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Check the fuel pressure on the fuel rail. There is a Schrader valve located on the fuel rail on top of the intake manifold. If you have adequate fuel pressure, check for ignition problems. If no or low fuel pressure, you may have a faulty fuel pressure regulator(also located on top of the intake manifold).

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โˆ™ 2005-12-20 14:42:23
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Q: 90 grand prix replaced fuel pump and filter hear the hum now but car still wont start what could be wrong?
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