jono Posted December 28, 2017 Share Posted December 28, 2017 Is the signal out of the ea82 spfi expressed in Volts or is it a simple tpswitch like version 1 of ea82 mpfi idle switch and about half throttle? Quote Link to comment Share on other sites More sharing options...
DaveT Posted December 28, 2017 Share Posted December 28, 2017 There is a pot and a switch on the throttle. The switch is for zero throttle / idle. The pot is for the ecu to know how hard you are on the gas. 1 Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted December 28, 2017 Share Posted December 28, 2017 5v signal from ECU is fed through a potentiometer and is then read by the ECU as a throttle position based on the voltage output of the pot. It also includes an idle switch to tell the ECU that the throttle is closed. GD 1 Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted December 28, 2017 Share Posted December 28, 2017 Also: "when people suggest an EJ conversion, my date puckers * up at the way higher price of an EJ clutch over EA" Non sequitur. Your facts are uncoordinated. EJ swaps use the EA clutch kit. GD Quote Link to comment Share on other sites More sharing options...
jono Posted December 28, 2017 Author Share Posted December 28, 2017 (edited) Also: "when people suggest an EJ conversion, my date puckers * up at the way higher price of an EJ clutch over EA" Non sequitur. Your facts are uncoordinated. EJ swaps use the EA clutch kit. GD point taken - I always think of EJ conversion goes hand in hand with the AWD box they come with for the added benefit of AWD. Man EJ power just in FWD - poor old EA boxes must get a hiding ! OK thanks , was thinking that because spfi is three pin TPS it must be same as series 1 flapper ECU 3 pin TPS ( which is really two switch points) as a change occured with four plug ecu hot wire afm - the tPS became four wire which i guess is a switch point for idle, then a progressive pot for the off idle to flat out open. Next question will be - of the three pins which is which? I need to use a TPS to feed the variable Voltage to a new fuel management device that asks for 0.5 to 4.5 Volts. It is a Peel Instruments Lean Bias Logic enrichment controller for a propane system. Aussie ingenuity on reliable old US Impco fogger system One pin must be earth neg (-) a second pin must be pos (+) 5V in from a new power source - no ECU on board third pin must be output pos (+) 0.5 - 4.5 or 5V OK, idle switch may not be an accurate term to use then ? Must be one end of the read out scale 0.0 to 5V somewhere ? Edited December 28, 2017 by jono Quote Link to comment Share on other sites More sharing options...
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