[V8] TPS? - Injector Seals

[Scott Simmons]

It occurred to me that throttle position and 2,000rpm are independent 
things.  You can have 2k at 5% throttle or 25% throttle.  I think we're 
looking in the wrong area....

~Scott

Buchholz, Steven wrote:

>... the TPS potentiometer is fed to the tranny CU on the automatic cars ... but the ECU could care less ... as noted it only sees the idle and WOT switches.  You might want to see if the WOT switch is activating in the area you're seeing the flat spot.  I would not expect it to kick in until much higher revs ...
>
>Steve B
>San José, CA (USA)
>  
>
>>Is the TPS on this vehicle nothing more than a WOT switch?  Or is it a
>>fully functional sensor (i.e. it has variable resistance based on
>>throttle position)?
>>
>>~Scott Simmons
>>
>>Ed Kellock wrote:
>>
>>    
>>
>>>The TPS is just below the ISV right up front.
>>>
>>>Unplug your OXS and see if the 2k rpm flat spot goes away.
>>>
>>>I ran with my TPS unplugged for some reason once and the throttle was hair
>>>trigger at the point where the throttle just opened/closed.  After that
>>>position, there was not unevenness.
>>>
>>>Ed
>>>      
>>>
>>>>-- TPS?
>>>>
>>>>I have a deadspot in my throttle just above 2000 rpm.  It
>>>>will fluctuate the rpms while continuing to depress the
>>>>pedal.  Then it will resume to normal rpm / throttle position
>>>>ratio at about 2300.  When the car is in this "dead" position
>>>>it will buck violently.  If I press pedal quickly I can
>>>>"overshoot" this dead spot.  It make for interesting driving
>>>>experience.
>>>>
>>>>Is this a Throttle Position Sensor?  Where is it located and
>>>>is it a costly part?
>>>>
>>>>Please advice that to do?
>>>>
>>>>-- Injector Seals
>>>>
>>>>I replaced the Injector Seals (all 16).  I was amazed at the
>>>>loose fitting injectors in the intake.  There was a large
>>>>amount of goo in and around the injector opening in the
>>>>manifold.  This drastically improved the Idle and the
>>>>perfromance from the engine.  I wish i had done this years
>>>>ago.  The seals were no longer elastic, and I'm sure it was a
>>>>vacuum leak.  Guys spend the $16 and replace these seals.
>>>>        
>>>>
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