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91 Grand Prix GTP 3.4l dohc stalling out on idle


Billy Kean

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So i am having a problem with my gtp it wants to die out at low idle i just replaced the lower intake manifold bunch of vacuum hoses the oil gauge goes from 225 then jumps up to 550 when it starts to putter. When i am driving it runs fine only does this when i stopp at a light anyone know what this may be??

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