Whirring Spaceship Noise Sound GSF
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Whirring Spaceship Noise Sound GSF
For the last 4 weeks I have experienced a crazy whirring sound that has gotten progressively louder. The sound was present about 95% of the time, sometimes varied in tone, rhythmic, independent of engine speed or brakes, occurs at idle or under power, nothing I did would change the sound. When I turned the engine off, it would continue for about 0.5-1.0 second after the engine stops. I couldn't localize the sound, but it could only be heard inside the cabin. Not from the speakers. I finally got a chance to take it to the dealer. They confirmed the details of the sound and after some checking found a bulletin for a fuel pump electronic update. The fuel pump is located under the rear driver side seat. They had seen the problem very infrequently with the RCF, but had never seen it with a GSF yet. They are updating the car at the moment, but seemed very confident that the update will increase the fuel pump pressure, eliminating the sound and also improving responsiveness when accelerating. I searched and searched and couldn't find anything on this, so I thought I would post for others to reference.
#2
Lexus Champion
Uh oh... I think you're the first GSF owner to experience the fuel pump issue. Head on over to the RCF forum and you'll see the issue wasn't as "infrequent" as the dealer said. There were MANY complaints and some owners that went through up to three fuel pumps trying to remedy the whirring until the update was rolled out. The software update seems to have taken care of the issue though so you should be good to go.
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finny76 (04-05-17)
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Here's a couple of threads form the RCF forum:
https://www.clublexus.com/forums/rc-...fuel-pump.html
https://www.clublexus.com/forums/rc-...600-miles.html
and one from this forum:
https://www.clublexus.com/forums/gs-...ump-issue.html
Lou
https://www.clublexus.com/forums/rc-...fuel-pump.html
https://www.clublexus.com/forums/rc-...600-miles.html
and one from this forum:
https://www.clublexus.com/forums/gs-...ump-issue.html
Lou
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My understanding is that the only benefit of the higher grade is engine performance as long as you don't have knocking. Knocking represents preignition in the cylinder in this case from lower octane fuel which ignites quicker. Modern engines have knock sensors that adjust engine timing to prevent this from happening. I felt that mid-grade was a good compromise considering the cost. This car is fast enough that I am not worried about a fractional decrease in performance. The lower octane will not result in any other engine problems. There is no difference in how clean it keeps your engine. I would be interested in opposing views.
This is from the manual:
GS350/GS F
Select premium unleaded gasoline with an octane rating of 91 (Research
Octane Number 96) or higher required for optimum engine performance.
If 91 octane cannot be obtained, you may use unleaded gasoline with an
octane rating as low as 87 (Research Octane Number 91). Use of unleaded
gasoline with an octane rating lower than 91 may result in engine knocking
and significantly reduced performance. Persistent knocking can lead to
engine damage and should be corrected by refueling with higher octane
unleaded gasoline.
This is from the manual:
GS350/GS F
Select premium unleaded gasoline with an octane rating of 91 (Research
Octane Number 96) or higher required for optimum engine performance.
If 91 octane cannot be obtained, you may use unleaded gasoline with an
octane rating as low as 87 (Research Octane Number 91). Use of unleaded
gasoline with an octane rating lower than 91 may result in engine knocking
and significantly reduced performance. Persistent knocking can lead to
engine damage and should be corrected by refueling with higher octane
unleaded gasoline.
#14
Lexus Champion
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^^^^To each his own I guess. Why buy and pay for a high performance vehicle and then not put in the recommended fuel? I wont even use a fuel that is not designated as Top Tier. Wish they offered 93 octane in the west like they do in the east. Over time using a lower octane fuel than recommended may or may not have a detrimental effect on the engine. If that's a chance you're willing to take, good luck to you.
Lou
Lou
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My understanding is that the only benefit of the higher grade is engine performance as long as you don't have knocking. Knocking represents preignition in the cylinder in this case from lower octane fuel which ignites quicker. Modern engines have knock sensors that adjust engine timing to prevent this from happening. I felt that mid-grade was a good compromise considering the cost. This car is fast enough that I am not worried about a fractional decrease in performance. The lower octane will not result in any other engine problems. There is no difference in how clean it keeps your engine. I would be interested in opposing views.
This is from the manual:
GS350/GS F
Select premium unleaded gasoline with an octane rating of 91 (Research
Octane Number 96) or higher required for optimum engine performance.
If 91 octane cannot be obtained, you may use unleaded gasoline with an
octane rating as low as 87 (Research Octane Number 91). Use of unleaded
gasoline with an octane rating lower than 91 may result in engine knocking
and significantly reduced performance. Persistent knocking can lead to
engine damage and should be corrected by refueling with higher octane
unleaded gasoline.
This is from the manual:
GS350/GS F
Select premium unleaded gasoline with an octane rating of 91 (Research
Octane Number 96) or higher required for optimum engine performance.
If 91 octane cannot be obtained, you may use unleaded gasoline with an
octane rating as low as 87 (Research Octane Number 91). Use of unleaded
gasoline with an octane rating lower than 91 may result in engine knocking
and significantly reduced performance. Persistent knocking can lead to
engine damage and should be corrected by refueling with higher octane
unleaded gasoline.