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Gtx swap, 93 Escort Gt? Help.

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    Gtx swap, 93 Escort Gt? Help.

    I swap a 1.8 bpt Gtx engine into my 93 escort gt. I'm having some small issues, I was wondering if anyone could help me out? This is my setup:

    Gtx engine
    Front mount intercooler (mitsubishi starion)
    3" downpipe
    3" exhaust
    3" muffler
    waldro 255 inline fuel pump
    vortech fuel pressuer regulator 6-1 ratio
    stock escort gt ECU
    Hks mushroom filter
    Greddy type-s bov
    NKG Iruidem spark plugs
    soon to be install Apex S-AFC II

    Problems that I'm having:

    High Idle- I've tightened the throttle all the way down, and it still idles high.
    The temp gauge never moves to the middle after the engine is warm. It go's up a little past the C and stops.

    Boost- I'm boosting 15psi, and I don't know why. I haven't found any vaccum leaks or anything. I know the the stock boost is set around 7psi. So, did the boost go up becase of the larger intercooler, downpipe and exhaust? (more efficent) Or could there be something wrong with the internal wastegate? I even hooked up a line pressure gauge pumped it up, and it stoped at 15lbs on the gauge.

    Fuel- The car runs super rich. Sounds like I have cams. But I think the S-Afc II will take care of this issue.

    #2
    replaced the coolant temp sensor? If its bad, and it thinks the motor is always cold, it could cause a higher warm up idle to go longer than the normal warmup time.
    The T3 BP MX-3 conversion has begun, and is taking forever & will kill me.

    Comment


      #3
      The high boost is because of your exhaust - the vj20 is known for this boost creep.

      If you are using the 330cc (GTX) injectors AND an FMU you will run rich. The 330s should be at their limit at 15 psi but still hold without an FMU.

      I have the same problem with my temperature gauge. My cars idle is fine however.

      Comment


        #4
        All my IC pipping is secured.
        Wastegate actuator, can you show me a pic?
        Last edited by Fritz360; 06-30-2005, 06:41 PM.

        Comment


          #5
          trace your wastegate vacuum line to a cylinder type object attached to the turbo.

          Comment


            #6
            Originally posted by Fritz360
            Wastegate actuator, can you show me a pic?
            looks like the attached pic....my wastegate doenst seem to work like it should either....i run 15psi but it takes it no problem...
            Attached Files
            91 323 GTX @ 16psi, 5 speed || December 07 R.O.T.M.
            Powered by MegaSquirt I PCB3, Tuned by Lex

            More Information

            Comment


              #7
              Im not sure about this - is the wastegate actuator arm on the vj20 threaded and therefore adjustable?

              Comment


                #8
                Originally posted by Lex
                Im not sure about this - is the wastegate actuator arm on the vj20 threaded and therefore adjustable?
                no
                91 323 GTX @ 16psi, 5 speed || December 07 R.O.T.M.
                Powered by MegaSquirt I PCB3, Tuned by Lex

                More Information

                Comment


                  #9
                  Okay, in that case, I am sure that Fritz 360 is experiencing boost creep because of the 3 inch exhaust

                  Comment


                    #10
                    Originally posted by Lex
                    Okay, in that case, I am sure that Fritz 360 is experiencing boost creep because of the 3 inch exhaust
                    Oh, duh. Ok I know what thats is. Yes I did check that. I but a hose clamp on the line already.

                    Comment


                      #11
                      Originally posted by Fritz360
                      Oh, duh. Ok I know what thats is. Yes I did check that. I but a hose clamp on the line already.

                      I'm sorry, I don't see how that is relevant to my reply in any way ... nor do I really understand what you mean. Boost creep is not due to the lack of clamps. It is due to a wastegate opening that is not efficient enough to maintain the intended boost on a free flowing exhaust system.

                      To remedy it, either port the wastegate or revert back to a smaller exhaust.

                      Comment


                        #12
                        Originally posted by Lex
                        I'm sorry, I don't see how that is relevant to my reply in any way ... nor do I really understand what you mean. Boost creep is not due to the lack of clamps. It is due to a wastegate opening that is not efficient enough to maintain the intended boost on a free flowing exhaust system.

                        To remedy it, either port the wastegate or revert back to a smaller exhaust.
                        I was told by corksport that, there was not enough back pressure for the wastegate to work like its suppose to. And that I should get a smaller exhaust, but that's easier said than done.

                        Comment


                          #13
                          oh jeez... who at corksport told you, that there was not enough back pressure?
                          The T3 BP MX-3 conversion has begun, and is taking forever & will kill me.

                          Comment


                            #14
                            Originally posted by Fritz360
                            I was told by corksport that, there was not enough back pressure for the wastegate to work like its suppose to. And that I should get a smaller exhaust, but that's easier said than done.
                            who gives a ****....i run 2.5" intake and exhaust with a nice big FMIC and i run 15psi with no problems...just enjoy it
                            91 323 GTX @ 16psi, 5 speed || December 07 R.O.T.M.
                            Powered by MegaSquirt I PCB3, Tuned by Lex

                            More Information

                            Comment


                              #15
                              Thanks for the help, the reason i asked about the boost is because I didn't want to blow my engine!

                              Comment

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