2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Injectors not working

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Old Jul 21, 2007 | 10:00 AM
  #1  
jboze84's Avatar
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Injectors not working

I'm still having problems with my injectors. I have low impedence s4 injectors, that are brand new btw, that I am using on my S5 high impedence harness. I spliced some resistors into the harness.

I tried testing the voltage at the ecu pinout and got 2-3 volts only on all 4. I know it's supposed to be 12v. Anyone know what may be causing this? As you can imagine the injectors are not shooting any fuel. I have fuel up to that point however.

Any help would be appreciated. I think this is the only thing keeping me from getting this beast resurrected.
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Old Jul 21, 2007 | 10:32 AM
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Remove the resistors and see what happens. Voltage wise that is. You are not going to ruin any thing if you do this and just idle/run at low load.
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Old Jul 21, 2007 | 10:53 AM
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ok. Should it at least start even with the low impedence injectors? Any idea if there is any other reason for such a low voltage readout?
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Old Jul 28, 2007 | 04:22 PM
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I tried that again and I'm getting 12v at the actual pins on the back of the ecu. When I test the harness and the injectors I only get like .3 volts not 3 like I thought before. What should I do next?
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