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Torque454 02-11-2013 08:33 PM

Cleaning Ford 302 fuel injectors
I think i have one fuel injector not working. I purchased a pigtail for the injectors, and a 9v battery (found something on google that said to use a 9v battery to activate the injector) and i used my mouth to blow air through (so far) 4 of the 8 injectors. I found one that air would not pass through. I suspect it is clogged since it clicks but wont flow.

How do I clean these injectors? Do they have to go to a shop or can I clean them myself? Any way to test the spray pattern? The air flow trick only tells me that the injector flows, not how well it sprays.

spinn 02-11-2013 11:22 PM

Did the coil winding fail open in the soleniod.

Check the resistance in ohms.

If it needs new injectors get new. I dont buy into the cleaning and rebuilding. They spray fuel . Fuel cleans them.

Silverback 02-12-2013 01:50 PM

Apply power, does it click? do all the coils have the same resistance (older ones should be in the 11-15ohm range)? If they aren't then the coil is open and it needs to be replaced. If it doesn't click the pintle or disk is stuck, without a flowbench and ultrasonic cleaner you're unlikely to get it unstuck.

what works the best is to put them in an ultrasonic cleaner with a mixture of injector cleaner and mineral spirits while pulsing the injectors, then put them on a flow bench and flush the cleaning mixture forwards and backwards while pulsing the injectors.

Oh, you might want to replace the screens in the inlets too. Replacing o-rings and pintle caps is usually a good idea also, they're cheap.

Barring that you might have some luck just soaking them in a similar solution or if the car runs you might get somewhere by putting a good injector cleaner (the chevron stuff is pretty decent) in the gas at 2x the recommended concentration.

crownver 02-12-2013 02:51 PM

If you don't want to have them professionally cleaned, might be worth a shot. You can see what your spray pattern looks like too.

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