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Re: 96 burb fuel injectors
Well, two codes could be caused by bad injectors. The P0430 is usually a bad cat on the passenger side, but I wouldn't replace until the other codes are fixed. The most likely suspect for the P0172 and P0175 codes would be the fuel pressure regulator, followed by leaking injectors and pinched return fuel line. An unlikely cause for the P0172 and P0175 would be a problem with the base timing of the engine but it would most likely be accompanied by a misfire that may not set a trouble code
A fuel pressure test may determine a faulty pressure regulator. With the key on, engine off the pressure should be 60-66 psi and the pressure should not fall after the fuel pump shuts off
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