zacward Posted September 6, 2012 Share Posted September 6, 2012 Hello, I have a 77 280z that I've had sitting for a while now after I spun a bearing. I have a new motor on the stand that is rebuilt, just have a few questions about some modifications and the sensors. I have no egr, a hooker header, but everything else is stock. First, I have a blockoff for the 7th injector/choke. Can i get rid of the thermotime switch? My understanding is that the switch only keeps you from flooding the engine on startup by disabling the 7th injector. Since I have no 7th injector, more cranking time may be required during colder days. Second, Im using a ka24de throttle body, can I get rid of the BCDD? Obviously it has nowhere to go on the new throttle body. Third, one sensor on the thermostat housing (it has a single wire, is bigger than the others, and is mounted higher) the wire for the sensor came off. What is the sensor and what does it do? Quote Link to comment Share on other sites More sharing options...
zacward Posted October 21, 2012 Author Share Posted October 21, 2012 Got the car running, dont need the thermotime switch, cold start injector, or egr. AEM Uego says 10-12 afr at warm idle. As for that coolant sensor, no idea what it does but I dont have it. Car runs just fine though. Quote Link to comment Share on other sites More sharing options...
Pharaohabq Posted October 24, 2012 Share Posted October 24, 2012 So long as the Temp gauge is still functioning you probably don't need that sensor. I'm not certain, but I think it was the temp sensor that controlled the cold start. I'd have to see a pict to know which you were talking about. But since you're using AEM, it's kind of a moot point. Cold start is probably never needed in TX anyway. Quote Link to comment Share on other sites More sharing options...
zacward Posted October 24, 2012 Author Share Posted October 24, 2012 Cold start is still important in the winter mornings, but it just takes a little cranking to get started. On the thermostat housing Im only using the ecu temp sensor and the coolant gauge sensor. Cleaned out the idle adjustment port and adjusted timing and idle to 800rpm warm and afr at 13.6 Quote Link to comment Share on other sites More sharing options...
NewZed Posted October 25, 2012 Share Posted October 25, 2012 All of the sensors are described in the FSM. Some have interesting functions. Have you looked under your distributor cap yet? Quote Link to comment Share on other sites More sharing options...
zacward Posted October 25, 2012 Author Share Posted October 25, 2012 I have, why? Just a basic electronic distro with cap & rotor as far as I know. I mainly work on new cars so its kind of a break to work on an early injection system. Quote Link to comment Share on other sites More sharing options...
NewZed Posted October 25, 2012 Share Posted October 25, 2012 Thought you might have a second pickup coil and wonder how it gets used. No biggy, enjoy the old EFI system. Quote Link to comment Share on other sites More sharing options...
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