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I am trying to narrow a no start situation. New fuel pump,inline filter and i have fuel at the shrader valve seems to have proper presssure. Can i spray some starting fluid into the throttlebody it is a central(sfi) type system. I diddnt chek my ignition yet due to lack of equipment with me at the time. Going to verify good spark tomorrow. I was told the car will run but seems to be starving for fuel (lack of power) no stumbling or irratic symptoms. Going by my trusty ol Haynes manual it states that "the injectors are a non serviceable item". ok fine but will it be worth my while to check the filter behind the press. regulator? Any other pert. information regarding this particular engine would be a great help to me. By the way I replaced my injectors in a 1995 Chevy Astro van with a 4.3 liter cmfi type system. Thank you for your input in advance.