Mazda-speed.com
July 07, 2020, 05:07:41 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Mazda-speed.com is no longer open and is now a read-only site. For Mazdaspeed Miata discussions, please visit the Mazdaspeed section on Miata.net.
 
   Home   Help Login Register  
Pages: [1]   Go Down
  Print  
Author Topic: O2 signal modifier noise  (Read 3000 times)
0 Members and 1 Guest are viewing this topic.
timmcc02
First Gear
*
Posts: 17


« on: March 24, 2016, 04:53:49 PM »

So I'm posting this here cause I didn't get a reply from FM. Ever since I installed my O2 modifier it makes this slight rattle noise from inside the modifier itself under acceleration. After installing a boost gauge I found it to be consistent with when manifold pressure is at 0 is when it makes the noise. My question is this normal? The car drives great other than boost fluctuating about 2 psi at full throttle.
Logged
SilverMiataRacer
Global Moderator
Fifth Gear
*****
Posts: 25931



WWW
« Reply #1 on: March 24, 2016, 07:35:15 PM »

First question would be did you call FM??
Logged

Larry

4 Miatas but who's counting!!   Cool

White Knight    1991 Crystal White   #99 CSP
Silver Bullet     1992 Silverstone     #17 SM2  FM I+ Turbo  (Gone but not forgotten)
Honey B          1992 Sunburst Yellow #99 SM2 J.R. M45
Whooosh         2004 Titanium MazdaSpeed MX5  #403 of 4000
Subie              2006 Steel Gray WRX STi Cobb Stage 2 (Gone but not forgotten)
No name yet    2008 Velocity Yellow Tintcoat Z06 Corvette
No Name yet    2014 Ashen Grey Metallic Camaro 2SS 1LE

“There are only three sports: mountain climbing, bull fighting, and motor racing. All the rest are merely games.”
– Ernest Hemingway
rotorglow
Toyotae non carborundum.
Fifth Gear
*****
Posts: 2699


« Reply #2 on: March 24, 2016, 08:09:10 PM »

Don't know about "normal," but it happened to me.  It was the pressure switch fluttering a little before actual boost opened it fully.  I can't remember if I bothered fix it by changing the pressure setting (I had the older model of the modifier), or if I simply removed it before fixing it.

It seemed to work ok otherwise.
Logged

2004 VR Sport: FM Big Enchilada w/ Hydra 2.7 + DeatschWerks 700cc injectors + FM crossflow rad + 3.63 rear gears + ES poly diff bushings + comp motor mounts--Koni Sports + Ground Control 550/375 + Racing Beat 1.125" bar + blocks & bolts--Wilwood/AX6 brakes--15x8 6ULs + RE-71Rs--Speedhut + Clearwaters + Auxmod + other misc electrics
timmcc02
First Gear
*
Posts: 17


« Reply #3 on: March 24, 2016, 08:16:51 PM »

I had emailed FM like 3 or 4 weeks ago.
Logged
SilverMiataRacer
Global Moderator
Fifth Gear
*****
Posts: 25931



WWW
« Reply #4 on: March 24, 2016, 08:29:30 PM »

I said call.  Sometimes an email might get lost.
Logged

Larry

4 Miatas but who's counting!!   Cool

White Knight    1991 Crystal White   #99 CSP
Silver Bullet     1992 Silverstone     #17 SM2  FM I+ Turbo  (Gone but not forgotten)
Honey B          1992 Sunburst Yellow #99 SM2 J.R. M45
Whooosh         2004 Titanium MazdaSpeed MX5  #403 of 4000
Subie              2006 Steel Gray WRX STi Cobb Stage 2 (Gone but not forgotten)
No name yet    2008 Velocity Yellow Tintcoat Z06 Corvette
No Name yet    2014 Ashen Grey Metallic Camaro 2SS 1LE

“There are only three sports: mountain climbing, bull fighting, and motor racing. All the rest are merely games.”
– Ernest Hemingway
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Valid XHTML 1.0! Valid CSS!

Copyright © 2007-2016, Eunos Communications LLC