like to see a thousand wires & hoses when I pop a hood. I definitely
don't like to work around them. Simplicity used to be a virtue...

Bill Robertson
#5939

>--- In DMCForum@xxxxxxxxxxxxxxx, Marc Levy <malevy_nj@xxxx> wrote:
> And your reason for doing this was........?
> 
> 
> 
> --- content22207 <brobertson@xxxx> wrote:
> 
> > Only removed EGR, smog pump, and the thermactor bank
> > (and the vacuum
> > canister associated with the thermactor bank). EGR's
> > supposed to help
> > with fuel economy, but I oppose making an engine
> > breathe its own
> > exhaust on principle if nothing else. This
> > particular EGR sent signals
> > back to the engine management computer, so without
> > its rheostat the
> > computer thought it was wide open and leaned my
> > mixture out too much
> > (the joys of EFI screwing around with mixture). I
> > tied the rheostat
> > lines together so now the computer thinks EGR is
> > closed all the time
> > -- considering it has a pipe plug in its port, it
> > essentially is
> > closed all the time. I figure the O2 sensor can deal
> > with any
> > enrichment issues that may cause. Smog pump has
> > absolutely no effect
> > on an engine (is piped into the exhaust side) other
> > that drag. Its
> > plumbing however was all in my way (couldn't reach
> > the passenger side
> > spark plugs). Without the smog pump, there's no need
> > for the
> > thermactors. Without the thermactors, there's no
> > need for their vacuum
> > canister. Without the vacuum canister, there's no
> > need for those silly
> > hard plastic vacuum lines (remaining vacuum lines
> > have been replaced
> > with fuel line hose).
> > 
> > Plugs look good and fuel economy is comparable to a
> > 2 barrel (15-16
> > MPG), so I consider the de-emissioning a success.
> > This was the first
> > time I ever de-emissioned an engine with computer
> > controlled ignition
> > & fuel delivery so I wasn't sure how it would turn
> > out. 
> 
> 
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