034 efi problem any ideas....

[TalonESIT]

Just finished installing the hahn manifold w/ the 450cc dsm injectors. I also wired in a honda resistor box, the the 450cc rail harness. I went for a drive tuning and about 10 minutes of messing with the software. and my laptop. the car suddenly bogged down and now the efi unit is not working. I tested the voltage going to the resistor box and i have no voltage, but im not sure if the efi even sends voltage to that harness when its not hitting boost.

There is also a relay that I checked but im not sure which part of the relay to check for voltage. Why did the unit go out on me when anyways? I hooked up the resistor box correctly and everything so I can't see how the 034 efi unit could have fried on me... any ideas?

 

[TalonESIT]

I installed a new relay and in testing the voltage, with the car running, I have about a 12V+ reading coming straight from the battery but when test the ecu voltage connection on the relay im getting nothing, a fluctuation from .02 to .03 volts, does that sound normal? Could it be my grounds? because I know I checked my grounds and they seemed fine.... I just dont understand how the 034efi could just blow out like that...

 

[Kirby]

You do have a constant 12v to that resistor box at all times right? You do have the EFI setup to provide GROUND to the injectors when they fire correct? Right now it sounds like your EFI is not getting juice so you need to find out what that is about first. Check the relay, try to hard wite it to the batt just to test it. Once you have juice there we can figure the rest out.

 

[TalonESIT]

You do have a constant 12v to that resistor box at all times right? You do have the EFI setup to provide GROUND to the injectors when they fire correct? Right now it sounds like your EFI is not getting juice so you need to find out what that is about first. Check the relay, try to hard wite it to the batt just to test it. Once you have juice there we can figure the rest out.

I tapped the resistor box into the 12v that was going to the injectors so yes it is a constant 12. As far as setting up to provide ground when the injectors are fired, Corbin did all the wiring for that before me and I have not changed a thing, as far as the wiring to the efi goes, and it worked fine before so I know that the efi is providing ground when the injectors fire.

I did send a direct power connection to the efi and I am getting power and it communicates with the laptop fine. I think the problem lies within my ground that connects to the relay... so I am in the process of taking a closer look at that right now.

Thanks for the tip Kirby. I'll update in a little

 

[TalonESIT]

I completely forgot that the wire that goes to the relay from the battery has a fuse on it as well... and that was the problem... blown fuse. I still dont understand why the fuse blew?
Anyone have any ideas why it would blow?