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Oct 23, 2009, 11:14 PM
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#1
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Evolving Member
Personal Sales Rating: ( 6)
Join Date: Mar 2006
Location: Fresno, CA
Posts: 188
Drives: '06 MR/'95 Civic DX coupe
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EvoScan: 0% throttle = 13.73???
is this normal? when i'm at 0% throttle (decel, etc), my log shows 13.73. does this mean my TPS is not calibrated right or is it normal?
i show 100% when i'm actually at 100%... but if it's calibration is off... then it's gonna show 100% when i'm NOT.
i have no way to drive and watch the log.. nor do i have anyone to go with me while i tune, otherwise i'd know that way.
so. thought i'd ask. anyone?
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Oct 23, 2009, 11:36 PM
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#2
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Location: Cali
Posts: 44
Drives: 03 Porsche 911 C2, 2004 F150, 2003 Evo
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thats normal. You could go and adjust the tps sensor and try and get a couple more degrees out of it but really its not gonna much a difference,
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Oct 24, 2009, 04:33 AM
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#3
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Drives: 2004 EVO VIII
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If the TB is at 0 when you let the gass the car will shut down. You need some air (and fuel) for the car to idle.
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Oct 24, 2009, 07:01 AM
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#4
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Evolving Member
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Location: Coatesville PA
Posts: 147
Drives: Rally Red Evolution VIII
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As long as it displays 100% when the peddle is fully depressed, it's within it's operation envelope. The actual position at idle fluctuates between cars in my experience. Mine reads 15.2% or something like that at idle.
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Oct 24, 2009, 11:01 AM
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#5
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Location: W. Warwick, Rhode Island
Posts: 2,998
Drives: '03 evo VIII BBY(sold!), '95 Talon ESI-Turbo'd, '90 Mirage 4g63
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Quote:
Originally Posted by racer135
If the TB is at 0 when you let the gass the car will shut down. You need some air (and fuel) for the car to idle.
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VERY wrong. The throttle plate should ALWAYS close fully when you let go of it. Its the Idle Air Control valve that regulates the amount of air that gets inside the engine when the throttle plate is closed. The ECU has NO CONTROL over the throttle plates position, its 100% mechanical.
To the OP, its within normal range but you CAN adjust the TPS sensors position so you get the full 0-to-100% swing.
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Oct 24, 2009, 11:13 AM
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#6
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Location: I'm Canadian living and working in Dubai/Kuwait/Bahrain
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Drives: 08 Yamaha R1/06 Evo IX/99Yamaha R1
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Mine's the same, a buddy of mine who tunes Hondas says it wasn't normal or at least it's not like that on the Honduhs so i searched and it's normal.
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Oct 24, 2009, 11:59 AM
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#7
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Drives: 05 Evo VIII, 02 Dodge Stratus, 73 VW Karmann Ghia
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Quote:
Originally Posted by Jack_of_Trades
To the OP, its within normal range but you CAN adjust the TPS sensors position so you get the full 0-to-100% swing.
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Care to elaborate on how to do this? I have adjusted my TPS several times after Throttle body swaps and never have I been able to get the full swing from 0-100% I'm not saying it can't be done, I would like to know how. I've always thought that you adjust the TPS so that it just shows 100% when holding the throttle wide open and verifying that the throttle plate is actually all the way open. After doing this it always comes down to a 13.5x% for me.
Josh
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Oct 24, 2009, 12:09 PM
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#8
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Proper adjustment (factory) is 13.33% but I have seen as high as 14.0%. 13.5% sounds about right, the main thing is getting it in the goldilocks zone.
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Oct 24, 2009, 12:11 PM
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#9
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Location: New Jersey
Posts: 5,178
Drives: 03 Evolution 8
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Quote:
Originally Posted by JohnBradley
Proper adjustment (factory) is 13.33% but I have seen as high as 14.0%. 13.5% sounds about right, the main thing is getting it in the goldilocks zone.
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what about us aftermarket TB guys. like the hypertune. the lowest i can get mine is 15.65 same with a few other guys i know who use this tb. i do get a 15.65 to 100% though.
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