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    Gtx ECU?

    I finally got my hands on a GTX ECU. I'm running my na escort gt ecu and wire harness. Is it just a straight plug and play, to swap the ecu's? And what about the NA harness, witch has a 3 wire TPS senor thats either off or on with no percentage. Is there anything that I have to chage, or get the GTX harness? Whats is the rev limit on the GTX ecu? Will I loose hp now? With the NA ecu i've ran a 9.4 at the local track thats an 8th of a mile. I was told by a friend that the reason my car is so quick is because my NA Ecu is running wide open with no limits and dumping a lot of fuel.

    #2
    Its a plug nad play. What in jectors do you have? If you have GTX's it will run like a factory turbo car, if you have the smaller ones then it wont run 100%.
    BP-05 Turbo-Sold
    2004 MK4 AWP Jetta GLI

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      #3
      BP26 redline is 7000rpm
      BP55 redline is 6500rpm
      2006 Mazda 3 hatchback manual

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        #4
        I have thte gtx injectors. what about the TPS and knock sensors?

        Originally posted by elscotto80
        Its a plug nad play. What in jectors do you have? If you have GTX's it will run like a factory turbo car, if you have the smaller ones then it wont run 100%.

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          #5
          TPS on an auto gt is 4wire if you can find them, as for the the knock you could just find any I believe. When you do get these I believe you'll have to change the pinouts a bit. Other than that, na harness gtx ecu = pnp

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            #6
            I can get you the pinouts for changing the knock sensor. if need be
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            1992- project FE3..... 313 WHP @ 9.3psi




            I pet my dash when I get into the car..."good car"
            he actually has a mazda tree, parts grow on it

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              #7
              ok, cool

              Originally posted by bpt323
              I can get you the pinouts for changing the knock sensor. if need be

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                #8
                How will the car run if I don't change the TPS and knock sensor? Can I use the harness from an auto 1.9 or does it have to be an auto 1.8 harness?

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                  #9
                  I run mine without the auto tps and no knock sensor. I do not have any problems and I have it dyno tuned. The 1.9 escort harness is not the same as the 1.8 harness, the 1.9 is a ford, the 1.8 is Mazda.
                  BP-05 Turbo-Sold
                  2004 MK4 AWP Jetta GLI

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                    #10
                    Will i notice any horse power loss, or speed cut? With the NA ecu, I hit well over 120mph on the freeway.

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                      #11
                      you'll notice you can boost higher and most likely will have better fuel maps with the gtx ecu.

                      and stop hitting well over 120mph on the freeway unless the next time its into a tree so you don't endanger everyone else who might be driving.
                      Seth
                      2010 Mazda3 i Touring

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                        #12
                        w/o the sensor it retards your timing by 1 degree... nothing you should worry about unless you want to.

                        So long as its a JDM ecu there wont be a speed cut AFAIK.
                        The T3 BP MX-3 conversion has begun, and is taking forever & will kill me.

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                          #13
                          i am running the gtx ecu on a 3 wire tps, and no knock sensor.

                          i have some issues (none driveability). The car drives great just likes to... for lack of a better word... miss... when im at full boost with a big load (going up a hill or low in the rpms wot in 2-3-4-5 gears) .

                          other than that if i keep it at like 90% or so (i know the 3 wire is just an on off switch) i still move like a bat outta hell and i dont encounter the problem.

                          i have right now awaiting install, a gtx, rebuilt tranny, and a jdm harness... (im kinda looking for a straight bodied car to put it all in). im going to pick up the knock sensor and controller off a turbo 626 from the junk yard, and i have the 4 wire gtx t/b.

                          i have heard something along the lines the na ecu pulles harder top end because the timing retards or something like that w/ the gtx. but the gtx is a safer ecu to run and build your setup on.... if you got it though put it in and you tell us
                          There are no stupid questions, just stupid people.

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                            #14
                            What exactly do you mean by "non driveability". And where did iyou get your jdm wire harness from?

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                              #15
                              non driveability i mean, it drives just fine... like a factory car, i never have any no start issues, any idle issues nothing, there is still some tuning (unsure if its a mechanical motor issue or a fuel issue, with the whole missing thing... but its not the ecu for sure, it drove great when installed the misfire thing only started recently and is completely unrelated)

                              i got the wire harness from a dude trying to sell it on the forum FOREVER he wanted like 500cad or something and i ended up getting it for 215cad shipped! i would not worry about a jdm wire harness unless you run the gtx, if you are just running a bpt just run the usdm harness. because there are some connectors in different locations on each setup.

                              the car drives great with it i cannot complain, its fun getting my car out on the dry roads (like the first day in over a month litterally) and being able to burn up second bouncing off the rev limiter with a quick shift from first a far cry from my struggling to bounce off the rev limiter in first with a dump of the clutch with my revs up without the turbo

                              just plug it in, advance your timing a tad to make up for the "limp mode" that the ecu is in without the knock sensor, and your golden.

                              i will say this though i have had 0 motor issues and my cousin whom i sold one of my turbo setups to has blown up 2 motors on his na ecu, given they were more driver error than specifically the ecu (timing WAY too advanced) then he just rebuilt the motor without a machine shop involved and something about mating parts from 2 old motors that were sitting on the side of my house for a year without replacing bearings or any recurfacing of bearing surfaces, the second motor was doomed from the start.
                              There are no stupid questions, just stupid people.

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