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On Tue, 22 Jul 1997, Melissa & Jim wrote: > On 22 Jul 97, Woolston Craig wrote: > > > Not sure how much help this is but you are running too rich. Is > > this FI or Carbs? If FI make sure that your voltage at the battery > > at fast idle is at least 14.1 to 14.4 volts (use only Bosch voltage > > regulators), the pressure regulator is set at 32 psi, and the > > throttle position switch is adjusted correctly. Other things to try > > but more difficult to test, is leaking injectors or try swapping > > pressure sensors. > > This is all correct except that 32 psi is just a bit high. The spec > is 28-31, but I don't know if reducing it will help any. The system > regulating voltage is the most important thing and may be exactly > your problem. True, though bad pressure sensors have been known to lead to very rich mixtures. The voltage is, of course, the very first thing to check, but if that doesn't seem to be the problem check the pressure sensor. While this is just a fairly crude test, the resistance between terminals #7 and #15 should be about 90 ohms, between terminals #8 and #15 should be about 350 ohms. Also make sure the diaphragm is not leaking; you can just blow into it to test that. Once you know it is working, you can adjust the mixture via the pressure sensor adjusting screw. Clockwise leans out the mixture, counterclockwise makes it richer. On a couple of T3's I've been able to use this adjustment alone while hooked up to the smog test equipment to get the car to pass. It's worth a try anyway. Norm. ---------------------------------------------------------------------- Norman Kraft | (h) nkraft@bkhouse.cts.com (w) nkraft@ormed.edu Pacific College of | "No man steps in the same river twice, for it's Oriental Medicine | not the same river and he's not the same man" San Diego, CA | - Heraclitus ----------------------------------------------------------------------