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  • 97 GL dyno

    current mods consist of cool air intake, 2.5in custom bent exhaust, aeromotive adjustable fuel pressure regulator set to 40psi, FR wires, MSD coil pack.

    TZT Performance http://www.tztperformance.com/
    officially a troll. '93 3000GT VR4 #2229/2595

    '00 Black SVTC - sold 5/1/10
    '97 GL Turbo Zetec - gone

  • #2
    Originally posted by striker2 View Post
    current mods consist of cool air intake, 2.5in custom bent exhaust, aeromotive adjustable fuel pressure regulator set to 40psi, FR wires, MSD coil pack.
    Need to fix that A/F.
    2008 Mazdaspeed3 Sport "The Angry Goose"
    1979 Mazda Rx7
    2000 SUPERCHARGED Ford Contour Zetec- sold 10/20/05

    Comment


    • #3
      yeah but i dont have access to the school dyno anymore so im not sure how im gonna go about doing that. if i knew exactly what caused it then i might be able to fix it without the dyno.
      TZT Performance http://www.tztperformance.com/
      officially a troll. '93 3000GT VR4 #2229/2595

      '00 Black SVTC - sold 5/1/10
      '97 GL Turbo Zetec - gone

      Comment


      • #4
        What type of fuel were you running? Premium unleaded would smooth out the graph a bit more.
        1995 Contour GL, Zetec, ATX, 118k - Sold
        2012 Mitsubishi Lancer GT, 2.4L, CVT and it begins again.

        Comment


        • #5
          i was just running straight shell 87 octane
          TZT Performance http://www.tztperformance.com/
          officially a troll. '93 3000GT VR4 #2229/2595

          '00 Black SVTC - sold 5/1/10
          '97 GL Turbo Zetec - gone

          Comment


          • #6
            Your so lucky that you can use the schools dyno. Impressive numbers, it just means my 4 cylinder is alot slower than I thought.
            "Do what you like, Because you have to drive it!"-Me
            03 Mustang Cobra Convertible # 476 out of 5,082
            93 Cobra
            01 Lightning
            99 LX Contour - Sold 2/23/09

            Comment


            • #7
              Originally posted by KerryKool View Post
              What type of fuel were you running? Premium unleaded would smooth out the graph a bit more.
              Definitely a tuning issue.
              2008 Mazdaspeed3 Sport "The Angry Goose"
              1979 Mazda Rx7
              2000 SUPERCHARGED Ford Contour Zetec- sold 10/20/05

              Comment


              • #8
                Yikes! At least bump your FPR up 5psi. It even looks like your power dips when your AFR peaks around 3700rpm.

                Do you have any kind of data logger? Your fuel trims are probably maxed out.

                HTH,
                BP
                --'96 GL * MTX Zetec-- SOLD! 3-12-2011
                --- '06 Mazda 6s * 3L Duratec * 6-speed ATX * Lapis Blue ---
                FOR SALE >> T3 Super 60 Turbo - Coated Focus Manifold - 42# FRPP Injectors - Focus CFM Throttle Body << FOR SALE (PM me)

                Comment


                • #9
                  i do not have any kind of datalogger. however when i looked at long term fuel trim after installing the FPR it actually showed the PCM taking away fuel.

                  as for tuning i would say that yeah its a tuning issue cause i have no tune. its a completly stock pcm
                  TZT Performance http://www.tztperformance.com/
                  officially a troll. '93 3000GT VR4 #2229/2595

                  '00 Black SVTC - sold 5/1/10
                  '97 GL Turbo Zetec - gone

                  Comment


                  • #10
                    You have to watch out though. The Long Term Fuel Trim is opposite from the short term. It's weird. A positive STFT means that you are running lean (it's adding fuel.) BUT a negative LTFT also means that you're running lean. I don't know why it works that way. Kinda funky.

                    See if you can find a local CEG'er with some decent data logging software.

                    BTW, did you move back south yet?


                    BP
                    --'96 GL * MTX Zetec-- SOLD! 3-12-2011
                    --- '06 Mazda 6s * 3L Duratec * 6-speed ATX * Lapis Blue ---
                    FOR SALE >> T3 Super 60 Turbo - Coated Focus Manifold - 42# FRPP Injectors - Focus CFM Throttle Body << FOR SALE (PM me)

                    Comment


                    • #11
                      actually i do believe that a negative LTFT means its rich and is trying to make it leaner. and STFT doesnt mean anything really.

                      as for moving back to Kentucky, thats this weekend.
                      TZT Performance http://www.tztperformance.com/
                      officially a troll. '93 3000GT VR4 #2229/2595

                      '00 Black SVTC - sold 5/1/10
                      '97 GL Turbo Zetec - gone

                      Comment


                      • #12
                        after thinking about it i suspect a dying fuel pump is the main cause for the A/f ratio problem. when i tested the flow i was only getting about 8oz in 30 seconds. the pump doesnt hold residual pressure anymore either so im looking at replacing it with a walbro gss317 unit. unless you guys have a better pump suggestion.
                        Last edited by striker2; 09-18-2006, 03:34 PM.
                        TZT Performance http://www.tztperformance.com/
                        officially a troll. '93 3000GT VR4 #2229/2595

                        '00 Black SVTC - sold 5/1/10
                        '97 GL Turbo Zetec - gone

                        Comment


                        • #13
                          ok so i upped the FPR to 45 psi on monday. last night my check engine light came on. check the codes this morning and its a P0172 - system too rich. what gives?
                          TZT Performance http://www.tztperformance.com/
                          officially a troll. '93 3000GT VR4 #2229/2595

                          '00 Black SVTC - sold 5/1/10
                          '97 GL Turbo Zetec - gone

                          Comment


                          • #14
                            You up the fuel pressure, even though it is lean only around 4k, ups the fuel pressure across the rpm range, when you are running richer at higher RPM. I'd say you are running too rich in the upper rpm range.

                            My suggestion is take off the fuel pressure regulator. You don't need it for an intake and exhaust.

                            You won't need it for a turbo setup either (if you do it right with a full out custom tune). So sell it.;)
                            2008 Mazdaspeed3 Sport "The Angry Goose"
                            1979 Mazda Rx7
                            2000 SUPERCHARGED Ford Contour Zetec- sold 10/20/05

                            Comment


                            • #15
                              Did you reset the PCM? If not, I wonder if there is something funky with that FPR.

                              Where was the oxygen sensor when you were on the dyno? Tailpipe? If so, that can read lean when you're fine.


                              Originally posted by striker2 View Post
                              what gives?
                              --'96 GL * MTX Zetec-- SOLD! 3-12-2011
                              --- '06 Mazda 6s * 3L Duratec * 6-speed ATX * Lapis Blue ---
                              FOR SALE >> T3 Super 60 Turbo - Coated Focus Manifold - 42# FRPP Injectors - Focus CFM Throttle Body << FOR SALE (PM me)

                              Comment

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