A repost

[Tony Bryant]

> 
> A simple fuel injector cleaning circuit. The injector is operated at
> a very high rate, the hope is that it helps "bang" off of the varnish/crud
> off of the pintle. One can back-flush the injector while it is running,
> thus helping the cleaning process. 
> 

<Snip 555 circuit>

A slightly more sophisticated curcuit would allow you to alter the 
duty cycle (via a pot), to allow holding the pintle just off its 
seat (say vibrate between 0 and 10% open), as opposed to the above 
circuit that will probably just hold the injector between 90%-100% 
open.

I suspect the injector will start to scream when you get the duty 
cycle just right.


'71 510 Daily driver
'72 510 Race car
'85 V12 XJ-S Garage ornament