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tvpierce · #4 09-22-2006, 02:34 PM

Here's my shade tree injector cleaner/spray-pattern tester:

Materials:
Air compressor with regulator & blow gun (or some kind shut-off valve)
2 foot length of 3/8" clear vinyl tubing
1 Brass plumbing adaptor to go from the blow gun threaded outlet to a 3/8" barbed connector
2 small hose clamps
1 bottle of Techron fuel injector cleaner.
1 clear soda/beer bottle

Set your compressor regulator to the spec for the fuel system on your car. (I think about 70 lbs... is that right Gilly?)

With injector removed from car, attach the vinyl tubing to the threaded end of the injector. (3/8" is intentionally too small -- it has to be tight, you have to stretch it with a pair of needle nose pliers, then twist the tubing on the threads of the injector to pull it on.) Then put one of the small clamps over that connection. This connection will drip a few drops while pressurized, but nothing of any consequence.

Next put the brass barbed plumbing connector on the other end of the tubing, and clamp that connection.

Fill the tube with Techron.

Thread the brass plumbing connector into the blowgun.

Hold the injector in the mouth of the soda bottle.

Squeeze the trigger on the blow gun. The air pressurizes the fluid and pushes it out the injector into the soda bottle.

Refill tubing with Techron and repeat as necessary.

This will show you the spray pattern, while at the same time, running straight Techron through the injector to clean it.

Granted, this is not going to give you the results you'd get if you send them out for professional cleaning. But it's a pretty good system for shadetree work.

Jeff Pierce