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RPM drop at stop

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Old Feb 6, 2019 | 07:57 AM
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Default RPM drop at stop

I have a new problem my 05 Z51 when I come to a stop the RPMs will drop to 3-500 then returns to 700. Feels like is going to stall but does not. Is this the MAF sensor or what?
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Old Feb 6, 2019 | 12:03 PM
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Sounds likes maybe a dirty throttle body...you can look at that first....might as well give the MAF sensor a cleaning while your there !!
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Old Feb 7, 2019 | 02:42 PM
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My 05 GTO with the LS2 did the same thing, my buddy had an extra throttle body in his garage and we swapped it out and fixed the issue. We didn't try cleaning it but like C5 Diag said I would start there.
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Old Feb 7, 2019 | 03:26 PM
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I have the same problem on hot days mainly, when slowing down with foot off throttle.

It occasionally stalls while taking a corner which is scary because power steering stops.

What is there to clean in the throttle body?

Its an 08 Z06.
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Old Feb 7, 2019 | 04:18 PM
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Originally Posted by cdngolfer
I have the same problem on hot days mainly, when slowing down with foot off throttle.

It occasionally stalls while taking a corner which is scary because power steering stops.

What is there to clean in the throttle body?

Its an 08 Z06.
Great videos !!...just get some TB Cleaner...with the key on keep gas pedal down like in the video and clean away with an old toothbrush !!


Last edited by C5 Diag; Feb 7, 2019 at 04:29 PM.
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Old Feb 7, 2019 | 04:23 PM
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Terrific

thanks!
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Old Feb 7, 2019 | 05:19 PM
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Super !!...keep us advised of the outcome !!
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Old Feb 9, 2019 | 08:32 AM
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That might take until June when it gets warm enough in Toronto to see the difference......damn!
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