Sounds like..

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Sep 13, 2015 | 04:39 AM

2013is250

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Driver School Candidate

Joined: Sep 2015

Posts: 1

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From: Nc

Sounds like..

I have a 2013 IS 250. Recently at speeds of 70 or more I hear what sounds like a spark knock- it is reminiscent of sounds from my Dad old car and he always said it was cheap gas. I always burn 93 octane- I have taken it to my dealer but was told they can't hear anything. However they said they can't accelerate to those speeds due to traffic laws and liability. No warning lights are on when this occurs and the dealer said no codes and the engine checks out fine.. But this is driving me crazy..thanks in advance.

Sep 13, 2015 | 07:09 AM

SoulFreak

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Joined: Jul 2011

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From: Florida

You posted this in the wrong section... But ask your dealership to request for a technician ride along. This way both of you are in the vehcile and you can point it out as you drive.