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88 and 87 ecu's

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  • 88 and 87 ecu's

    Well i currently swapped a 1988 w Block VG30 into my maxima and it had a 1987 VG30 in it.

    Im having problems with it starting ....

    I replaced the injector's without testing the old ones that where in there...

    Once i put the 87 injectors into the engine i tested the 88 injector's that i took out and they where fine!!!

    Still once i put the 87 jectors in car still wouldent start...

    Would with starting fluid though...

    Then i took the 87 distrubtor tried that.. No Spark after that...

    And im about 99% sure its not the fuel pump because fuel get's up to the injectors fine....

    Maybe its the FPR????

    Maybe its the wiring harness ??? I see that the 88 engine has a extra 02 sensor that the 87 dident.... Up near the lower intake..

    Maybe the ecu fried ? A few things did spark when i was working on the car because i forgot to unhook the batt...

    I just bought a w block ecu.. the year is late 87...

    Do you think this will change any thing ?

    Is an 88 ecu any diffrent ?

  • #2
    They are not enough different to matter here.

    You should go back to basics. Test each component of combustion using logical thinking. You'll find it.
    http://z31performance.com/forum/viewtopic.php?f=5&t=147

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    • #3
      So that wouldent be the problem ?

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      • #4
        maybe im way off, maybe not. fuel getting to injectors, but have you checked pressure?
        1984 300zx Ae Turbo(under repair...)
        1989 240sx rb20(daily driver)

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        • #5
          if your fuel lines are tightened tight as hell you'll lose pressure and have a hell of a time starting.
          Lance 'never-ending 88na2t project' Landry
          I sell Z stuff when I'm not being lazy.
          Trace cell phones via GPS: http://www.phonetrace.org

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          • #6
            Well i dont have the lines tightend at all they are just on there....

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            • #7
              Lance wrote: if your fuel lines are tightened tight as hell you'll lose pressure and have a hell of a time starting.
              :? That just doesn't make any sense.

              Indigo, check your fusable links. They are in the black box next to the
              battery.You may have fried one.
              imagination is a virtue

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              • #8
                [quote]craZed wrote:
                Originally posted by Lance
                if your fuel lines are tightened tight as hell you'll lose pressure and have a hell of a time starting.:? That just doesn't make any sense.

                Indigo, check your fusable links. They are in the black box next to the
                battery.You may have fried one.
                Last motor swap I did was losing fuel pressure in the fuel lines not being clamped down super tight - and causing it not start, but it would start with starting fluid - poorly.
                Lance 'never-ending 88na2t project' Landry
                I sell Z stuff when I'm not being lazy.
                Trace cell phones via GPS: http://www.phonetrace.org

                Comment


                • #9
                  [quote]Lance wrote: [quote=craZed]
                  Originally posted by Lance
                  if your fuel lines are tightened tight as hell you'll lose pressure and have a hell of a time starting.:? That just doesn't make any sense.

                  Indigo, check your fusable links. They are in the black box next to the
                  battery.You may have fried one.
                  Last motor swap I did was losing fuel pressure in the fuel lines not being clamped down super tight - and causing it not start, but it would start with starting fluid - poorly.
                  Yes, that makes more sense.
                  If that were the case, then he would notice a big fuel leak?
                  imagination is a virtue

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                  • #10
                    it was harder to notice than I expected; there was no liquid fuel just a whistling noise (hard to hear when I had no exhaust on)
                    Lance 'never-ending 88na2t project' Landry
                    I sell Z stuff when I'm not being lazy.
                    Trace cell phones via GPS: http://www.phonetrace.org

                    Comment


                    • #11
                      Haha well i clamped down the lines and the batt is charging ... It dies so fast when you try to start it...


                      And another thing , When the plugs ar hard to pull out of the distrubtor does that mean any thing ?

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                      • #12
                        TheIndigo88 wrote: Haha well i clamped down the lines and the batt is charging ... It dies so fast when you try to start it...


                        And another thing , When the plugs ar hard to pull out of the distrubtor does that mean any thing ?
                        not that im aware of, but how old are they
                        1984 300zx Ae Turbo(under repair...)
                        1989 240sx rb20(daily driver)

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                        • #13
                          Do you have a FSM? If not you should grab one for a Z from carfish and look at the troubleshooting for car won't start, there's some good info there and I'm sure it's close enough to your car to be helpful...
                          Lance 'never-ending 88na2t project' Landry
                          I sell Z stuff when I'm not being lazy.
                          Trace cell phones via GPS: http://www.phonetrace.org

                          Comment


                          • #14
                            well the shop that i had the car in , It sparked when the stock 88 distributor was in they changed it any ways to my old 87 distributor and now it wont start with starting fluid and i cant get a spark by putting a bolt into the plug and touching it on the manifold...

                            And they dident put a mark where the old distributor was and i completely remembering the distrubtor being adlined in the complete middle and nows its like all the way to the right...

                            Comment


                            • #15
                              put the 88 distributor back in.....

                              Only things left are maybe not enough contact's on the grounds...

                              Engine harness...

                              ECU Maybe fried or just not compatable...we will see when i recive the 87 W block 300zx ecu ....

                              Sparkplugs ?? Even though they are new Bosch plats right from autozone new!!!

                              Or maybe i just suck at life ?

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