PotM GrandMarq.NET - Panther Headquarters Forum Index PotM
GMN Chat Room GMN's STORE!! GMN's Gallery Please!!
Results 1 to 6 of 6

Thread: 90 EFI SD swap to a TBI 84 Town car

  1. #1
    bigger is better over2tonsofFun's Avatar
    Join Date
    Nov 2007
    Location
    Laramie, WY
    Posts
    250

    Default 90 EFI SD swap to a TBI 84 Town car

    My wife's 84 Town car has been having transmission issues. Some slight engine issues.(burning oil) It maybe do to it sitting in a field for 5+ years.

    We have found a 90 Grand Marquis with front end damage ( mostly cosmetic) for a good price. We are thinking of getting it and swapping the Engine/transmission into my wife's car. So she could get an EFI car.

    Other than the big thing what would be needed to be swapped from the SD EFI to the TBI town car?

    Tim
    2000 Ford Crown Victoria
    84 Lincoln Town car signature, R.I.P
    85 Ford LTD Crown Victoria 2 door performance project
    89 Lincoln town car: RIP
    89 Crown Victoria LX 2002 USACi sound quality world champion RIP
    1990 Mercury Grand Marquis LS
    1994 Mercury Grand Marquis (sold)
    2004 Mercury Marauder. owned for a week then got screwed by the dealer

  2. #2
    Fastest Box In South Jersey 86VickyLX's Avatar
    Join Date
    Jan 2007
    Location
    Westmont, New Jersey
    Posts
    10,375

    Default

    Quote Originally Posted by over2tonsofFun View Post
    My wife's 84 Town car has been having transmission issues. Some slight engine issues.(burning oil) It maybe do to it sitting in a field for 5+ years.

    We have found a 90 Grand Marquis with front end damage ( mostly cosmetic) for a good price. We are thinking of getting it and swapping the Engine/transmission into my wife's car. So she could get an EFI car.

    Other than the big thing what would be needed to be swapped from the SD EFI to the TBI town car?

    Tim
    You need the ecm, the engine harness, the engine and trans being swapped would be the easiest thing. However, you will need to swap the 84 shift linkage onto the 90 trans, you will also need to get a 86-89 tv mounting bracket (part of the shift linkage that bolts to the outside of the trans, and lever unless it's the same on the 90+ I'm pretty sure the whole mounting set up changed when they went to cable shift.

    An EVTM for both your car and the 90 vic/grand marquis will be very very helpful.
    Throttle cable, TV cable and cruise control cables will be needed from the 90 as well.
    Realistically, you just need to hook up, key on power, crank power, ground. If your towncar has digital dash, you will need to add the fuel flow wire to pin 34 of the ecm harness, you can rob that from your original harness. You will also tie in the low oil pressure warning and coolant temp warning as well. You may need to swap the senders to your original application as they might be different depending on what set up the towncar has be it digital or analog instrumentation.

  3. #3
    I'm an air-conditioned gypsy gadget73's Avatar
    Join Date
    Jan 2005
    Posts
    39,278

    Default

    The 90 trans has some internal upgrades over the 84 one too, so thats another good reason to swap if it works properly. And yeah the shifter lever has to change, but thats not all that difficult.

    https://youtu.be/_6UX9itv1NM

    explains it easier than I can type out a bunch of stuff.


    I think the digital dash stuff is just idiot light on/off switches. Same oil pressure unit, 90 GM had a temp gauge tho so that has to change over.

    The start circuit is slightly different. 84 I believe is not part of the ECM harness, in 90 it connects in there somehow. Need an EVTM to figure out where the connection is. Entirely possible you can just splice them at the starter relay, not 100% on that. It will work if you don't connect the start circuit into the ECM but it will run funny on initial startup.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  4. #4
    bigger is better over2tonsofFun's Avatar
    Join Date
    Nov 2007
    Location
    Laramie, WY
    Posts
    250

    Default

    The plan was to do engine and trans swap. But on the drive home with it. My wife decided that we are going part out the Lincoln. Keep the Marq. Fix the front end.

    Click image for larger version. 

Name:	95128127_10217996837487576_7241418030465417216_n.jpg 
Views:	20 
Size:	101.1 KB 
ID:	54082

    She runs fantastic.

    Tim
    2000 Ford Crown Victoria
    84 Lincoln Town car signature, R.I.P
    85 Ford LTD Crown Victoria 2 door performance project
    89 Lincoln town car: RIP
    89 Crown Victoria LX 2002 USACi sound quality world champion RIP
    1990 Mercury Grand Marquis LS
    1994 Mercury Grand Marquis (sold)
    2004 Mercury Marauder. owned for a week then got screwed by the dealer

  5. #5
    I'm an air-conditioned gypsy gadget73's Avatar
    Join Date
    Jan 2005
    Posts
    39,278

    Default

    if the 90 is more solid, thats the easier choice. Rust level would mostly be my guide.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  6. #6
    bigger is better over2tonsofFun's Avatar
    Join Date
    Nov 2007
    Location
    Laramie, WY
    Posts
    250

    Default

    Only problem with the Grand Marquis is the header panel damage and the bad clearcoat. Minor problems with the windows. Nothing I can't handle.

    Tim
    2000 Ford Crown Victoria
    84 Lincoln Town car signature, R.I.P
    85 Ford LTD Crown Victoria 2 door performance project
    89 Lincoln town car: RIP
    89 Crown Victoria LX 2002 USACi sound quality world champion RIP
    1990 Mercury Grand Marquis LS
    1994 Mercury Grand Marquis (sold)
    2004 Mercury Marauder. owned for a week then got screwed by the dealer

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
GMN Approved Links!


www.rockauto.com www.adtr.net