Pete EP82 Posted June 6, 2015 Share Posted June 6, 2015 Hi Guys,Some time ago i bought a Power FC, It's only now that were getting around to fitting and mapping the unit. We are running into an issue with the throttle position sensor. The sensor is showing 1.2volts on the hand commander and will not change from 1.2volts regardless of throttle position (opening or closing throttle). You'd imagine the sensor is buggered but we changed the sensor and are still have the same issue. Wiring going to the sensor appears to be fine also. Has anyone encountered a problem like this before? Any help greatly appreciated!! Pete Quote Link to post Share on other sites
jellybaby Posted June 6, 2015 Share Posted June 6, 2015 Is it a manual Tb or a auto one ? As manual just on or off Quote Link to post Share on other sites
Pete EP82 Posted June 7, 2015 Author Share Posted June 7, 2015 Manual TPS mate... Quote Link to post Share on other sites
karl. Posted June 7, 2015 Share Posted June 7, 2015 The wiring must be shorting out somewhere and it's getting constant power from something? Quote Link to post Share on other sites
tommyep82 Posted June 7, 2015 Share Posted June 7, 2015 The ep82 tps is just an on off signal Quote Link to post Share on other sites
Stu Posted June 10, 2015 Share Posted June 10, 2015 As above, you need a variable tps unit not the switch type standard one. Quote Link to post Share on other sites
TrisK Posted June 10, 2015 Share Posted June 10, 2015 As above, you need a variable tps unit not the switch type standard one.This is not true. The PowerFc is designed to work with the standard TPS Quote Link to post Share on other sites
mattyD Posted June 10, 2015 Share Posted June 10, 2015 But by standard do you mean standard manual or standard auto? The standard manual is just an on off switch where as the standard auto is variable and makes life a lot easier when trying to fund the correct throttle position Quote Link to post Share on other sites
Stu Posted June 10, 2015 Share Posted June 10, 2015 (edited) Trisk, yes to a degree you are correct and it will run and I probably should have elaborated. With a variable unit you have better tunability for instances where there are low vac signals ie transitioning between vac and positive pressure. For example, in a NA application (yes I know this might not be the case here) when there is low vac it can be very difficult to tune effectively using map alone. This can depend on the ecu and its rpm/load resolution - Its been so long since Ive used an FC but I don't recall the load zones being able to be adjusted. Another example is for engines with quad throttles or cams with big overlap where the engine may operate at with low map readings across quite a range of rpm/load, and this is where the TPS is used. In more modern ecus with selectable tuning modes, Alpha-N (TPS loading) or mixed mode tuning (map and tps) can give much much better tunabilty. The FC is an old unit now and from memory doesn't have this capability. Edited June 10, 2015 by Stu Quote Link to post Share on other sites
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