280Zone Posted March 24, 2006 Share Posted March 24, 2006 I spent the better part of last night searching this topic. I just swapped in an 81 turbo engine into my 75 and got it wired good enough to start and run. However it is running very rich, so rich it won't even idler and revs rough. Most opinions I found last night pointed to the water temp sensor, so I attacked that first. I replaced the connector, pulled out the sensor and cleaned all corrosion off of it and test continuity, all seemed fine. When the car is running I can disconnect the wire and no change happens. So I attempted to find where this wire goes. I can't seem top find the other end to test wire continuity. Does anyone know where that wire goes? From the factory wiring diagram it seems to only be a activator switch for the injector fan (which I don't have) but I can't find where that wire comes back out of the harness. Am I on the right track or am I missing something else that could be causing rich condition? Quote Link to comment Share on other sites More sharing options...
AK-Z Posted March 24, 2006 Share Posted March 24, 2006 Also check the AFM connection and to see if you have the right O2 sensor, If I recall, there were 2 different 02 sensors used and aren't interchangable. Quote Link to comment Share on other sites More sharing options...
280Zone Posted March 24, 2006 Author Share Posted March 24, 2006 Happened to check the AFM connection after I posted and found it was a bit loose. I think I might be getting close now: ) Quote Link to comment Share on other sites More sharing options...
george.bryant Posted March 25, 2006 Share Posted March 25, 2006 I dont even run a O2 Sensor at the moment and my motor runs ok... Quote Link to comment Share on other sites More sharing options...
mario_82_ZXT Posted March 25, 2006 Share Posted March 25, 2006 Check the Cylinder Head Temp Sensor, both it and its harness to the ECU. Mario Quote Link to comment Share on other sites More sharing options...
VinhZXT Posted March 27, 2006 Share Posted March 27, 2006 Definitely check the AFM connector and the ECU connectors. I accidentally left my AFM unplug at one point and started the car up and it smoked like a chimney because too much fuel. The temp sensor richen the mixture but not comparable to the enrichment of the AFM. GL Quote Link to comment Share on other sites More sharing options...
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