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This weekend I threw together a quick injector cleaning rig using an AJ16 fuel rail and pressure regulator. Getting fittings to match was sorted by a local hose and fitting store, 12mm metric to #4 JIC, Mto F and M to M.
Got my old pre tabk clean pump in a big container full of brake cleaner, dedicated 12V power supply and a pulse generator, all screwed down to some wood that was kicking about my workshop.
Please ignore the background mess!
Works a charm! Next step Ill add in a pressure gauge to make sure Im getting the correct spray pattern.
On that note, would anyone have any images of what an ideal spray pattern would be?
I had my injectors refurbished by a contact from another forum some years ago. Here's a couple of pictures he sent to me after the refurb showing good spay pattern and identical flow volume - which is also important to measure.
What pulse generator are you using? I did a fair few of these with just a 3d printed injector adapter for a can of carb cleaner but at the time I couldn't find anything suitable that would drive more than a single injector and even that was pushing the pulse generator, I think I've burnt it on a stuck injector. Pattern is just uniform, nothing fancy, you'll see a bad one when it will be leaking or dripping instead of spraying and that's the one you want to clean or tbh best to replace.
One issue with these injectors is that as soon as they sit for a few months, they often get stuck and no amount of pulsing with a bench pulse generator provides enough power to get them unstuck, I think mine was just based on NE555 but it couldn't provide much power.
Thanks B1MCP, that's perfect, exactly what I was looking for! I'll be sure to check volume as well. The jet is looking very similar, so that's good to know.
Katar83, Im using a simple pulse generator from Amazon. I'm running one jet at a time right now, just swapping the connector (one I took off the parts car). I'll add a photo of the generator when I get back to my workshop next week.
These jets were from a 96 X300 that has sat for about 5 years without running. The last time it was turned over the fuel tank was full of water, so that got pumped into the rail and jets. Amazingly 4 of them worked, badly at first, then ran evenly. 2 are definitely dead. This was my test before I remove the ones from my running kitty.
Injector cleaner Rig
