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Issues with SC injector

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  • Issues with SC injector

    Hi all,
    After a small fender bender I have gathered all my parts and my 1996 Miata with the TVS 9000 is running. It is one of the old configurations as the air intake wraps under the air intake manifold and it is right by the cross member.

    I was going back and forth with Tom trying to diagnose this issue but maybe with more heads on the case I will solve this sooner.

    Before the car accident I hadn't installed a wideband and therefore cannot speak to the running condition of the car back then.
    Currently the wideband is reading lean, about 14-15 AFR at open throttle over 3000 RPMs

    So far from the testing I can confirm the following:
    When disconnecting the wires to the injector, the cars AFR does not change at all - confirming the injector isn't properly working with the power cards
    When the car is idling and I ground the injector the car floods and dies - confirming the injector does operate given the correct signals
    When I hook up a voltmeter to the wires coming off the ECool card and I use a hand pump to simulate boost, the voltage never goes to 12V even when the multimeter is in peak mode
    At one point pumping pressure to the Ecool card would cause a change in the number of lights illuminate, that doesn't seem to be the case any more (I really hope I didn't break the pressure sensor of the card)

    All things considered what should be my next move?
    How can I test to see if the pressure sensor is messed up in the ECool card? what could be happening within the card that resulted in no voltage change when the card saw pressure.
    Could a bad ground cause this?

    Any and all help would be appreciated!

  • #2
    Tried everything on the e-cool card but it unfortunately looks like I busted up my boost sensor. TOM I NEED YOU!

    Comment


    • #3
      Sorry, I did not get notice of this post. Are these the older cards with the small nipple on each card or the newer cards with the single 3 Bar sensor wired to each card?
      sigpic


      1990 with FFS Coldside. At least 260 WHP NON-INTERCOOLED

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      • #4
        It is the old type with small nipples at the top.
        let me know if I need to have the cards swapped or something of that sort

        I'm motivated to get the Miata back on the road, I feel bad seeing it sitting and collecting dust

        Comment


        • #5
          Those cards are fine. Just make sure the small black tube is on the nipples and not loose
          sigpic


          1990 with FFS Coldside. At least 260 WHP NON-INTERCOOLED

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          • #6
            I've tried multiple tubes, I can share more pictures.

            What could cause the LEDs to not turn on with building pressure? I've been using a hand pump and only one of the cards, the timing one, responds to pressure with more of the lights turning on.

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            • #7
              Is the engine running?
              sigpic


              1990 with FFS Coldside. At least 260 WHP NON-INTERCOOLED

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              • #8
                Yes the engine runs, the wideband O2 sensor reads lean, 14-15 at full throttle above 3000 RPMs

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                • #9
                  I meant was the engine running when you were testing with the pressure pump.

                  When driving and you put your foot down, is there any lights on any of the cards? Do you get a blue light at position 8 on any of the cards? Does your boost gauge read pressure with foot down?
                  sigpic


                  1990 with FFS Coldside. At least 260 WHP NON-INTERCOOLED

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                  • #10
                    Yes, the car was running while I applied pressure with the hand pump and only the timing cards' lights lit up with pressure.

                    I don't recall what light were on specifically last time I tested the car under load. I'll do a test ride later today.

                    Yes, the boost gauge would show a positive reading under load. Very jumpy as I recall.

                    Again, I'll conduct further testing later today to get the latest observations.

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                    • #11
                      When you ran the test with the pump, did you just take a short piece of the tubing direct to the ECool card? If not, that would be my next test. Then move the tube to the Boost Fuel card and repeat.
                      sigpic


                      1990 with FFS Coldside. At least 260 WHP NON-INTERCOOLED

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                      • #12
                        I have done both those tests, short direct lines to the individual cards. Boost Fuel responds with more lights but ECool does not.

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                        • #13
                          Did you send me those cards for updates?
                          sigpic


                          1990 with FFS Coldside. At least 260 WHP NON-INTERCOOLED

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                          • #14
                            That's correct, you sent them back with a pulley I bought as well.

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                            • #15
                              With the slightest amount of pressure with my hand pump, the boost fuel card starting blinking the 8 light blue. The E-cool card only blinks light 1. Click image for larger version

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