Results 1 to 4 of 4

Thread: Slight rattle during WOT/full boost

  1. #1
    Hybrid booster
    Join Date
    Dec 2005
    Location
    Uniontown, OH
    Posts
    1,000

    Slight rattle during WOT/full boost

    This started Friday. I drove the car Thursday night and had no problem. there was a big temperature difference from Thursday night to Friday night, much hotter, went from 60 to 85.

    I did top the gas off 5-6 gallons at one of my usual gas stations. I'm not getting any knock (cel) that I can tell. I changed the plugs out since they were from last season. Running 12-15psi of boost.

    I can't think of what it could be other than either some bad gas or valvetrain noise.

  2. #2
    boostaholic
    Join Date
    Jan 2006
    Location
    Clinton Twp Mi
    Posts
    1,395

    Re: Slight rattle during WOT/full boost

    Does your starter have a metal heat sheild on it ? Mine rattles like crazy at wot.

  3. #3
    Hybrid booster
    Join Date
    Dec 2005
    Location
    Uniontown, OH
    Posts
    1,000

    Re: Slight rattle during WOT/full boost

    No, it just has the soft heat shield with the metal clip.

  4. #4
    Hybrid booster
    Join Date
    Dec 2005
    Location
    Uniontown, OH
    Posts
    1,000

    Re: Slight rattle during WOT/full boost

    It had to have been detonation. I put some new gas in from a different gas station (one of my other stations that I frequent). I also bumped the base fuel pressure up just a hair (AFR reads 11.4-5:1 instead of 11.7-8:1). That seems to have taken care of the rattle.

    I am surprised though that my CEL didn't illuminate while this was happening since this is built into my cal. It's also a bit cooler out this morning; not sure if that contributed.

Similar Threads

  1. overboost....on a SS/Sc cobalt wtf
    By 1966 dart wagon in forum Other vehicles
    Replies: 12
    Last Post: 12-01-2008, 06:58 PM
  2. Effects of elevation on boost pressure
    By Koreth in forum Turbos & Intercoolers!
    Replies: 7
    Last Post: 11-10-2008, 02:42 AM
  3. Solving Boost Creep.....
    By inmyshadow in forum Turbos & Intercoolers!
    Replies: 2
    Last Post: 09-19-2008, 08:05 PM
  4. Terrible boost creep issues- need some ideas.
    By 86Shelby in forum Turbos & Intercoolers!
    Replies: 49
    Last Post: 05-25-2008, 12:44 PM
  5. stupid inconsistent boost...
    By Aries_Turbo in forum Turbos & Intercoolers!
    Replies: 13
    Last Post: 08-21-2006, 11:08 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •