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Four wiring/sensor questions

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Old Aug 11, 2012 | 09:57 PM
  #1  
Fronzizzle's Avatar
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From: Augusta Township, MI
Car: 1985 IROC-Z
Engine: 383
Transmission: 700R4
Axle/Gears: 3.73
Four wiring/sensor questions

I'm in the process of installing my new wiring harness & 730 ECM and I ran into a couple of issues. I'm hoping someone can help...

1) The wire for the coolant temperature sensor is on the same branch as the throttle position sensor and the IAC valve. That leads me to believe that the coolant temp sensor should be in the same general area. That's fine, there is a spot in the intake I can use (though installed the sensor on the other side). The problem is, the sensor I have that I thought was the temperature sensor is not the right one for the connector. See picture below. This leads me to two questions: what is the sensor I have for and what is the proper part number for the temperature sensor I need?

2) The new wiring harness has one distributor connector. I installed the Holley Stealth Ram intake on mine and used the small cap HEI distributor and remote coil. However, the distributor has a place for another connector and the coil has a spot for two connectors. See pictures. Not sure if I bought the wrong coil/distributor or if I'm missing some wires or what.

3) I bought the knock sensor that the wire harness provider recommended (I got it from Napa, DEM AS10014) but it does not fit in the knock sensor connector. This knock sensor is for a 1990 Camaro with a 5.7L motor. Does anybody know the correct part number of the knock sensor I need?

4) Finally, my old upper intake had a sensor screwed into the bottom of it. I put this same sensor in the new intake, but there isn't a wire for it. I do have a wire for a air temperature sensor, but I believe that the air temp sensor is screwed into the back of the intake. The HSR instructions say something about a remote IAC or something like that, not sure if this is needed or not.

Thanks for any advice you can provide.
Attached Thumbnails Four wiring/sensor questions-temp-sensor.jpg   Four wiring/sensor questions-distributor.jpg   Four wiring/sensor questions-coil-connector.jpg  
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Old Aug 11, 2012 | 11:21 PM
  #2  
vetteoz's Avatar
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From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Four wiring/sensor questions

Originally Posted by Fronzizzle
1) The problem is, the sensor I have that I thought was the temperature sensor is not the right one for the connector. See picture below. This leads me to two questions: what is the sensor I have for and what is the proper part number for the temperature sensor I need?
Unit you have is the cold start switch ; not used on a HSR
You need a CTS;
http://tpiparts.net/inc/sdetail/10956/497
$14 from your local parts shop
Same sensor used for TPI/TBI CTS as well as the IAT


Originally Posted by Fronzizzle
2) The new wiring harness has one distributor connector. I used the small cap HEI distributor and remote coil. However, the distributor has a place for another connector and the coil has a spot for two connectors.
Harness has 4 wire plug for dist
You need the 2 wire (pink / white wires ) connector from dist to coil.Your harness should also have a pink wire (Ign ) with a connector to plug into other side of the twin post coil
Raid the junkyard; same setup used on TBI trucks

Originally Posted by Fronzizzle
3) I bought the knock sensor but it does not fit in the knock sensor connector. This knock sensor is for a 1990 Camaro with a 5.7L motor. Does anybody know the correct part number of the knock sensor I need?
Wrong part maybe; all KS have the same connector
Looks like this
http://tpiparts.net/inc/sdetail/10962/771

Originally Posted by Fronzizzle
4) I do have a wire for a air temperature sensor, but I believe that the air temp sensor is screwed into the back of the intake.
You can put the IAT sender anywhere in plenum ; in the rear or in the threaded port under the plenum on the HSR.
If you have the IAT mounted at rear , then should be able to pull the IAT wire out of the harness back to the rear of intake so it fits
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