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Old 12-16-2009, 08:53 PM
lkmarsh's Avatar
lkmarsh lkmarsh is offline
350 Buick
Join Date: Nov 21, 2008
Location: Modesto CA
Posts: 1,209
Try new vacuum fittings in the intake, sometimes they crack, and use a sealer. I use silicone. Also check the carb base plate bolts. A new carb is not necessarily a good one. Are you using a vacuum ball for the heater vacuum lines? Those crack, too. Took me two weeks to find that one. The spikes happening so quick makes me think the leak is really close to the gauge.

Seemed like a good idea at the time...
69 1414x Wagoneer 350/TH400 DD & Ski Ride
68 Chevelle wagon 350/BWT50
68 Impala wagon 327/400
73 Cougar droptop 351C/FMX Garage Queen
04 Impala LS - Wife's DD
73 Wagoneer parts donor

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