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1988 Volvo 240 DL N/A with about 300k miles. It uses Bosch LH 2.2 fuel injection with all black injectors, part number 028150734.
It's a fixer-upper, the prior owners not doing routine maintenance other than oil changes.
I want to do a DIY fuel injector flush, i.e. not send them out.
I already read the FAQs herein.
I'm not so sure that the back flush technique would work with my elctronically activated fuel injectors.
I'm wondering about getting a junkyard wire harness, connecting the wire to the battery, then introducing fuel injection cleaner through the top of the injector. I checked my Bentley manual's wiring diagram, but it's unclear which wire is power and which is ground.
Do Bosch/OEM fuel injectors have a lifespan such that preventive maintenance is called for?
How often should I be cleaning the fuel injectors off of the car?
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