Turbo Problems please help - Page 5 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

sw20kosh · 05-01-2013, 03:35 AM

Quote:

Originally Posted by ft_sjo

It would if the leak was after the MAF sensor.

This is what I had in mind. As I said, "metered air"... so anywhere after the MAF.

ft_sjo · 05-01-2013, 03:53 AM

Quote:

Originally Posted by sw20kosh

This is what I had in mind. As I said, "metered air"... so anywhere after the MAF.

It's a bit concerning that such an incorrect statement would come from a vendor who supposedly tunes these things.

86pro · 05-01-2013, 06:34 AM

are you serious? Dont knock FA20Club and keep on topic. you guys didnt see the second post? plus i would imagine after your "metered air " is measure by maf the cpu does the rest so yes it doesnt matter. What you think would happen if you didnt have maf in , engine wont run properly. lets keep on topic and hope he gets it fixed soon.

Sportsguy83 · 05-01-2013, 07:26 AM

Quote:

Originally Posted by 86pro

are you serious? Dont knock FA20Club and keep on topic. you guys didnt see the second post? plus i would imagine after your "metered air " is measure by maf the cpu does the rest so yes it doesnt matter. What you think would happen if you didnt have maf in , engine wont run properly. lets keep on topic and hope he gets it fixed soon.

First of all, its ECU not "CPU". Second, if your MAF sensor "meters" 10 lbs. of air, it will insert X amount of gasoline into the mix needed to properly mix with 10 lbs of air. If that "metered" air is lost via a leak AFTER the MAF sensor, the car does not know about the leak and it will still input X amount of gas required for 10 lbs of air. This will make an extremely rich condition.

Also, No one here is saying "remove the MAF sensor, or run without MAF sensor".

Sportsguy83 · 05-01-2013, 07:30 AM

Quote:

Originally Posted by whitefrs

John told me that PSI was set to 7.
can this increase just by error
John @Visconti can you please confirm these

Did John tell you boos cut was set to 7, or that the WG spring was set to 7?

Like I initially thought, it seems you are hitting boost cut because that event where the car is building boost and around 4K RPM's it just STOPS and RPM's die down to idle level is exactly what happened to me on overboost.

BUT, you should check all couplers and connections because such a high AFR (8) does seem like you might have a boost leak after MAF.

SloS14 · 05-01-2013, 08:09 AM

Quote:

Originally Posted by Sportsguy83

BUT, you should check all couplers and connections because such a high AFR (8) does seem like you might have a boost leak after MAF.

+1

King Tut · 05-01-2013, 10:16 AM

Quote:

Originally Posted by ft_sjo

It would if the leak was after the MAF sensor.

The one time I have blown a coupler off with my FBM kit, it was the throttle body coupler that came off.

whitefrs · 05-01-2013, 10:21 AM

But what i dont understand is how did a coupler or anything came loose when i was not using the car

King Tut · 05-01-2013, 10:26 AM

The couplers come loose when you hit boost.

ft_sjo · 05-01-2013, 10:32 AM

Quote:

Originally Posted by King Tut

The one time I have blown a coupler off with my FBM kit, it was the throttle body coupler that came off.

I assume the TB isn't swaged as it was never designed for boost?

King Tut · 05-01-2013, 10:36 AM

Quote:

Originally Posted by ft_sjo

I assume the TB isn't swaged as it was never designed for boost?

It has a lip at the end to help the coupler and clamp, but it isn't as big as the rolled lips on the piping in the kit.

rusty959 · 05-01-2013, 10:39 AM

My suggestion:

Stop driving the car for a few days. In those few days, spend all the time you can learning about turbo systems, how they work. All the while be going to your car with the hood popped to figure out where everything is. Know how everything works. Have slight ideas what might happen if any piece were to fail. Then while you are at it, learn what everything else in the engine bay does.

At the end of these few days, figure out how to make a boost leak checker. You can get the parts at lowes for like $30. Check if you have a boost leak. If there are some, fix them, see if the problem still happens, and then report back.

