Page 1 of 3 123 LastLast
Results 1 to 20 of 48

Thread: Mystery MAF?

  1. #1
    Veteran pajeff02's Avatar
    Join Date
    Feb 2009
    Location
    Mansfield, PA
    Posts
    22,146

    Black & Blue
    '02 WS.6 / '07 Suburban

    Mystery MAF?

    After reading all the MAF threads (and being greatly entertained) I decided to replace my hacked up MAF:





    I ordered through GM Parts Direct and did the e-mail confirmation of the part number before submitting the order (as instructed). This is what I received:





    It is an AC Delco, but it has five pins and an adapter harness to convert to three pins. It almost looks like it has an IAT built into the housing. As this is completely different than my original I just want to make sure it is the correct replacement. Anyone?
    Last edited by pajeff02; 05-10-2009 at 03:56 AM. Reason: I can't count -- and that's why I ride the short bus!

  2. #2
    Member 02WS6dream's Avatar
    Join Date
    Jun 2006
    Location
    Charlotte, NC
    Age
    41
    Posts
    668

    08 Mustang GT/CS Blue
    2002 Trans Am WS6 traded

    have they redesigned it or something?? I can testify that my 02 had a stock MAF and looked much closer to the first metal one than the new plastic one...

  3. #3
    Awaiting Activation
    Join Date
    Sep 2007
    Location
    Philly+Glenmoore, Pa
    Age
    35
    Posts
    4,703

    Pewter Metallic
    2002 Trans Am WS6 M6 D1SC

    Yeah thats completely different.

    I dunno what the deal is but the new one doesnt seem like it flows as well as the old stock one.

  4. #4
    Impounded
    Join Date
    Oct 2007
    Location
    Beaver Dam KY
    Posts
    7,745

    79 T/A -91 Firebird
    1998 Trans Am -Oynx Black

    They might have redesigned it IDK if it would work or not

  5. #5
    Member 02WS6dream's Avatar
    Join Date
    Jun 2006
    Location
    Charlotte, NC
    Age
    41
    Posts
    668

    08 Mustang GT/CS Blue
    2002 Trans Am WS6 traded

    same diameter? don't see why it would flow significantly less is same size..

  6. #6
    Senior Member Cutlass's Avatar
    Join Date
    Apr 2008
    Location
    Madison, WI
    Posts
    7,006

    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    I'd say no, it not the correct one

  7. #7
    Veteran pajeff02's Avatar
    Join Date
    Feb 2009
    Location
    Mansfield, PA
    Posts
    22,146

    Black & Blue
    '02 WS.6 / '07 Suburban

    Well... I hit the books and did some measuring. It appears that the new MAF is "LS6" based as it has an 85mm bore and an integrated IAT sensor. I went back to GM Parts Direct and ran a search both by part number and vehicle application. Both searches resulted in this being the correct AC Delco replacement MAF for a 1998-2002 Firebird 5.7 liter LS1. The new MAF came with the adapter harness (pictured) so that it will plug into my vehicle... I just don't want to screw up my A/F and risk any problems. My PCM is expecting a signal from a 75mm MAF.


    After more reading: It appears that the new MAF may be calibrated for the LS1... it's electronics apparently send the PCM an adjusted signal to allow for proper A/F calibration. Anyone?
    Last edited by pajeff02; 05-09-2009 at 08:13 AM.

  8. #8
    515 HP TrickFlow Package BADASS2000SS's Avatar
    Join Date
    Feb 2008
    Location
    Palm Beach, FL
    Age
    46
    Posts
    1,702

    440 RWHP / 410 TQ
    2000 SLP CAMARO SS

    Install it! You car will not run correctly or at all if its the wrong one. See what happens. I have never seen a TB like that one before for our cars.
    2000 SLP Camaro SS M6 * 515 HP TrickFlow Package * FAST 92 MM Intake * Nick Williams 92 MM TB * Volant CAI * Granatelli MAF * Full Custom True Dual Exhaust with X-Pipe * Tuned by Breathless Performance

  9. #9
    Veteran Hi-Po's Avatar
    Join Date
    Nov 2005
    Location
    Florida
    Posts
    10,467

