rough idle *without* rpm's dropping? Huh???
#1
Lexus Test Driver
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rough idle *without* rpm's dropping? Huh???
<2008 IS250, a/t, 23k miles, all service done>
Today I was stopped at a left turn arrow when my car started shaking for about five seconds. This was different from the carbon build-up shake when the rpm's dip and pop back up only for a second's time. Once the shaking started, I looked at the tach and there was no movement from the normal idle at all. It lasted about five seconds, which was longer than the past times when the rpm's momentarily dropped and bounced up (I'm pretty sure I do have a prior carbon build-up issue). No warning lights appeared either. So was this another form of the carbon build-up infliction, or something new?
Today I was stopped at a left turn arrow when my car started shaking for about five seconds. This was different from the carbon build-up shake when the rpm's dip and pop back up only for a second's time. Once the shaking started, I looked at the tach and there was no movement from the normal idle at all. It lasted about five seconds, which was longer than the past times when the rpm's momentarily dropped and bounced up (I'm pretty sure I do have a prior carbon build-up issue). No warning lights appeared either. So was this another form of the carbon build-up infliction, or something new?
#2
Lexus Fanatic
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I had a similar thing happen to me, I was pulling out of a parking spot, came to a stop just a bit after and the car began shaking for a few seconds. No lights, No RPM movement... just shaking. I've been having the Carbon Build up shake with the RPM dipping and everything, so I just chalk it up to that...even though the RPM's didn't dip that time. Having the TSIB performed in a week so lets see if it happens again...
#3
Lexus Test Driver
Thread Starter
I had a similar thing happen to me, I was pulling out of a parking spot, came to a stop just a bit after and the car began shaking for a few seconds. No lights, No RPM movement... just shaking. I've been having the Carbon Build up shake with the RPM dipping and everything, so I just chalk it up to that...even though the RPM's didn't dip that time. Having the TSIB performed in a week so lets see if it happens again...
#5
Lexus Test Driver
Thread Starter
I think they said they cleaned something out about two years ago. Since then, they just say they haven't been able to reproduce it. Mind you, it usually only happens once every few months, but lately it's been once a month.
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