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Jeep Wrangler YJ
YJ General Discussion
TPS setting
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<blockquote data-quote="deadpool1" data-source="post: 439498" data-attributes="member: 21229"><p>watch out for the warnings on ISA, when remove (ISA and unplugged IAC) the ISA it says has no spring inside it, and confuses folks</p><p>And to never force extened the plunger, key off and disconnected due to it not having limits stops and the end of travel and forcing it wrecks it.</p><p>one fussy best that ISA> no wonder they dumped it. for MPI. fast.</p><p></p><p>as you can see now the ISA the way it works keyon, , the TPS cannot be calibrated for idle position, due to that varies keyon,. so it is only done at</p><p> TPS WOT out is<strong> 93% of what B>C reads.</strong></p><p>most TBI cars on earth TPS set at idle ,but not the bugger.</p><p>the lie in chiltons is there is no 5vdc on all TBI, only 1 in 10 cars will it be at 5v, <strong> 4.5 to 5.5v</strong> all cars. (this model) ( 0.1v resolution)</p><p>sure we can use 5.0v as and example sure. and i did below.</p><p>chiltons. defeats the end results to dead wrong, due to their error.</p><p>they forgot to read the FSM FUELing chapter preamble, it states that clearly. (same power source to MAP too.) <<< yes easy to miss, sure.</p><p></p><p></p><p>the output test is done only WOT< so 2.5v is wrong. key on,. only and not running.</p><p>correct is (5.v ) input , wot output is 4.65 (93%) times 5 is that.</p><p>the trick is yes strange. due to TPS calibrated at WOT. only, KOEO.</p><p></p><p>the other 2 possible problems are</p><p>1: the wot switch dead.</p><p>2 the ISA idle switch failing. inis</p><p></p><p>yes, keep in mind key on engine off (KOEO) the PCM sends data (motor control) to the ISA, to intelligently set cranking up idle air supplies, for the start.</p><p>that is why calibration can not be done using idle. (it is always in-determinant) so is done Chilton step 7 above (dont skip comment there)</p><p>the air it send even varies greatly for cold starts. or super cold start ups, using ECT data. TEMPs</p><p>or hot starts,small air sent. greatly less hot is the key word.</p></blockquote><p></p>
[QUOTE="deadpool1, post: 439498, member: 21229"] watch out for the warnings on ISA, when remove (ISA and unplugged IAC) the ISA it says has no spring inside it, and confuses folks And to never force extened the plunger, key off and disconnected due to it not having limits stops and the end of travel and forcing it wrecks it. one fussy best that ISA> no wonder they dumped it. for MPI. fast. as you can see now the ISA the way it works keyon, , the TPS cannot be calibrated for idle position, due to that varies keyon,. so it is only done at TPS WOT out is[B] 93% of what B>C reads.[/B] most TBI cars on earth TPS set at idle ,but not the bugger. the lie in chiltons is there is no 5vdc on all TBI, only 1 in 10 cars will it be at 5v, [B] 4.5 to 5.5v[/B] all cars. (this model) ( 0.1v resolution) sure we can use 5.0v as and example sure. and i did below. chiltons. defeats the end results to dead wrong, due to their error. they forgot to read the FSM FUELing chapter preamble, it states that clearly. (same power source to MAP too.) <<< yes easy to miss, sure. the output test is done only WOT< so 2.5v is wrong. key on,. only and not running. correct is (5.v ) input , wot output is 4.65 (93%) times 5 is that. the trick is yes strange. due to TPS calibrated at WOT. only, KOEO. the other 2 possible problems are 1: the wot switch dead. 2 the ISA idle switch failing. inis yes, keep in mind key on engine off (KOEO) the PCM sends data (motor control) to the ISA, to intelligently set cranking up idle air supplies, for the start. that is why calibration can not be done using idle. (it is always in-determinant) so is done Chilton step 7 above (dont skip comment there) the air it send even varies greatly for cold starts. or super cold start ups, using ECT data. TEMPs or hot starts,small air sent. greatly less hot is the key word. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
TPS setting
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