First thing to do is to loosen the nut and set screw circled here. Back the screw out all the way until the Butterfly Valve is resting on the Bore of the TB.
Now, slowly tighten down the set screw until you see the butterfly valve opening. The idea here is to get the butterfly valve as closed as possible while keeping it from hitting or rubbing against the walls of the Bore. If the butterfly valve rubs against the bore.. it will wear it out fairly quickly and you dont want to have to buy one of these things new from mazda. Once you have the set screw in position to keep the butterfly valve closed but not touching the bore, tighten down the nut to keep the set screw locked in place.
Now we are going to move on to adjusting your TPS.. aka your Throttle Position Sensor. This is where you will need the Feeler gauge and a multimeter. Check out this next image. Note the position of the tabs circled in red so you can make sure you are viewing your TPS at the same angle. Note the 2 pins circled in yellow and labled A & B respectively.
Now test for continuity between pins A & B. You should have continuity at this point. But if you dont, dont panic. If you adjusted your butterfly valve as shown above, this will be normal. Insert the feeler marked 0.3mm (or 0.012in) (see image below), then loosen up the 2 screws holding your TPS sensor in place and turn it (use very small increments) slightly, checking continuity frequently, until you register continuity again.
Now insert the feeler marked 0.4mm (or 0.016in) as shown below.
You should have no continuity between pins A & B, with the feeler in place.
So to recap.. You should have continuity between pins A & B with no feeler inserted and with a 0.3mm (0.012in) feeler inserted. You should have NO continuity between A & B when you have a 0.4mm (0.016in) feeler inserted. If the above is true. Tighten the screws for the TPS down, tighten them down evenly, a little bit on one screw and then switch to the other one.. back and forth till both are tight. Be very careful doing this, if you tighten too much.. you will throw your adjustment off and you will need to redo it all over again. Once you have tightened the screws down completely.. check for continuity again just as you did before you tightened it down.. to make sure your adjustment stayed true.
And thats it folks.. you should of course replace the gasket that goes between the TB and the Intake. But you are now ready to reinstall your TB.
*Edit* Just one additional note - You will need to readjust your idle speed after you reinstall your TB. This is pretty easy to do though. Just place a jumper wire between TEN & GND on the diagnostic box and then tighten or loosen the IAA screw until your idle speed is around 750-800 RPMs. Then shut down and remove the jumper wire. You will need to allow your engine to reach normal operating temp before making the final adjustment.
Hope this helps and happy zoomin
Tunes67
). I know I have asked about this many times but I want to make sure I completely understand what I'm doing so I don't just make it worse.
Simple Kudos, that's all.
