Bringing TBI and Multi Port Fuel Injection to a New Level.     EFI Conversions and Tuning! Seattle to Portland! E-mail Tuning Consultant!
Page 2 of 5 FirstFirst 12345 LastLast
Results 16 to 30 of 65

Thread: 1227747 to 16197427 Conversion PCM Swap with Wiring Pinout Directions!

  1. #16
    Fuel Injected! gregs78cam's Avatar
    Join Date
    May 2011
    Location
    N. Idaho
    Posts
    762
    Sounds like that book has some good info in it. It there anything in there that could make sense of this trans datastream portion of the hac?

    Code:
    L53F3    FDB $0010      ; 11,  MALFFLG6, ERROR WD 6
                        ;
                        ; b7 1 = ERR 57. (not used)
                        ; b6 1 = ERR 58, XMISH TEMP HI
                        ; b5 1 = ERR 59, XMISH TEMP LOW
                        ; b4 1 = ERR 61, TURBO BOOST SENSOR HI
                        ;
                        ; b3 1 = ERR 62, TURBO BOOST SENSOR LOW
                        ; b2 1 = ERR 63, BARO SENSOR HI
                        ; b1 1 = ERR 64, BARO SENSOR LOW
                        ; b0 1 = ERR 65. (not used)
                        ;-----------------------------
    L53F5    FDB $001B      ; 12, CURMALF5, CURRENT ERROR WD 6
                        ;
                        ; b7 1 = ERR 57. (not used)
                        ; b6 1 = ERR 58, XMISH TEMP HI
                        ; b5 1 = ERR 59, XMISH TEMP LOW
                        ; b4 1 = ERR 61, TURBO BOOST SENSOR HI
                        ;
                        ; b3 1 = ERR 62, TURBO BOOST SENSOR LOW
                        ; b2 1 = ERR 63, BARO SENSOR HI
                        ; b1 1 = ERR 64, BARO SENSOR LOW
                        ; b0 1 = ERR 65. (not used)
                        ;-----------------------------
    I was thinking it might be something used in the diesel engine TCM.

    Can you shed any more info on any unlisted I/O pins?
    1978 Camaro Type LT, 383, Dual TBI, '7427, 4L80E
    1981 Camaro Z-28 Clone, T-Tops, 350/TH350
    1981 Camaro Berlinetta, V-6, 3spd
    1974 Chevy/GMC Truck, '90 TBI 350, '7427, TH350, NP203, 6" lift, 35s

  2. #17
    Vintage Methane Ejector
    Join Date
    Apr 2011
    Posts
    194
    Nothing about diesel engines, the new book is the S/T Driveability & Emissions Manual. I've woundered about those too.

    Here's what I've got so far:
    Attached Files Attached Files

  3. #18
    EFI GearHead ! EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    59
    Posts
    10,477
    Looks like that transmission code was also used in a diesel application. Im my LT1 it is simalar to these PCM that it has engine data and transmission data although I have them in same adx, need to change connection and montitor. Transmission data also shows some engine data and all error codes.

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  4. #19
    EFI GearHead ! EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    59
    Posts
    10,477
    Quote Originally Posted by 93V8S10 View Post
    Also, found out that B1 is for the DIS system used with the 2.2L. It is called the 1X Signal, and is used for ASDF (Alternate Synchronous Double Fire).
    So when is the DIS hac coming out for V8?

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  5. #20
    Fuel Injected! JeepsAndGuns's Avatar
    Join Date
    Sep 2011
    Location
    alabama
    Age
    37
    Posts
    1,675
    Quote Originally Posted by EagleMark View Post
    So when is the DIS hac coming out for V8?
    I havent forgotten or abandoned the northstar DIS we talked about a couple months ago. Once I get my MPFI installed and tuned, DIS comes next.
    So I'm intrested in DIS info too.
    79 Jeep Cherokee, AMC 401, T-18 manual trans, hydroboost, 16197427 MPFI system---the toy

    93 Jeep YJ Wrangler, 4.0L, 5 speed, 8.8 rear, homebrew hub conversion and big brakes, hydroboost, 2.5in OME lift, 31x10.50's---the daily driver

    99 Jeep WJ Grand Cherokee limited, 4.0L, auto, 2wd, leather and power everything, 99% stock---the long distance highway ride.

  6. #21
    Administrator
    Join Date
    May 2011
    Location
    Lakes Region, NH
    Age
    50
    Posts
    3,234
    Very interesting that GM found ASDF to produce cleaner emissions in the S10. In some masks ASDF is a function of IPW to prevent commanded on times less than injector is capable of and is implemented without 1X signal. In these cases ASDF is not implemented during most operating conditions. It's noteworthy that GM resorted to hardware solution in 7427. I'd love to have more time to investigate the hardware relationship between the 1X input pin, memcal configuration, and limp mode fueling.

    The list of unused pins has been pretty consistent in all of the models I've looked at. A11,A13, B6,B7, B11, B14, E7, F4,F5. Checking multpile vehicles to see if this list can be shortened might be a worthwhile approach.

