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On Wed, 16 Oct 1996, mark R lewis wrote: > dear greg, i have had the ECU checked by a pro and there is > nothing wrong with it so it must be a sensor proper beyond > that i cannot say. > Mark Hi Mark, the temp sensors are not that expensive, and only really play a big role during warm-up. If you were *really* nuts, you could replace them with dash-mounted variable resistors... The temp sensors are little semiconductor devices whose resistance *decreases* as they get hotter. The sensors that remain are the manifold pressure sensor (critically important) and the throttle position switch (also important). The pressure sensor is how the brain determines how much air is being ingetsted by the engine. The throttle positioner lets the brain know if you floor it, so that it can enrich the mixture--just like an accelerator pump on a carb. Oh--I suppose that you would also consider the extra pair of points in the base of the distributor to be a kind of sensor--if these aren't sending a signal, the injectors won't ever open! -Greg '71 squareback '63 Beetle