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slight shutter/rpm jump when slowing down.

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Old 01-05-2012, 12:51 AM
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Default slight shutter/rpm jump when slowing down.

Sometimes I will hit the brake and when I'm almost at stop, the rpms will jump between 400 and about 900 rpm. I also feel a mild vibration. I highly doubt its the brakes because it only does this at low rpms. Any ideas what this can be? Thanks.
Old 01-05-2012, 09:16 AM
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Transmission downshifting?
Old 01-05-2012, 09:55 AM
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Is it the stutter from DOD/AFM. My car always used to do that.
Old 01-05-2012, 11:46 AM
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Not sure if its the dod or not. Does that dod also cause it to"tick" sometimes on a cold start?
Old 01-05-2012, 01:14 PM
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yeah, sounds like the DOD issue...

easy way to tell.. drive your car in 3 instead of D, so that the DOD doesn't activate, and then see if it still has that issue...
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Old 01-05-2012, 01:56 PM
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Originally Posted by SSWHITE07
Not sure if its the dod or not. Does that dod also cause it to"tick" sometimes on a cold start?
The tick is typical of all LS motors. I believe it is piston slap...? Otherwise you are hearing the injectors.
Old 01-05-2012, 08:32 PM
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lifter tick.
Old 01-05-2012, 08:47 PM
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Our cars weren't afflicted with the dreaded piston slap, but we do have lifters ticking.

I had a 2000 Z28 with the "slap" and it sounded like a diesel truck when you went through the drive-through or were next to a wall.



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