    Black
    1999 TA WS.6

    Quote Originally Posted by pajeff02 View Post
    Well... I hit the books and did some measuring. It appears that the new MAF is "LS6" based as it has an 85mm bore and an integrated IAT sensor. I went back to GM Parts Direct and ran a search both by part number and vehicle application. Both searches resulted in this being the correct AC Delco replacement MAF for a 1998-2002 Firebird 5.7 liter LS1. The new MAF came with the adapter harness (pictured) so that it will plug into my vehicle... I just don't want to screw up my A/F and risk any problems. My PCM is expecting a signal from a 75mm MAF.


    After more reading: It appears that the new MAF may be calibrated for the LS1... it's electronics apparently send the PCM an adjusted signal to allow for proper A/F calibration. Anyone?
    If your maf has five wires, it has the IAT integrated. Appears this MAF has 3.

  10. #10
    Impounded
    Join Date
    Oct 2007
    Location
    Beaver Dam KY
    Posts
    7,745

    79 T/A -91 Firebird
    1998 Trans Am -Oynx Black

    Quote Originally Posted by Hi-Po View Post
    If your maf has five wires, it has the IAT integrated. Appears this MAF has 3.
    It is 5 wire with a 3 wire adapter. I guess its a multiple fit maf?

  11. #11
    Veteran pajeff02's Avatar
    Join Date
    Feb 2009
    Location
    Mansfield, PA
    Posts
    22,146

    Black & Blue
    '02 WS.6 / '07 Suburban

    It is a five pin connector on the MAF (someday I will learn to count). The adapter harness only utilizes three of the pins. I searched on other GM Parts sites and kept coming up with the same P/N. I guess I'll hook it up and see what happens.

  12. #12
    I don't sell out! blackSS01's Avatar
    Join Date
    Jul 2005
    Location
    Wisconsin
    Posts
    5,558

    Black
    2001 Camaro SS M6

    I am curious to see how this goes down. Keep us posted. Hopefully Frost sees this thread and has some intel as to what where dealing with
    ┌∩┐(◕_◕)┌∩┐

    Man: The Mods you are fighting,
    they are the biggest Men I have ever seen. I
    wouldn't want to fight them!

    Me: That is why no one will remember your name!

  13. #13
    Veteran Hi-Po's Avatar
    Join Date
    Nov 2005
    Location
    Florida
    Posts
    10,467

    Black
    1999 TA WS.6

    Quote Originally Posted by JoshieDoom View Post
    It is 5 wire with a 3 wire adapter. I guess its a multiple fit maf?
    If I had a guess, yes. I bet in attempt to cut costs they are building one MAF, and selling it with or without an extension.

  14. #14
    Veteran pajeff02's Avatar
    Join Date
    Feb 2009
    Location
    Mansfield, PA
    Posts
    22,146

    Black & Blue
    '02 WS.6 / '07 Suburban

    Got everything hooked back up and seems to be running fine. I put about 25 miles on it this evening -- watched the MAF readings with my Hypertech idling and under load. Seemed to be all ok. No SES or anything strange, the PCM wasn't pulling timing, and temp stayed good. I'll keep an eye on it and maybe shoot GM Parts Direct an e-mail inquiry on the MAF part number.

    I also experienced first hand what everyone has said about the SLP Lid fitment. I question whether I have a good seal along the back edge, even with the foam strip that came with the kit. Have to check that with a mirror tomorrow.

    Thanks for all the input!

  15. #15
    Senior Member Cutlass's Avatar
    Join Date
    Apr 2008
    Location
    Madison, WI
    Posts
    7,006

    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    Quote Originally Posted by pajeff02 View Post
    I also experienced first hand what everyone has said about the SLP Lid fitment. I question whether I have a good seal along the back edge, even with the foam strip that came with the kit. Have to check that with a mirror tomorrow.
    Are you using the SLP smooth bellows also? If so, then you will most likely have to trim it to allow the lid to slid back all the way in.

