PCM after engine swap...CASE relearn???

  1. Welcome to GM Inside News Forum – General discussion forum for GM

    Welcome to GM Inside News Forum - a website dedicated to all things GM.

    You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, Join GM Inside News Forum today!
     
+ Reply to Thread
Page 1 of 2 12 LastLast
Results 1 to 15 of 20

Thread: PCM after engine swap...CASE relearn???

  1. #1
    2.4 Liter SIDI ECOTEC
    Join Date
    Nov 2006
    Posts
    169
    Thanks
    0
    Thanked 1 Time in 1 Post

    PCM after engine swap...CASE relearn???

    I swapped an engine into my car. The only thing that has changed is the fact that the donor engine has a new crankshaft position sensor and is still using its old harmonic balancer. I did not change anything PCM related.

    Do I still need to do a CASE relearn procedure?

    Thanks!
    Buying a Suburban Z71...

  2. Remove Advertisements
    GM Inside News
    Advertisements
     

  3. #2
    2.8 Liter Turbocharged V6 dr.gizmo's Avatar
    Join Date
    Jun 2006
    Location
    Chicago suburbs
    Posts
    770
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: PCM after engine swap...CASE relearn???

    Yes, any time the crank sensor is disturbed you need to do a CKP relearn, I'd say swapping an engine would most definitely count.
    30 Year Gm Dealer Tech.
    GM World Class Tech with 9 certs.
    ASE Master with L1; 12 certs. total

  4. #3
    2.4 Liter SIDI ECOTEC
    Join Date
    Nov 2006
    Posts
    169
    Thanks
    0
    Thanked 1 Time in 1 Post

    Re: PCM after engine swap...CASE relearn???

    Quote Originally Posted by dr.gizmo View Post
    Yes, any time the crank sensor is disturbed you need to do a CKP relearn, I'd say swapping an engine would most definitely count.
    It does run well, but gas mileage is not all that great.

    Have you ever experienced a time when a CASE relearn screws up something? Just curious.
    Buying a Suburban Z71...

  5. #4
    2.8 Liter Turbocharged V6 dr.gizmo's Avatar
    Join Date
    Jun 2006
    Location
    Chicago suburbs
    Posts
    770
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: PCM after engine swap...CASE relearn???

    No, I have done many hundreds of CKP relearns and never had a problem because of it. Not running it can cause idle and performance troubles.
    30 Year Gm Dealer Tech.
    GM World Class Tech with 9 certs.
    ASE Master with L1; 12 certs. total

  6. #5
    5.3 Liter Vortec V8 boston boy's Avatar
    Join Date
    Dec 2005
    Location
    boston
    Posts
    1,327
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: PCM after engine swap...CASE relearn???

    Quote Originally Posted by dr.gizmo View Post
    No, I have done many hundreds of CKP relearns and never had a problem because of it. Not running it can cause idle and performance troubles.
    How do you relearn that thingy? I like to learn new thingys
    toyota hondaimports
    VIVA PORTUGAL

  7. #6
    2.4 Liter SIDI ECOTEC
    Join Date
    Nov 2006
    Posts
    169
    Thanks
    0
    Thanked 1 Time in 1 Post

    Re: PCM after engine swap...CASE relearn???

    Quote Originally Posted by boston boy View Post
    How do you relearn that thingy? I like to learn new thingys
    Got it done yesterday. Basically, someone with an OBD computer that is capable of doing the CASE relearn is all that's needed for the relearn. Not any OBD scanner will do, as most are just that: scanners. They do not have the more advanced datastream capabilities in order to communicate with your car's powertrain PCM.
    Buying a Suburban Z71...

  8. #7
    6.2 Liter LS9 Supercharged V8 2002 Caddy's Avatar
    Join Date
    May 2007
    Posts
    8,904
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: PCM after engine swap...CASE relearn???

    Can only be done by a GM dealer with a Tech II...
    Proposed Cadillac Tag Lines...
    GM's "Back to the Future" Division,
    GM's Deja Vu Division,
    Cadillac is Truck.
    Cadillac is Cadence!
    Cadillac, you have to crawl before you walk,
    Cadillac V8? Whats a V8?
    Cadillac, the potential of mixed feelings!
    The New Cadillac Flagship: The Chevy Corvette.
    Proposed Volt Tag Line..
    People who don't like the Volt haven't driven one, and
    People who hate the Volt listen to too much talk radio.

  9. #8
    2.4 Liter SIDI ECOTEC
    Join Date
    Nov 2006
    Posts
    169
    Thanks
    0
    Thanked 1 Time in 1 Post

    Re: PCM after engine swap...CASE relearn???

    Quote Originally Posted by 2002 Caddy View Post
    Can only be done by a GM dealer with a Tech II...
    Huh? I just got it done at a local mechanic who had an OTC Genesis II.
    Buying a Suburban Z71...

  10. #9
    6.2 Liter LS9 Supercharged V8 2002 Caddy's Avatar
    Join Date
    May 2007
    Posts
    8,904
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: PCM after engine swap...CASE relearn???

    Wow, thats news to me... I'm pretty sure this can only be done on GM cars with a Tech II... Are you sure he did it? Most of the "third party" scanners can only read the PCM, they can't write to it.
    Proposed Cadillac Tag Lines...
    GM's "Back to the Future" Division,
    GM's Deja Vu Division,
    Cadillac is Truck.
    Cadillac is Cadence!
    Cadillac, you have to crawl before you walk,
    Cadillac V8? Whats a V8?
    Cadillac, the potential of mixed feelings!
    The New Cadillac Flagship: The Chevy Corvette.
    Proposed Volt Tag Line..
    People who don't like the Volt haven't driven one, and
    People who hate the Volt listen to too much talk radio.

