Results 1 to 7 of 7

normal for air pump to come off and on while driving?

This is a discussion on normal for air pump to come off and on while driving? within the General Help forums, part of the LSx Technical Help Section category; It's on about 50% of the time. Car is a little low on power too....

  1. #1
    Junior Member
    Join Date
    Feb 2006
    Location
    GARDEN GROVE, CA
    Age
    43
    Posts
    95

    BLACK
    2002, CAMARO Z28

    normal for air pump to come off and on while driving?

    It's on about 50% of the time. Car is a little low on power too.
    2002 Camaro z28, m6, direct flow lid, maft, powerstick muffler with stainless z28 tips, lakewood lca, predator, vacuum gauge inside car, ngk tr55, msd wires
    stock dyno 310 rwhp, 329 trq

  2. #2
    Blown, Stroked, & Sprayed

    Ed Blown Vert's Avatar
    Join Date
    Aug 1999
    Location
    San Diego, Ca
    Posts
    50,526

    Black
    383 Procharged & N20 Vert

    If I remember correctly, once it reaches a certain temp. It should not come on.

  3. #3
    Senior Member SeVeReDiStOrTiOn's Avatar
    Join Date
    Aug 2005
    Location
    Roseville, CA
    Posts
    8,164

    05 Wrangler
    00 Z28 sold :-(

    Quote Originally Posted by Ed Blown Vert
    If I remember correctly, once it reaches a certain temp. It should not come on.


    Quote Originally Posted by occamaroz
    It's on about 50% of the time. Car is a little low on power too.
    You shure it's not the fan you're hearing? Did you adjust the on/off temps when you put in your predator tune? I know the basic performance tune does lower the on/off temps outta the box.

  4. #4
    Junior Member
    Join Date
    Feb 2006
    Location
    GARDEN GROVE, CA
    Age
    43
    Posts
    95

    BLACK
    2002, CAMARO Z28

    I don't run the predator tune because it worsens the par throttle pinging under a load.

  5. #5
    Impounded YoMommasTA's Avatar
    Join Date
    Jan 2006
    Location
    ne pa
    Posts
    532
    i believe the air pump can come on if the computer sees the o2s are not responding properly.also under coast conditions.the air pump is used to get the cats and o2s hot as fast as possible to keep unburn hydros down.i had some trouble with a blocked air valve that caused car to run less than normal at slow speeds,poor response etc.i think the reason why was because the air system is used to test and calibrate the o2s.so if one side is partialy blocked and not getting enough air the computer may not see it that way and try to turn the air on to heat the o2 up.but if the oneway valve is partialy blocks it can't get enough air in the exhaust to get it hot.after i replaced the partially blocked valve the throttle response was very good again.the fuel mileage went up too.

    i'm looking online to see if i can find a pdf that has all the air info.
    Last edited by YoMommasTA; 04-29-2006 at 09:09 AM.

  6. #6
    Senior Member SeVeReDiStOrTiOn's Avatar
    Join Date
    Aug 2005
    Location
    Roseville, CA
    Posts
    8,164

    05 Wrangler
    00 Z28 sold :-(

    Quote Originally Posted by occamaroz
    I don't run the predator tune because it worsens the par throttle pinging under a load.
    You running 91+ octane? You shouldn't get any pinging with the basic predator tune.

  7. #7
    Junior Member
    Join Date
    Feb 2006
    Location
    GARDEN GROVE, CA
    Age
    43
    Posts
    95

    BLACK
    2002, CAMARO Z28

    Quote Originally Posted by SeVeReDiStOrTiOn
    You running 91+ octane? You shouldn't get any pinging with the basic predator tune.
    I do below 2k rpm only. Up to 12 degrees of kr. Stock programmed I still see 6 degrees kr. I just replaced the driverside air pump check valve and did the passenger side maybe 6 months ago. When the car runs low on power the exhaust pops alot upshifting compared to when it runs hard the exhaust doesn't pop. My fuel trims are fine part and wot throttle.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Bookmarks

Posting Permissions

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