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    Fuel pressure and vacuum specs for 3800 Series II

    What are the Fuel Pressure and Vacuum specs for a 3800 Series II (97 Buick Riv) for SC and NA engines? How stable should the fuel pressure be? steady on the gauge, or jittery gauge needle? Thanks, -Ed
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    Engine stumbles, unstable idle after WARM start-up

    1997 Riviera - 3.8 Liter, L36 - 139,795 miles I'm posting this question in TB because the problem hasn't been solved in other Buick forums. When starting a WARM engine (3800 Series II) the idle is unstable, rough and stumbles for 3 to 5 seconds, then smooths out. It runs GREAT otherwise and...
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