q45 on stock ecu?
I found this concerning the wiring...not sure if it will help or hinder:
Originally Posted by Some Nissan board
The Nissan TPS uses two 3 wire connectors on it. One is on a short section of harness about 6 inches long and handles the actual throttle position signal and the other made to the body of the sensor is for the idle validation circuit which you also need or you get a code (51 I believe). With the sensor standing up, with the mounting tabs on the right side and the TPS wiring harness coming out of the bottom while your looking at it the top 2 pins in the connector made in the sensor body are your idle validation pins so disregard the bottom pin. Your TPS wiring harness that comes from the bottom of the sensor will terminate at a 3 prong plug and have red, white, and black wires in it. The wires colors correspond with these functions:
Red is the 5 volt input wire
White is the TPS signal wire
Black is the sensor return wire
Red is the 5 volt input wire
White is the TPS signal wire
Black is the sensor return wire
Why are you going to run it??? Does your car make 1000hp? If you feel the need for a bigger TB why not just get the stocker ported or buy a 65mm one instead of going a route which not many people do. Btw did you get an evo?
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Airflow is power young skywalker. Blowing 30psi through a straw or 30 throw a piece of pipe still has the same percentage gained as 55psi through a straw or through a piece of pipe.
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the q45 tb is actually a pretty common throttle body to use on higher hp 4g63s.
Oh I know it makes power but is he running 30psi? My comment was based off him saying pauls car runs it. Well thats not very practical comparison. How much power does he make or is he even referring about an evo?
Last edited by dbsears; Mar 6, 2008 at 10:32 PM.
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I made reference to pauls car as an example and yes i am referring to a q45 on an evo, if i wasn't pointing it in the ecuflash forum would be kind of pointless
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They have been using these on DSM's for a long time. You need to calibrate the TPS sensor to the same ohlm reading as your stock TPS sensor. You need a multimeter to read ohlms, read the stock TPS sensor closed for your 0 reading, read WOT for 100% write it all down. Take the Q45 and calibrate the TPS sensor the same make sure it has enough sweep to match the stock TPS readings. The important number is the stock TPS 0 setting you want the ECU to see the same ohms it seen with the stock throttle body. The ICS Valve is the problem, without it you might have some idle issues. I was planning on doing something like this to. You may have to disable the ICSV in the ECU or your going to get a P0506 code. I don't know if this is what you were looking for hope it helps. I'm going to try this in a couple of months. I've been going through some of the DSM forums getting ideas.
The ECU doesnt care what size the throttle body is because it measures airflow at the MAS. You can run whatever you want the only problem would be to trick the ISC Valve, or find a way to disable it in the ECU. It can be done most people just bore the stocker or use the BBK's.