Page 9 of 9 FirstFirst ... 789
Results 121 to 123 of 123

Thread: Assorted ramblings and bolt-ons with Daniel and George

  1. #121
    Senior Member Duke George V's Avatar
    Join Date
    Sep 2007
    Location
    Lost Wages
    Vehicle
    1996 Buick Century wagon, 1992 Buick Century sedan, 1993 Buick Century wagon
    Posts
    2,400

    Default

    After some testing with HP Tuners and a trip to the junkyard, I am just about convinced I have a bad PCM. First thing to tip me off was another scan of trouble codes turned up a different set than before. For example, the throttle position sensor code was gone, and in its place was an oxygen sensor code. I swapped out the cooling fan motor with one from the yard, and it did not work. So I commanded it on in HP Tuners, but it didn't turn on at all. It is possible I got a bad motor from the yard.

    I also tested a few other functions, like increasing the idle speed on the fly, and setting timing at 20 degrees advanced static, and that worked. Commanding the transmission into a specific gear did not, however, which is in line with the three trans solenoid codes. The trans currently only has one gear (3rd) unless I put the shifter in 2. So I will be purchasing a new PCM from Mike Miller, since he's basically the only person making a '97 PCM run on a '96 car.

    I also have a transmission lined up. Regardless of the solenoid codes, it is making noises that indicate it is not long for this world. When I posted about the problems in one of the Facebook groups I'm a member of, someone in Ontario, CA, offered a unit from a '96 Grand Prix for less than I would pay locally from a yard. The only difference I know of between a Century and GP trans is the final drive: both have a 3.33, but the A-body has an overdrive chain ratio, while the W-body has a 1:1 chain, so the overall final is 3.33. I've been toying with getting a 3.33 final anyway, so this is a good opportunity to test an upgrade.
    Last edited by Duke George V; 11-28-2017 at 12:19 AM.
    Daniel
    Kaiser George IX: 1996 Buick Century Special wagon. 214-SFI. 194k miles. Never gonna give you up, never gonna let you down. First documented LX9 swap in an A-body! Click here to read my build thread!
    Goldilocks: 1992 Buick Century Special sedan. 204-MFI. 116k miles. Will be mom's car soon.
    Susana: 1993 Buick Century Custom wagon. 204-MFI. 121k miles. Garage ornament. Waiting for... some fun!



  2. #122
    Senior Member turbokinetic's Avatar
    Join Date
    Dec 2007
    Location
    Northport, AL
    Vehicle
    1984 Buick Century Olympia 3.8SFI Turbo V6
    Posts
    5,699

    Default

    That's frustrating about the PCM failure. I am not too familiar with the OBDII stuff -- but some of them have a removable chip (internal flash memory) which can be changed over to another unit in similar way to the old stuff. Have you looked into this possibility?

    I'm sure you will like the peppy performance of the 3.33 ratio! It makes a difference!

  3. #123
    Senior Member Duke George V's Avatar
    Join Date
    Sep 2007
    Location
    Lost Wages
    Vehicle
    1996 Buick Century wagon, 1992 Buick Century sedan, 1993 Buick Century wagon
    Posts
    2,400

    Default

    I'm going to try a couple other things before I fully commit to a new computer. Cooling fan relays are cheap (free) from the yard, and there are a few A-bodies in the yard closest to my house. If that solves the cooling fan issue, it may be that I don't need a PCM. I will also deactivate reporting of some other things, like the cruise lamp and low oil lamp, in the tune file.

Page 9 of 9 FirstFirst ... 789

Posting Permissions

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