  7. #22
    Vintage Methane Ejector
    Join Date
    Apr 2011
    Posts
    194
    Quote Originally Posted by EagleMark View Post
    So when is the DIS hac coming out for V8?
    LOL, way over my head.


    A13 is the A/C high Pressure Switch
    E7 is AIR Bypass Control
    I'm still uncertain about whether B7 can be used for the underhood ESC.

    I'd bet on B11 or B14 being VATS.
    Last edited by 93V8S10; 02-14-2012 at 05:30 PM.

  8. #23
    Fuel Injected! one92rs's Avatar
    Join Date
    Apr 2011
    Posts
    173
    now the vats deal would be cool. since i have it in a 92 camaro it would be cool to have it wired up as well.

  9. #24
    Fuel Injected!
    Join Date
    Mar 2012
    Posts
    59
    We should update the GIF on the front page to t he revised version found here: http://www.thirdgen.org/techboard/po...82-post40.html

    Notably, the P/N switch is updated. I've been beating my head against a wall because my IAC isn't working right. Because I don't have the wire hooked up, because it was not on the sheet. It was not grounded so it thought it was in drive and would not do the pintle thing.

  10. #25
    EFI GearHead ! EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    59
    Posts
    10,477
    Thank you and done!

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  11. #26
    Administrator
    Join Date
    May 2011
    Location
    Lakes Region, NH
    Age
    50
    Posts
    3,234
    I have checked the pinout on the first page and cross checked factory pinouts from C/K and S/T vehicles using the same PCM family with manual transmissions. I see no park/neutral switch input or grounded signal wire listed in the OEM diagrams. Also, the two factory diagrams I have show both VSS and trans speed signals connected to the pcm in manual trans applications.

    Does anyone have confirmation of P/N input on E5, or of the results of not including the VSS / trans speed signal on F13?
    Thanks
    Last edited by 1project2many; 08-12-2012 at 09:04 PM.

  12. #27
    Super Moderator Six_Shooter's Avatar
    Join Date
    Feb 2011
    Posts
    2,890
    The '7427 does not use a nuetral safety switch input.

    What it does use is the gear select inputs to determine what gear the trans shifter is in. I don't remember the combination of on's and off's of those three inputs to detect what gear is selected, but I know it's in some of the EFI manuals from OTC and Snap On IIRC.
    The man who says something is impossible, is usually interrupted by the man doing it.

  13. #28
    Administrator
    Join Date
    May 2011
    Location
    Lakes Region, NH
    Age
    50
    Posts
    3,234
    Right. Whoops... this was specifically related to manual trans applications. Previous post edited for clarity. :)

  14. #29
    Super Moderator dave w's Avatar
    Join Date
    Feb 2011
    Posts
    4,260
    Quote Originally Posted by 1project2many View Post
    Does anyone have confirmation of P/N input on A5, or of the results of not including the VSS / trans speed signal on F13?
    Thanks
    On my '427 PCM schematics, A5 is Distributor Reference Low (Ground). I personally don't like the idea of grounding the P/N wire to Ground. On the '7747 to '427 PCM conversions I've done, I covered the P/N wire with heat shrink tubing and zipped tied the P/N wire to the harness.

    The challenge I see to using a '427 PCM without a VSS is being able program which Spark / Fuel tables (Near Idle / Off Idle) for the PCM to use. I'm thinking without a VSS input, the '427 PCM will always think the vehicle speed is ZERO MPH. The '427 PCM could be programmed to switch from near idle / off idle, Spark / Fuel tables by TPS% only? I've never tried using TPS% only programming on the '427.

    dave w

  15. #30
    Administrator
    Join Date
    May 2011
    Location
    Lakes Region, NH
    Age
    50
    Posts
    3,234
    The pin in question was E5. Range switch C. I need a better proofreader. :(

    On the '7747 to '427 PCM conversions I've done, I covered the P/N wire with heat shrink tubing and zipped tied the P/N wire to the harness.
    That matches the manual trans wiring diagrams.

    Those diagrams also show two signals from the DRAC. One is VSS and one is trans speed. The "possible symptom" for a faulty trans speed signal on F13 is "fuel cut." I have a 4k ppm VSS signal to supply. I do not have a 40 pulse/revolution trans speed signal.

Similar Threads

  1. '71 Chev pick up 4L60E swap.
    By Six_Shooter in forum Gear Heads
    Replies: 13
    Last Post: 12-12-2013, 07:28 PM
  2. 1962 Suburban Engine and EFI swap.
    By Six_Shooter in forum Gear Heads
    Replies: 9
    Last Post: 10-25-2011, 03:15 AM
  3. Lucky's '96 Mustang DOHC Swap
    By Lucky in forum Gear Heads
    Replies: 19
    Last Post: 06-12-2011, 01:47 PM
  4. Fuel Pump Relay Wiring
    By EagleMark in forum GM EFI Systems
    Replies: 3
    Last Post: 06-04-2011, 10:52 PM

Tags for this Thread

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
  •