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R33 Gtr - No Injector Pulse

Candy

By Candy,
in Engines & Forced Induction

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Piotr87 Rookie

Piotr87

Posted
Posted

I check my self and i use little flash lights on injector plug there is no power no flashing i swap cas and lights start flashing i start up the car morden 10 times with no problem after 1h same story no light on flash lights and i do not have qlue what is going on 

I didynt see foult code thats was on the dyno i was oway i ben told that from the garage whou do my car 

GTSBoy Grand Master

GTSBoy

Posted
Posted

So, now you need to use the wiring diagrams and the multimeter to look for where the power is coming to, where the earth is (usually through the ECU's injector pin) and make sure there's power where there is supposed to be and no other wiring problems.  If there is no pulse, then the ECU is the likely culprit.

GTSBoy Grand Master

GTSBoy

Posted
Posted
13 minutes ago, Piotr87 said:

When i check last time on ecu plug was 6 wire positiv and ground go to 2 slots in ecu that like should ?

Ooh.  Yuck! Group fire.  That means that the ECU is firing 3 injectors at the same time, then the other 3, then the original 3, etc etc.  A bit shitty.  Does the ECU not have enough drivers for sequential injection?

At least that means that there only needs to be 2 injector drivers failed in the ECU to explain the fault.

Of course, it could be a configurational fault, in that maybe the injectors are switched off or something.  But you said that the car ran at some point then wouldn't run.  So it sounds like not a configuration problem.

You need to disconnect the at least one set (3) of the injectors at the ECU and simply put your noid light direct onto the ECU terminal.  Of course with 12v connected to the other side of the noid light.  If you get no pulse at the ECU itself, then it's not even trying to fire the injectors.

GTSBoy Grand Master

GTSBoy

Posted
Posted

You can't really learn anything by pulling out the loom except that it won't work at all while it is out.  Sometimes pulling the plugs apart and putting them back together makes a bad connection good again.  Of course, sometimes it makes a good connection bad.

The reality is that you either don't have power or you don't have the ECU providing ground at the injector.  It's either bad wires or a bad ECU.

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