Diesel Injection Services LLC in Grand Rapids.....we've had injectors rebuilt and balanced/tested by them. They are a Bosch Specialty shop.....and do excellent work. I'd check them out for your pump tuning.
http://maps.google.com/maps?hl=en&client=firefox-a&channel=s&rls=org.mozilla:en-US fficial&hs=7Y8&um=1&ie=UTF-8&q=Bosch+Diesel+Injection+Grand+Rapids&fb=1&split=1&gl=us&view=text&latlng=10557067695419530437
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