« previous next »
Pages: [1]   Go Down

Author Topic: Downpipe cause knock reading?  (Read 2118 times)

0 Members and 1 Guest are viewing this topic.

Offline trashmechlv

  • Turbo Street Limited
  • ***
  • Posts: 129
  • PSI: 0
    • View Profile
Downpipe cause knock reading?
« on: June 14 2013, 05:21:12 PM »
Can a downpipe vibrating against the a/c evaporator box cause false knock readings on Scanmaster?
Logged
Mike G

87 GN, TA52, ATR headers, 3" downpipe, 80lb inj's and TT 6.1 chip, CAS V4 IC, PTC 9.5 NL, B&M transcooler, stock posi rear 3.42, Hellwig rear bar, Spohn solid LCAs on E85! 11.46@ 115mph

Offline Steve Wood

  • Turbo Street Outlaw
  • *******
  • Posts: 9950
  • PSI: 34
    • View Profile
    • http://www.vortexbuicks-etc.com/
Re: Downpipe cause knock reading?
« Reply #1 on: June 14 2013, 05:32:00 PM »
yes, indeed...or if it bangs the rear upper control arm ear
Logged
Steve Wood

http://www.vortexbuicks-etc.com

A lot of broken parts does not make you a racer; it makes you a slow learner.

Offline trashmechlv

  • Turbo Street Limited
  • ***
  • Posts: 129
  • PSI: 0
    • View Profile
Re: Downpipe cause knock reading?
« Reply #2 on: June 14 2013, 06:04:48 PM »
Thanks, I will add clearance downpipe to my "to do list"
Logged
Mike G

87 GN, TA52, ATR headers, 3" downpipe, 80lb inj's and TT 6.1 chip, CAS V4 IC, PTC 9.5 NL, B&M transcooler, stock posi rear 3.42, Hellwig rear bar, Spohn solid LCAs on E85! 11.46@ 115mph

Offline Steve Wood

  • Turbo Street Outlaw
  • *******
  • Posts: 9950
  • PSI: 34
    • View Profile
    • http://www.vortexbuicks-etc.com/
Re: Downpipe cause knock reading?
« Reply #3 on: June 14 2013, 09:37:08 PM »
check the drivers side engine mount...that is often the culprit that allows it to happen
Logged
Steve Wood

http://www.vortexbuicks-etc.com

A lot of broken parts does not make you a racer; it makes you a slow learner.
Pages: [1]   Go Up
« previous next »
 
SimplePortal 2.3.7 © 2008-2024, SimplePortal