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new mercedes injectors, runs bad rich

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  • new mercedes injectors, runs bad rich

    I just installed a set a new set of mercedes Injectors, now my car will not even go past 3,500 rpm. I can see lots black smoke out of the exhust, Can It be that rich with out a fuel managent system?

  • #2
    omgwtfbbq

    you're doubling your injector size and asking if you need any other changes?

    you seriously have to start reading things like the turbo faq, this is far too n00bish

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    • #3
      What exactly, if anything, are you doing to adjust for the larger injectors?

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      • #4
        I have lots of upgrades, CIMA turbo, Kakimoto Full 3'' exhust, Isky turbo cams, z32tt fuel pump, I was going to add Nitrous, dry fog. I bought the kit. But thought I need bigger injectors. Now my car is not drivable, runs poor, black smoke, cuts out about 3,500. Not sure what to do?. add a apexi safc 2, or call Jim Wolf for a ECU. I was running 14.6 a few weeks a go. I have added a posi. Any ideas?

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        • #5
          I did nothing, I thought it would run a little rich, but damm, It took me like 8 hours to install the injectors, And it runs like crap, so much for cruising tonight.

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          • #6
            /me looks for a match. We're gonna have flames tonight!
            http://z31performance.com/forum/viewtopic.php?f=5&t=147

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            • #7
              edsz31 wrote: I did nothing, I thought it would run a little rich, but damm, It took me like 8 hours to install the injectors, And it runs like crap, so much for cruising tonight.
              420/260 = 1.62 or a ~62% increase in fuel flow at the same pulsewidth.

              That means a 14.7:1 air to fuel ratio would become about a 9.0 AFR with just swapping the injectors, which is so rich the engine can barely fire.

              You will need to reduce the fuel pressure to a point where the car will run better (but too low below ~30PSI and the fuel won't atomize properly) and defeat the purpose of running larger injectors until you can correct for the injector increase using one of the many available methods...

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              • #8
                Im not sure what to do, if I pay $500.00 for a J-W ecu, I may want to upgrade The turbo later may need to get ecu upgraded again. If I get a Apexi safc I will need to program it I have a 4 gas at work, But no dyno. Whats the best way to lower fuel pressure, Fuel pressure regulator?

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                • #9
                  again read the turbo faq.... your options are listed

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                  • #10
                    I will try to find, new here, LOL

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                    • #11
                      I cant find the turbo faq Help

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                      • #12
                        edsz31 wrote: I cant find the turbo faq Help
                        First thread on the top of this page


                        This thread is done
                        2005 whore magnet

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