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how to reprogram a throttle body for a 2002 chevy trailblazer


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don46970
New User

Dec 28, 2012, 7:50 AM

Post #1 of 6 (10553 views)
how to reprogram a throttle body for a 2002 chevy trailblazer Sign In

 
We have a 2002 Chevy Trailblazer. We are trying to figure out how to reprogram throttle body. We have already cleaned it. Also the idle is low and when we drive it and slow down we have no power steering, could that be caused by the throttle body not turning the power steering pump?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 28, 2012, 7:56 AM

Post #2 of 6 (10546 views)
Re: how to reprogram a throttle body for a 2002 chevy trailblazer Sign In

Throttle bodies are not programmable. The PCM can relearn idle strategy or a tech with a factory scan too scan perform an idle relearn procedure to the PCM.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



don46970
New User

Dec 28, 2012, 8:05 AM

Post #3 of 6 (10529 views)
Re: how to reprogram a throttle body for a 2002 chevy trailblazer Sign In

What about the power steering issue? Could that be related to the throttle body?


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Dec 28, 2012, 8:15 AM

Post #4 of 6 (10524 views)
Re: how to reprogram a throttle body for a 2002 chevy trailblazer Sign In

PS is a load on the engine that needs to learn how to cover with appropriate idle speed. Not checking now but many will sense high pressure in PS hose which in turn tells the PCM what to do to cover it,

T


Hammer Time
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Hammer Time profile image

Dec 28, 2012, 8:21 AM

Post #5 of 6 (10513 views)
Re: how to reprogram a throttle body for a 2002 chevy trailblazer Sign In

The engine has to be turning fast enough to run the pump.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Dec 28, 2012, 9:46 AM

Post #6 of 6 (10491 views)
Re: how to reprogram a throttle body for a 2002 chevy trailblazer Sign In

You can disconnect and reconnect the battery to reset throttle adaptation on that one. Are there any trouble codes in the PCM? Reduced power message showing up in the DIC?

When you cleaned the throttle body how did the throttle plate feel when you opened it by hand? It should open smoothly without any binding. When the throttle closes it should spring back to a semi open position with no power to the throttle body motor.





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