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Q:

Where is the fuel pressure regulator on a 1995 Buick Riviera?

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it's plugged into the fuel rail on the back side. If this is a SC coupe, find the PCV valve housing. Look just to the right of it and down beside the housing. You'll see the top of the regulator and it looks like a vacuuum diaphragm. There will be a vacuum line that runs from it to the vacuum block. You can change it yourself but it's a very tight fit and requires a pair if snap-ring pliers to remove the snap-ring holding it onto the fuel rail. One the ring is removed, just pull the regulator straight out. Remember to replace all Orings and seals with new ones. more
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