DavidL

Has anyone here experience the fuel pump issue being discussed in the RCF forum? I believe I have the issue and will be heading to the dealer next week.

Here's the thread and TSIB information

https://www.clublexus.com/forums/rc-...ml#post9610511

https://www.clublexus.com/forums/rc-...ml#post9610338

https://www.clublexus.com/forums/rc-...ml#post9580358

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'.

IsfClyde

Yea I had the reflash done at about 250 miles

trilogy069

I had mine done also about a month ago.

GSF4RL

Were you having trouble and if so what? Did you notice any difference in performance? I haven't noticed any issues with my GSF but I've only driven about 150 miles so far.

CobraGSF

iTrader: (2)

Thanks for this.. I'm taking delivery soon. Would the dealer do this prior to ownership? or would i have to drive the car and prove theres an issue

Logic83

What exactly is the issue to look out for to know its bad? Ive been daily driving my 16 GSF since August (3k miles).

IsfClyde

There was a hissing noise when quiet in the car. Like the fuel pump is sucking air. The tsb reflash increases fuel flow but not enough for any performance gains.

lobuxracer

iTrader: (2)

It only gets done if you complain about it. If you don't, nothing happens. This is not a recall or even an update. It's just a service bulletin to save the techs time if the customer complains about a noise. We have about 1400 miles on the car. No noticeable noise.

Rrgirgis

I didnt really hear the noise on mine but from all the RCF owners saying how much better the car felt after the reflash, i had my dealer update mine.

I can agree with the other guys that the car seems to be smoother, as if it knows what gears its supposed to be in now and the power feels more linear as appose to shifting and trying to find the right gear... I only drove it back so not much time with the re flash but it seems much better with it done

McP

Had it done at the 5000 mile service, at first lexus could not find anything on the GS-F, I told them to check the RC-F and sure enough it mentioned the GS-F in their RC-F bulletin

danlittle

Mine started making a strange whirring sound from the back seat. Passengers would notice and ask what was the noise. The flash made it stop.

lobuxracer

iTrader: (2)

I have noticed no difference at all in anything after the reflash when we took it in for the 5k mile complimentary service. Shifting is still clunkier than my IS F, and I dislike the transmission programming in Sport and Sport+ because it is way too aggressive for my taste. The dealer didn't put the sticker on the hood either, which is really annoying because the LSB specifically says it needs to be documented on the car at the back of the hood.

I haven't got my official Techstream working yet because I haven't bought the Mongoose cable yet, but as soon as I do I'll be validating the flash was done. If anyone in ATL wants to know if they've had it done with independent verification, let me know and we can meet up to check.

mr2dave

Lance, I chose to not get the flash at my 5K since I do not have any real issues with my transmission so I cannot help validate. Curious to what you find out once you hook up your Techstream. I also did not get the oil pump flash since I am not experiencing any issues in that department either.

lobuxracer

iTrader: (2)

Oil pump flash? What is that? I haven't seen anything in TIS about the oil pump.

There are two low pressure fuel pump related ECM software updates in TIS. The first is dated 2016-07-05 for the US market, the second is 2016-11-04 for the Canadian market. They apply to the RCF and GSF platforms. There is no mention in the documentation any other systems are impacted by these updates, and they are specifically to address a noise coming from the low pressure fuel pump inside the fuel tank. The LSB clearly states this is only for a fuel pump noise, and if the update has been done, proceed with standard troubleshooting per the FSM.

mr2dave

Lance - your attention to detail busted me again. I meant the fuel pump, not oil. Sorry.