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Injector wiring / IACV Issues ** Please help me out.

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Old Jul 5, 2005 | 02:53 PM
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Si Integra's Avatar
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From: Cincinnati, OH, USA
Default Injector wiring / IACV Issues ** Please help me out.

I am not really sure where to start. I would first like to start off by saying, Hondata was more than useless in helping with this issue. I really feel sorry for those of you that need/have tried to get help from them. Rather than help, they spend all the time on the phone explaining how you are obviously wrong, rather than trying to listen to the problem at hand.

First off, here is a picture of my wiring. I know it is sloppy, but I have swapped it around 3-4 times. i will redo it after it is correct and my issues are resolved.




I have wired the injectors according to 2 different schematics. First: Hondatas tech schematic. Second: TurboGixxers schematic. I first found the continuity between the 4 injectors and the butt connector. I then snipped the wires. I wired the 12v side (4 wires) into the red wire on the resistor pack, then wired the remaining 4 individually into the remaining 4 yellow/brown injector wires.

Here is where my dillema starts. I have had a few people look at the wiring and they have all said it was correct. So now, I turn it over to you all. Assuming the wiring is correct, I am not sure where the issue comes to play. My IACV pops on and stays on when ignition is applied. (12v or engine running)
You can hear the plunger pop and humm constantly. If I remve the butted connector from the injector clip as shown below, the buzzing stops.




So I was puzzled. I called AEM and was told the circuit boards are completely different between the injectors and the IACV in the AEM EMS unit. They also insisted the wiring was the issue. This led me to test another EMS, which yielded the same results. Puzzled, I then tried an OEM ECU... Same issue. At this point, I had to beleive it was the wiring. So, I began to tinker. Only one of the 4 wires from th eactual butted connector contains 12v supply. There is continuity between the butt connector and the IACV at the lower right pin on the above picture. How can this be, considering AEM said these are different circuits all together? Unless, I have wired incorrectly, which brings me right back in a full circle. I am sincerely frustrated and keep receivng the same answers over and over. I have searched and read posts for over a week now. I have tried to edit the ems to adjust the HZ of the IACV, with no change in resolve.

Here is the real kicker, The car ran just fine with no problems before I cut the wiring harness to wire in the resistor box. The ems was in th ecar and no issues with either the IACV or the injectors existed. I have also tried to switch out IACV thinking this could be the issue...Yep, you guessed it, no resolve.

I am truly open to advice, suggestions, and constructive criticism; however, please do not patronise me, I am frustrated and really do not have the patience for it.

Thanks in advance for all your help!
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