Anyone have a picture of a smog pump installed on a 1.8? Options

[DaveB]

Need help again. I found out my car was originally from California. Any indication of smog equipment is gone. So how is the smog pump mounted to front of the engine? I've seen the parts and would like to see an engine with this installed.

Thanks,

DaveB

[wonkipop]

@914Mels

those docs you posted are great.
test procedure for EGR makes it clear how it operates at higher revs off intake vacuum (pre throttle plate in throttle body) rather than idle manifold vacuum.

EGR line should be cool after EGR valve to intake boot at idle.
supposed to get warm when you hold it at 4200 rpm.

the EGR let them reconnect to that throttle body port upstream of throttle plate with the distributor vacuum advance port again just like the 49 state cars in 74.
meant you could regain the vacuum advance function of distributor for highway cruise and part throttle just like earlier VWs without causing increase in NOx emissions.
i believe the EGR by feeding in exhaust gases lowered combustion temps and that lowered NOx. you got a bit of benefit reburning some exhaust gas but i believe the main objective of feeding in that exhaust gas was to lower combustion temp slightly at cruise - just enough to get the NOx down.

it wasn't all bad that emissions gear by the time you got to the 75 cal car.
EFI helped compared to carb equiped domestic USA product.
main problem was it was expensive kit that raised the price of the manufacture.
but i don't think it really hindered performance too much.
the big hit on that front was lowered compression for unleaded fuel since the first unleaded fuel was much lower octane.

countries like australia and japan got lucky because we sat back a few years and let it get ironed out in the USA before we adopted the standards. by then all this stuff was well and truly resolved.