  16. #16
    Veteran pajeff02's Avatar
    Join Date
    Feb 2009
    Location
    Mansfield, PA
    Posts
    22,146

    Black & Blue
    '02 WS.6 / '07 Suburban

    From what I could tell, the smooth bellows are more of an appearance thing without any real advantage. Rather than spend the $60, I decided to keep the factory bellows. During install, I left the clamp loose on the t/b while I worked the lid into place. Per past threads, I also made sure the front of the lid was behind the lower housing lip. Just seems that the back of the lid is arched up a bit, even though all four prongs are seated where they should be.

  17. #17
    515 HP TrickFlow Package BADASS2000SS's Avatar
    Join Date
    Feb 2008
    Location
    Palm Beach, FL
    Age
    46
    Posts
    1,702

    440 RWHP / 410 TQ
    2000 SLP CAMARO SS

    Quote Originally Posted by pajeff02 View Post
    Got everything hooked back up and seems to be running fine. I put about 25 miles on it this evening -- watched the MAF readings with my Hypertech idling and under load. Seemed to be all ok. No SES or anything strange, the PCM wasn't pulling timing, and temp stayed good. I'll keep an eye on it and maybe shoot GM Parts Direct an e-mail inquiry on the MAF part number.

    Thanks for all the input!
    See that, a real life test and tune session! With out needing the tune!

  18. #18
    Senior Member Cutlass's Avatar
    Join Date
    Apr 2008
    Location
    Madison, WI
    Posts
    7,006

    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    Quote Originally Posted by pajeff02 View Post
    From what I could tell, the smooth bellows are more of an appearance thing without any real advantage. Rather than spend the $60, I decided to keep the factory bellows. During install, I left the clamp loose on the t/b while I worked the lid into place. Per past threads, I also made sure the front of the lid was behind the lower housing lip. Just seems that the back of the lid is arched up a bit, even though all four prongs are seated where they should be.
    Yep you know what up with these then. The plastic isn't as rigid as the stock one. The rear tabs flex. A SLP smooth bellows trimmed short kinda helps pull the rear of the lid in and down. But I still ended up ramming everything together, holding it in, and running screws through the tabs and the filter housing base. Seals great now...pain in the ass when I wanna work on the damn thing though

  19. #19
    Veteran pajeff02's Avatar
    Join Date
    Feb 2009
    Location
    Mansfield, PA
    Posts
    22,146

    Black & Blue
    '02 WS.6 / '07 Suburban

    That's not a bad idea. If I do have a gap I'll consider placing screws in the tabs -- probably have to do it to the inside tabs only from the way it looked and that should be enough to snug it down. Thanks for the idea!

  20. #20
    TJEA Retirement Home Dr.Crash's Avatar
    Join Date
    Feb 2006
    Location
    U. S And A Greatest country in all of world
    Posts
    3,384

    Stock
    2002 Camaro

    Quote Originally Posted by pajeff02 View Post
    From what I could tell, the smooth bellows are more of an appearance thing without any real advantage. Rather than spend the $60, I decided to keep the factory bellows. During install, I left the clamp loose on the t/b while I worked the lid into place. Per past threads, I also made sure the front of the lid was behind the lower housing lip. Just seems that the back of the lid is arched up a bit, even though all four prongs are seated where they should be.
    i got mine from homedepot. works great and its smooth

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Question: LS1 Mystery: Need solving
    By GTMRACR in forum General Help
    Replies: 12
    Last Post: 05-25-2011, 08:45 AM
  2. Help: Mystery Part
    By duweller in forum Firebird / WS6
    Replies: 7
    Last Post: 06-14-2010, 06:07 AM
  3. Question: Marvel Mystery Oil in Gas/Oil in the LS1
    By camaroluvr447 in forum Internal Engine
    Replies: 7
    Last Post: 10-07-2009, 08:27 AM
  4. marvel mystery oil...
    By jray0305usa in forum Internal Engine
    Replies: 0
    Last Post: 03-05-2009, 06:26 PM
  5. 99 Z-28 Electrical Mystery
    By jterhar in forum General Help
    Replies: 3
    Last Post: 09-21-2006, 06:38 AM

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
  •