'79 getting poor fuel mileage

[tberk@mindspring.com (T Berk)]

Joe Doty wrote:
> 
> It's getting about 20 mpg.  The car runs great, but my bro said I was
> puffing black smoke when I got on it.
> 
> I've replaced cap, rotor, wires, plugs, fuel filter, and injector
> o-rings.  Ignition timing at idle is maybe 7 degrees BTDC.
> 
> This thing also has an EGR valve (yuch), with no lambda control.
> 
> Should I just take it to a shop and have them set the CO% at idle?  Or
> is there something else I could try first?  Maybe a warmup regulator?  I
> have plenty of spare parts...I was just looking for some ideas before I
> took it somewheres.
> 
> Thanks!
> 
> Also, re: my brother's wrecked car...not even 24 hours had passed and he
> already picked up the "new" '77 rabbit!
> 
> Joe Doty

Try cleaning out the interior of the motor (rings & valves) and THEN
go have the fuel to air ratio set. The black smoke sounds like too
much fuel, hence bad mileage.

Try some Marvel Mystery Oil in the crank case, heck if your going to
swap it try a qt. of ATF and let it idle a while then sit over night,
idle the next day and swap oil. 

Then there is that Seafoam stuff we've been talking about, but yeah
I'd get the A/F ratio set.

TBerk