[net.auto.vw] The Last Word on CAT and EGR

Tom@sri-unix (07/20/82)

This is getting rediculous!  Somebody originally posted a message asking
about his "ENG" (sic) light.  I gave him a reply discussing the "EGR"
light (which comes on every 15k miles and is reset by pressing recessed
button on a black box connected to the speedo cable).  Now all I see
is ranting and raving about the "CAT" light, and nobody ever asked
about that.  Anyway, for the record, early (no fuel injection) Rabbits
had catalytic converters and heat sensors: the CAT light would go on if
the converter got too hot.  In 1979 (I think) the emmission regulations
got strict enough that catalytic converters were required again in
49-State models.  But now there is no heat sensor.  I guess the fuel
injection system is precise enought that the converters will not overheat.
You may be interested to know that overheating problems were apparently
common to all cars at that time.  One Detroit manufacturer stated that
the smouldering of the floormat in the car was the warning that the
converter was malfunctioning!
Rabbits without catalytic converters have a "CAT" light on the dash, but
there is no bulb (or socket for that matter) behind the bezel.

Tom Almy
decvax!teklabs!tekchips!toma  (or)
ucbvax!teklabs!tekchips!toma

wagner (07/25/82)

Not to be too gloomy, but I would watch out for overheating
catalytic converters on non-fuel injected rabbits.  I saw
one go up in flames on the highway once on my way back from
Ithaca.  The driver must have had a little time, because he
got to the side of the road and out of the car.  But the car
went up fast.  If you think where the converter goes in 
relation to the fuel tank, you can see why.  It sprayed fuel
all over the shoulder (read car in the right-hand lane if he
hadnt gotten off the road fast!).  Saw two more cars go up
in flames in California on my recent trip there.  Does this
happen more often in the states than up here where it is colder,
or was this just coincidence (3 to 0)?

Michael Wagner, UTCS