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On 10 May 2004 at 7:18, Greg Merritt wrote: > Well, in the f.i. car, the cold start valve can only work > when the starter is turning over -- AND when it's cold out. As soon > as the starter quits working, the cold start valve is all done. > (It's wired on the + side off of the starter, and on the - side it's > grounded via a temperature switch.) The choke, on the other hand, > continues to operate while the cold car is warming up. You're right, but the CSV still acts more like a choke than anything else. On a carbed engine the choke does 3 functions: starting richness, warmup richness, and idle rpm boost. In the FI, those 3 functions are separated. The CSV (as well as some circuitry in the brain) covers the starting richness, the warmup richness is covered by the temp sensors, and the idle rpm boost is covered by the AAR. Muir just disconnected the CSV, but there was another wire from the starter to the brain that he COULD have disconnected. I don't know if he did this or not. I don't recommend it, however. Russ likes to disable the CSVs. I leave them working. Both of us seem to do fine. If you live in a warm climate there is no down side to removing the CSV since it should never kick in anyway. I should also mention that most 68-9 FI cars never came with a CSV anyway. -- Jim Adney jadney@vwtype3.org Madison, WI 53711-3054 USA ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org