Alfa Romeo 164 24v V6 cam angle sensor (CAS) is located in rear of rear (right head) underneath the throttle body on intake plenum so a bit hard to see. It acts as a timing sensor which recognizes the explosion of the #1 cylinder. See page 562 in 94 wiring manual. It reads off a degree wheel on end of #4 (rear head) exhaust cam on a 120 degree "tooth" before top dead center of #1 cylinder. It also works in conjunction with two knock sensors located in valley of engine between heads. Check under area of black corrugated intake hose for connector's condition of both CAS and Knock Sensor 2 Note: The 3-wire Bosch connectors are not "murphy proof" and can be mixed up with rear knock sensor connector and CAS. I would also check both front and rear knock sensor connectors for condition (crumble easily). It maybe a knock sensor that is actually causing CAS code to be stored in memory. Front knock senor connector near back of timing belt cover by intake tube, rear connector near CAS connector. Also note RPM/Timing sensor 3-wire connector on front of each can be interchanged with front knock sensor so be careful when checking and rehooking up connectors. Clean connectors with electronic connector cleaner and pack with dielectric grease. Alfisto Steve In a message dated 1/6/2010 12:48:59 P.M. Eastern Standard Time, [email protected] writes:
Date: Mon, 4 Jan 2010 23:21:54 -0500 From: "Doskow, Jack Edward" <[email protected]> Subject: [alfa] '94 164 Camshaft Angle Sensor trouble ? Hi ! Has anyone had trouble with the Cam angle sensor error code (1-2-5-5) ? The manual shows a big arrow pointing to where it is but of course it's not visible in the actual car. There is no explanation of what it does or how it works (magnetic ? toothed ring like ABS, proximity sensor ?) or which of the 4 cams angle it measures. Strangely i get the error intermittently, often accompanied with engine miss which requires immediate clutch engagement to avoid lurching of the vehicle, only when the engine is cold, when warmed up it does it rarely to never. Could the sensor really care about temperature, or could the camshaft itself have some slop until it is warm ? Thanks for any insight into this bizarre behavior ! jak bloomington IN '94 164Q -- to be removed from alfa, see http://www.digest.net/bin/digest-subs.cgi or email "unsubscribe alfa" to [email protected]