  11. #10
    2.4 Liter SIDI ECOTEC
    Join Date
    Nov 2006
    Posts
    169
    Thanks
    0
    Thanked 1 Time in 1 Post

    Re: PCM after engine swap...CASE relearn???

    Quote Originally Posted by 2002 Caddy View Post
    Wow, thats news to me... I'm pretty sure this can only be done on GM cars with a Tech II... Are you sure he did it? Most of the "third party" scanners can only read the PCM, they can't write to it.
    No, I did it for sure. I've done it about 3 times; twice using a Snap-On tool, and this time using the Genesis OTC tool. You are correct, as I mentioned in my last post, that 3rd party scanners mostly cannot write to the PCM; they can only read it. But most of the higher end ones from Snap-On or Genesis can write the PCM; this is why usually I have to go searching for a mechanic who actually has a scanner that can write the PCM.

    I actually stood there when the mechanic was doing it. It did actually write the PCM, and when the CASE learn procedure was done, it said "CASE learn procedure complete". So it did it for sure. Also, I'm getting a bit better gas mileage now.
    Buying a Suburban Z71...

  12. #11
    6.2 Liter LS9 Supercharged V8 2002 Caddy's Avatar
    Join Date
    May 2007
    Posts
    8,904
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: PCM after engine swap...CASE relearn???

    Do you know what other functions this scanner can do? There are lots of us in the Caddy community who are looking for a "reasonably" priced scanner for our cars... We have a high end snap-on one at work I will have to borrow it to see what it can do...

    Do you know if your scanner can talk to the BCM too? reprogram Key Fobs? Theft lock on the radios? Name in the "wake up display in the dash?"

    Tech II's normally run about $4000-4500... plus you need a gm tech to install all of the latest patches from GM HQ
    Proposed Cadillac Tag Lines...
    GM's "Back to the Future" Division,
    GM's Deja Vu Division,
    Cadillac is Truck.
    Cadillac is Cadence!
    Cadillac, you have to crawl before you walk,
    Cadillac V8? Whats a V8?
    Cadillac, the potential of mixed feelings!
    The New Cadillac Flagship: The Chevy Corvette.
    Proposed Volt Tag Line..
    People who don't like the Volt haven't driven one, and
    People who hate the Volt listen to too much talk radio.

  13. #12
    454
    454 is offline
    3.6 Liter SIDI V6 454's Avatar
    Join Date
    Jul 2005
    Posts
    1,186
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: PCM after engine swap...CASE relearn???

    Quote Originally Posted by 2002 Caddy View Post
    Do you know what other functions this scanner can do? There are lots of us in the Caddy community who are looking for a "reasonably" priced scanner for our cars... We have a high end snap-on one at work I will have to borrow it to see what it can do...

    Do you know if your scanner can talk to the BCM too? reprogram Key Fobs? Theft lock on the radios? Name in the "wake up display in the dash?"

    Tech II's normally run about $4000-4500... plus you need a gm tech to install all of the latest patches from GM HQ
    HPTuners is a scanner/tuner which allows you to change timing, speed limiters, fueling, etc. It's big in the 3800 community and I'm pretty sure it will work on your application.

  14. #13
    5.3 Liter Vortec V8 boston boy's Avatar
    Join Date
    Dec 2005
    Location
    boston
    Posts
    1,327
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: PCM after engine swap...CASE relearn???

    Quote Originally Posted by 454 View Post
    HPTuners is a scanner/tuner which allows you to change timing, speed limiters, fueling, etc. It's big in the 3800 community and I'm pretty sure it will work on your application.
    But I think HPtuner are good for a couple of VIN numbers. I'm not positive so don't rip me a new one. Those HPtuners are sick if you have a GTP motor. I read alot on those from GTP forums. ZZP parts & hptuner = masive power

    PS: thanks for the teaching me guys too
    toyota hondaimports
    VIVA PORTUGAL

  15. #14
    1.8 Liter ECOTEC
    Join Date
    Nov 2007
    Location
    Metro Detroit
    Posts
    59
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: PCM after engine swap...CASE relearn???

    Quote Originally Posted by 2002 Caddy View Post
    There are lots of us in the Caddy community who are looking for a "reasonably" priced scanner for our cars...
    I'm waiting for someone to come out with some software and an adapter for OBDII for a laptop that can perform bi-lateral communications so you can control output functions for EVAP tests, power balance, & ABS BCM etc... without spending $1000's on scan tool.

  16. #15
    454
    454 is offline
    3.6 Liter SIDI V6 454's Avatar
    Join Date
    Jul 2005
    Posts
    1,186
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: PCM after engine swap...CASE relearn???

    Quote Originally Posted by boston boy View Post
    But I think HPtuner are good for a couple of VIN numbers. I'm not positive so don't rip me a new one. Those HPtuners are sick if you have a GTP motor. I read alot on those from GTP forums. ZZP parts & hptuner = masive power

    PS: thanks for the teaching me guys too
    I have a DHP PowrTuner and I can tune any car I want thats compatible with it as many times as i please. PowrTuner is another good tuner/scanner but i think its only for OBDII V6 GMs until ~2004. The trick with HPTuners is that you need to buy a credit for each car that you plan to tune. So if you only plan on doing your own car, there's not much to it. But as you say, its very beneficial to the L67 cars since we need to constantly scan for knock and fuel trims when dropping pulley sizes so we dont chip any pistons.
    Last edited by 454; 08-30-2009 at 02:27 AM.

  17. Remove Advertisements
    GM Inside News
    Advertisements
     

Quick Reply Quick Reply

Register Now

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Thread Information

Users Browsing this Thread

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

Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Powered by vBadvanced CMPS v4.1.2