Excessive valve chatter at idle while hot? - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

tomm.brz · 05-14-2018, 04:48 PM

yes if you open the hood is pretty violent noise but from the cabin it just sounds as crickets

Tcoat · 05-14-2018, 04:58 PM

Quote:

Originally Posted by tomm.brz

mm nope. idle when hot it uses only DI.
cold start it does DI PI together, then switch quit fast to ONLY PI during warm up, then switch to normal idle and use only DI
after 191 flash on my brz i learnt this too good to be wrong

you can see the Pi to DI % maps to check that at idle load it doesnt use PI

can t trll you right now what is louder from outside, but from inside the cabin of my my17 i hear louder clicks when only the DI is used

Yep. Sorry I used some bad phrasing there. By "together" I didn't mean both at once just by switching back and forth that they are work "together" to deliver what the car is asking for. They are working together independently.

tomm.brz · 05-14-2018, 05:24 PM

mmm i don t really like the word "independently" but yes they work together based on the percentages written on those tables

Decep · 05-14-2018, 11:28 PM

gotta love that diesel-like injector clatter.

churchx · 05-15-2018, 12:21 AM

Is that noise injectors or high pressure fuel pump, whose chirping noise been brought up here few times? For me it is not enough an issue to care about though, til it's nothing wrong mechanically or electric, and if it's not affecting performance or life of engine. Just a trait of car to get used to.

Spuds · 05-15-2018, 12:50 AM

Quote:

Originally Posted by Tcoat

Yep. Sorry I used some bad phrasing there. By "together" I didn't mean both at once just by switching back and forth that they are work "together" to deliver what the car is asking for. They are working together independently.

Wow that's an oxymoron if I've ever seen one.

humfrz · 05-15-2018, 02:17 AM

Quote:

Originally Posted by Spuds

Wow that's an oxymoron if I've ever seen one.

Hey, Spuds, @Tcoat is getten long in tooth ...... cut him some slack .....

humfrz

guybo · 05-15-2018, 05:50 AM

Quote:

Originally Posted by Ultramaroon

I'd never get out of the driveway.

It'd be pretty difficult to drive out of your driveway while listening to your engine with a stethoscope. If you pull it off, post a video.

Tcoat · 05-15-2018, 06:06 AM

Quote:

Originally Posted by Spuds

Wow that's an oxymoron if I've ever seen one.

LOL Yes that was indeed the intent.

Tcoat · 05-15-2018, 06:07 AM

Quote:

Originally Posted by churchx

Is that noise injectors or high pressure fuel pump, whose chirping noise been brought up here few times? For me it is not enough an issue to care about though, til it's nothing wrong mechanically or electric, and if it's not affecting performance or life of engine. Just a trait of car to get used to.

Nope. The fuel pump is a whole different set of noises. More like and old V belt that has hardened up.

73TORANA! · 01-02-2020, 12:49 AM

Hi all, there does seem to be lifter noise when hot but if you bring the idle up to around 1500 then turn the engine off it is considerably quieter as the engine runs down indicating to me that it does have a lot of injector noise.

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05-14-2018, 04:48 PM	#15
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,292 Thanks: 517 Thanked 1,125 Times in 815 Posts Mentioned: 70 Post(s)	yes if you open the hood is pretty violent noise but from the cabin it just sounds as crickets

05-14-2018, 05:24 PM	#17
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,292 Thanks: 517 Thanked 1,125 Times in 815 Posts Mentioned: 70 Post(s)	mmm i don t really like the word "independently" but yes they work together based on the percentages written on those tables

05-14-2018, 11:28 PM	#18
Decep Senior Member Join Date: May 2017 Drives: 2013 FR-S Series 10 Location: CA Posts: 1,072 Thanks: 172 Thanked 497 Times in 326 Posts Mentioned: 6 Post(s)	gotta love that diesel-like injector clatter.

05-15-2018, 12:21 AM	#19
churchx Senior Member Join Date: Mar 2015 Drives: 2014 GT86 Location: Latvia, Riga Posts: 4,336 Thanks: 698 Thanked 2,091 Times in 1,437 Posts Mentioned: 53 Post(s)	Is that noise injectors or high pressure fuel pump, whose chirping noise been brought up here few times? For me it is not enough an issue to care about though, til it's nothing wrong mechanically or electric, and if it's not affecting performance or life of engine. Just a trait of car to get used to.

01-02-2020, 12:49 AM	#25
73TORANA! Member Join Date: Mar 2014 Drives: Orange GTS Location: Australia Posts: 65 Thanks: 19 Thanked 10 Times in 8 Posts Mentioned: 1 Post(s)	Hi all, there does seem to be lifter noise when hot but if you bring the idle up to around 1500 then turn the engine off it is considerably quieter as the engine runs down indicating to me that it does have a lot of injector noise.

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