testing injectors

[Tom Sharpe]

Pick up the EFI driver board and hook it up. Just use any kind of switch to
turn it on/off.. Sharpe

James Weiler wrote:

> Gang, I was flipping through my copy of 'Maximum Boost' and noticed he
> had a simple injector tester.  He had the injector opened by a simple
> switch hooked up to a 9V battery and he said to measure flow for 1 minute.
> This would hold the injector open at 100% duty cycle.  I know this is a
> bad situation but for purposes of testing is this going to damage the
> injector (I don't need to measure for the whole minute, I could use 15-30
> seconds if that makes a difference).
>
> Will this work for peak and hold injectors?  If these injectors need 4
> amps to open then I'm going to need something like a car battery to open
> the injector.  Is using a car battery a bad idea here?  i.e 12V vs. 9V
>
> I have some professionally cleaned and flow tested injectors that I can
> use as a refrence and I'll use methanol or paint thinner as the solvent
> or hexane (I'm a biochemist so I can get anything) ya hexane sounds good
> as it's not too volatile, methanol would be cheaper and easier however.
> Need some thought here.
>
> I know someone posted a simple circuit to based on a 555 timer but I'd
> like to do this quick.  However if this is the only non destructive
> method then I will build that guizmo.
>
> Any and all ideas welcome as usual.
>  jw