high fuel consumption / cold start / rough idle

[rogercv1 at gmail.com (Roger concha)]

make sure your O2 sensor is working correctly, if it's not it will run rich

On 4/26/05, Mark Malowicki <yurple@hotmail.com> wrote: 
> 
> 
> Hello!
> 
> I have a 1983 Scirocco with the 1.8L, and a while back it started having
> cold start problems. I checked the thermo time switch, cold start valve,
> and aux air regulator, and they all checked out fine.
> 
> Then, recently it started having rough idle problems -- drops down a few
> hundred rpm, shudders, then recovers, drops, recovers, etc. It seems to 
> run
> fine otherwise.
> 
> AND THEN, this past weekend I noticed the fuel mileage has gone way down
> -- I usually get ~33mpg, now I'm getting 23 or so. I rechecked the cold
> start valve, but it still checks out ok -- sprays fuel when cold, no leaks
> when warm.
> 
> What could explain all of these symptoms? Warm up regulator??? I checked
> the resistance across it, and it's OK, at 16ohms. Any suggestions?
> 
> - Mark
> 
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