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You will need to remove the upper intake manifold, lay it back, then the fuel rail is directly underneath. It is held on by two bolts. Remove these, then put on your new injectors and o-rings, and make sure to put a even coat of vaseline on the o-rings to help them slide easily into the lower intake manifold. Tighten the bolts, put the upper intake manifold on, and you're ready to go. This would also be a good time to replace the plenum gaskets (upper intake manifold) if necessary. This job should take the average do-it-yourselfer about 2 hours to complete.

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Q: How do you change the fuel injectors in 99 Malibu?
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