Here is an example of one:
[ame="http://www.youtube.com/watch?v=atretf9u-Mc"]Boost Leak Tester DIY - YouTube[/ame]

I didn't watch the video to see if its actually good, so look around and decide the best way you want to do it. Regardless, no turbo car should be without one.

whitefrs · 05-01-2013, 11:31 AM

Thanks for you help guys
My friend owns a turbo honda and he knows his stuff so he will check it today.

mad_sb · 05-01-2013, 11:35 AM

Quote:

Originally Posted by whitefrs

lets say im driving and then when i hit boost the car slows down and looses all the power.

im not sure how to explain it

I'm guessing boost leak.. and possibly borked clutch.

05-01-2013, 10:21 AM	#64
whitefrs Love Boost!!!!!!!! Join Date: Jun 2012 Drives: Whiteout Scion FR-S Location: Long Island NY Posts: 3,612 Thanks: 429 Thanked 902 Times in 606 Posts Mentioned: 87 Post(s) Tagged: 3 Thread(s)	But what i dont understand is how did a coupler or anything came loose when i was not using the car __________________ ༼ つ ◕_◕ ༽つ I LOVE BOOST ༼ つ ◕_◕ ༽つ

05-01-2013, 10:26 AM	#65
King Tut NASA SpecE30 Racer Join Date: May 2012 Drives: 2006 Honda S2000 Location: Gulf Breeze, FL Posts: 7,279 Thanks: 607 Thanked 5,759 Times in 3,055 Posts Mentioned: 274 Post(s) Tagged: 10 Thread(s)	The couplers come loose when you hit boost. __________________ - King Tut Street/Track Car: 2006 Honda S2000 TT3 \|\| Race Car: 1987 BMW 325is SpecE30 \|\| Tow Vehicle: 2014 RAM 1500 EcoDiesel Sold Cars: 2012 BMW M3 \|\| 2013 Subaru BRZ \|\| 2012 Porsche Cayman R \|\| 2009 Chevrolet Z06 \|\| 2009 BMW M3 \|\| 2004 BMW M3 \|\| 2004 Nissan 350Z

05-01-2013, 10:39 AM	#68
rusty959 Senior Member Join Date: Jun 2012 Drives: DGM BRZ limited Location: Indiana Posts: 366 Thanks: 98 Thanked 145 Times in 95 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	My suggestion: Stop driving the car for a few days. In those few days, spend all the time you can learning about turbo systems, how they work. All the while be going to your car with the hood popped to figure out where everything is. Know how everything works. Have slight ideas what might happen if any piece were to fail. Then while you are at it, learn what everything else in the engine bay does. At the end of these few days, figure out how to make a boost leak checker. You can get the parts at lowes for like $30. Check if you have a boost leak. If there are some, fix them, see if the problem still happens, and then report back. Here is an example of one: [ame="http://www.youtube.com/watch?v=atretf9u-Mc"]Boost Leak Tester DIY - YouTube[/ame] I didn't watch the video to see if its actually good, so look around and decide the best way you want to do it. Regardless, no turbo car should be without one. __________________

05-01-2013, 11:31 AM	#69
whitefrs Love Boost!!!!!!!! Join Date: Jun 2012 Drives: Whiteout Scion FR-S Location: Long Island NY Posts: 3,612 Thanks: 429 Thanked 902 Times in 606 Posts Mentioned: 87 Post(s) Tagged: 3 Thread(s)	Thanks for you help guys My friend owns a turbo honda and he knows his stuff so he will check it today. __________________ ༼ つ ◕_◕ ༽つ I LOVE BOOST ༼ つ ◕_◕ ༽つ

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05-01-2013, 06:34 AM	#59
86pro Senior Member Join Date: Sep 2012 Drives: frs Location: tdot Posts: 149 Thanks: 13 Thanked 22 Times in 19 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	are you serious? Dont knock FA20Club and keep on topic. you guys didnt see the second post? plus i would imagine after your "metered air " is measure by maf the cpu does the rest so yes it doesnt matter. What you think would happen if you didnt have maf in , engine wont run properly. lets keep on topic and hope he gets it fixed soon.

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