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Just to clarify... >checking I unplugged the temp sensor on top of the oil cooler (oil temp sensor?) I just got done searching to define this part. It is the Oil Pressure switch that receives current from the Automatic transmission and is part of air regulation. The Volkswagen Service Manual on vwtype3.org tech section describes it as: "On 1972 models, additional air is injected to lean the mixture during coasting rather than cutting off the fuel supply. Figure 34 shows the system used on models equipped with a manual transaxle. When coasting, the throttle valve closes and a high depression (vacuum) exists in the intake air distributor. This vacuum operates a valve (1) which opens and admits air from the air cleaner around the throttle valve to lean the mixture. A slightly different valve is used on models with automatics. An oil pressure switch on the automatic transmission generates an electrical signal to open the air valve. Otherwise, operation and function of the valve is identical to that on manuals." Jason Smith '72 Fastback FI AT '97 Jetta jasontsmith@alumni.pitt.edu http://jasontsmith.tripod.com/vw.htm ------------------------------------------------------------------- Unsubscribe? mailto:type3-request@vwtype3.org, Subject: unsubscribe