[Diy_efi] Grounding issues with Honda ECU

[Perry Harrington]

Peter,

Sounds like you have a voltage potential or open ground across your grounds.

Likely problems are corrosion in the engine block ground.
No engine block to chassis ground (voltage potential possible)
Loose ECU ground
Loose ground wires
Corrosion at point of connection
Intermittant/Flaky wire

These all sound like mechanical issues.  If you are reading a voltage potential
between the engine and ECU grounds, then they aren't connected well, electrically.

I'd replace battery grounding cables and thoroughly check the engine block to
wiring harness ground.

--Perry

>          The question is what to do about this.  I could wire the GND wire 
> to the car body under the ECU, but I wonder if there could be some reason 
> not to do this.  The EFI schematic shows two ground points, but does not 
> say where they are located physically on the car.  Has anyone out there 
> maybe got some advice?
> 
> Peter Vieth <fitek at ix.netcom.com>
> http://www.keast.com/slugman

-- 
Perry Harrington			Data Acquisition & Instrumentation, Inc	
perry at dainst dot com					 http://www.dainst.com/

Those who would give up essential liberty to purchase a little temporary safety
deserve neither liberty or safety. Nor, are they likely to end up with either.
                             -- Benjamin Franklin

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