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HELP<What are the two sensors on the T.B.?

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Old Jul 31, 2007 | 10:35 PM
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Default HELP<What are the two sensors on the T.B.?

What are the 2 sensors located on the driver side of my throttle body on my 02 ws6. Ones on top, the other under it. Also, can I adjust my idle down @ 300 rpms by turning the throttle set screw adjustment? Thanks for the help.
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Old Jul 31, 2007 | 10:45 PM
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top one is the Idle Air Control (IAC) bottom is Throttle Position Sensor (TPS)

don't think it will run at 300 rpms. at 500 rpms, mine gets very surgy.
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Old Jul 31, 2007 | 10:46 PM
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No you cant change the idle with the setscrew. Idle rpm is set in the pcm.
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Old Jul 31, 2007 | 10:51 PM
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why the **** would u want a 300rpm idle? id be suprised if ur engine liked anything below 650. thats what stock is and urs probably needs higher.
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Old Jul 31, 2007 | 10:58 PM
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Actually, stock in an M6 would've been 800 rpms.
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Old Jul 31, 2007 | 11:46 PM
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Originally Posted by Phoenix 5.7
why the **** would u want a 300rpm idle? id be suprised if ur engine liked anything below 650. thats what stock is and urs probably needs higher.
You can run lower than that easily (maybe 520 min) but what about your alternator? Hope you like low voltage.

Think old Mad Max used to do that to squeeze out every drop he could.
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Old Jul 31, 2007 | 11:55 PM
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Originally Posted by stepuptata
What are the 2 sensors located on the driver side of my throttle body on my 02 ws6. Ones on top, the other under it. Also, can I adjust my idle down @ 300 rpms by turning the throttle set screw adjustment? Thanks for the help.
man you want your cake and icecream too dont ya?

why? most people want a higher idle....lol
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Old Aug 1, 2007 | 12:26 AM
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yes, if the throttle blade is set open right now, but you would have to physically look inside there.
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Old Aug 1, 2007 | 01:08 AM
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Originally Posted by boondiggys
yes, if the throttle blade is set open right now, but you would have to physically look inside there.
Any change to the throttle blade will just be overridden by the iac valve as the pcm tries to regain control of the engine speed.
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Old Aug 1, 2007 | 01:29 AM
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will the engine run without the iac valve?
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Old Aug 1, 2007 | 01:36 AM
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If you removed the IAC motor the engine would climb up in RPM really high because so much air is shooting through the TB. You would have to try and figure out how much of it to close off with epoxy. I guess you could do it since these cars have adaptive spark and short term fuel correction. Would be WAY not worth the frusteration in my opinion.
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Old Aug 1, 2007 | 03:36 PM
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Sorry about the confusion guys. I meant I need to lower my idle too 800. It currently idles @ 1100-1200 rpms. Also, the blade is cracked open slightly, but I figure thats normal. I'm looking for a quick and easy fix for the idle problem. But more than likely I'll have too have it re-tuned. Could my I.A.C be bad? What happens if that goes bad. Thanks for the help and suggestions!
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Old Aug 1, 2007 | 03:57 PM
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ur blade could be misadjusted. try playin with the idle set screw if its idiling that high. 300 is a big differnce from 800.
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Old Aug 1, 2007 | 09:29 PM
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adjusted blade, didn't work. Made car have crappy throttle response. I'll have it tuned.
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