i've never had a bad injector in a 6 cylinder for some reason. I had 18 tested by now. and even if it were bad, the little ball in the PC will make sure it atomizes the fuel anyway so pop pressure is more important than spray pattern I believe. and the spring in the injector can get weak but I'm not sure if that spring sits in the nozzle or the top part?
what about the famous bosio's, anyone?

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1964 datsun 1500
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this is where I quote some dude, so I look smart because of quoting that dude that said something smart once

bosio's A good point. what are the choices buy Bosch nozzles and hope that you get the German or French made nozzles instead of the India made ones or spend extra and get Bosio nozzles. Are there any other sources of nozzles for his year and engine?

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84 300D, 82 Volvo 244Gl Diesel