Ideally you want to suspend them in an ultrasonic bath and exercise them by feeding pulses through the solenoids while they are cleaning. I would also rig up some means of observing the spray pattern and flow rate so you know if you've improved them. An old fuel pumnp and FPR, rail and a circuit to actuate the injectors. Ideally you want to find a fluid as a petrol substitute with a similar density but not quite as likely to turn your garage / shed, etc. into a fireball.
Perfectly do-able on a DIY basis but not sure it's worth setting up for a one-off job.
I've used these people before:
http://www.injectorcleaning.co.uk/. Very good service. Injectors come back clean with a before and after report on flow rate and spray pattern. Rubber seals, finger filters and pintle caps replaced with new.
I went to the trouble of getting a second set of injectors to cover me while they were away. Needn't have bothered. The morning after I fitted them to the car the cleaned ones came back. They were away well under a week and I sent them bog standard first class post.
Kevin
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Topic: d.i.y. petrol-injector cleaning (Read 923 times)