Frog98

Had my 5,000 mile service today. I haven't had any issues, but I asked about the ECU update. They said they would not recommend doing anything unless I was having an issue and they can reproduce it.

ISF001

Find another dealership for the service. Lexus should provide the ECU update to ALL RC Fs. It enhances performance.

wordsworth

That's akin to a doctor telling you to keep on smoking until it starts bothering you.

Ne1tHeRe

iTrader: (3)

At lexus for 5k service...asked for fuel pump ecu update. Gave them the TSIB#. Big thanks for the provided info and pic I was hearing some hum...hope they can hear it over the new exhaust...haha. Will keep you posted.

Ne1tHeRe

iTrader: (3)

Got the TSIB done. No real noticeable difference with performance/idling but will test some more.

ROK

Or hey doc, I don't have cancer yet, but can you do a light round of chemo so I can be proactive about a disease I don't yet have or will ever have?

If it ain't broke, don't fix it. Thanks, pal.

Ne1tHeRe

iTrader: (3)

I know people were about the hesitation being fixed after the update. I still have it.

Aside from that, still need to do some more testing/driving.

JB5674

I got my "fix" when I went in for 15k services.....

I notice the car is smoother with is powerband, the "lag" is gone, and the bouncy idle is gone too. I added my exhaust about a month or so prior to the fix. I know the car learns and I drive hard. Yet, after the new ECU reflash, things just smoothed out.

Carnevino

Hey guys! I've combed through the thread and couldn't find the TSB number...could one of you please repost it so I can contact my dealer. Never had a noise/pump issue, but the lag is definitely present. My work has had me slammed the past few months so I haven't been able to follow the forums like I wish I could. Thank you.

JT2MA71

iTrader: (7)

Publication_Number: 'L-SB-0031-16'.

Vehicle Applicability: ''15-'16 RC F, 16' GS F'.

T3_ID: '16-TMS-0039-L'. Publication_Number: 'L-SB-0031-16'.

JT2MA71

iTrader: (7)

Not feeding the TROLL or anything, this is not about cancer. This is about a fuel pump not liking to be ran at certain low duty cycle/voltage/frequency. Our pumps are most likely PWM controlled to prolong service life, but somehow, the setting was low enough that some of them start to hum after they're put into service.

Carnevino

Thanks JT!

rjmalm

Yes I did get the ECU update yesterday and will keep thread updated. see post #390 for some details and audio recordings.

corradoMR2

Thanks for the update. Putting aside volume differences, I can't reliably decipher differences in sound before and after the ECU update from the .wav files you attached. Mine here almost sounds like your before state, but my dealer said this sound is normal.

BTW, for Canadian owners, my Service Manager said the TSB is not yet available for Canada but is aware it's out in the US and will likely be out soon for us.

rjmalm

When the noise starts, owners that have the problem will know it. It is clearly heard from in the car (driver or passenger hear it) and outside near the rear tires (louder at front of rear tire). You might try listening to the wav files with headphones, when I play it with my PC speakers it is more muted vs the headphones. I am going to edit and replace the wav files and try to get the volume level the same so try again at this post #390 . The recordings were done in different locations on my road trip so background noise is different.
I can here it in the recording but I know what to listen for. After driving 1000s of miles with it coming and going you know what to listen for. Its irritating. I am glad it has stopped with this high air temp and/or the ECU update