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Old 12-21-2012, 12:40 AM   #23
mikebontoft
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Join Date: Aug 2008
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Location: SLC, UT
What I Drive: 5.9L Grand Cherokee ZJ

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Well, when are you applying the brakes? at idle? how bad is the engine actually cutting out between that RPM range?

Try this on a car that works right..... step on the gas and pump the brakes. You'll notice it get hard. This is you losing your vacuum reserve and the inability to create more vacuum because the throttle plate is open.
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SR #127 | '02 Focus SE "Foci" (5.0 RWD - parting) | '90 Mazda 626 GT "Greenie" (2.2L turbo T3/T4 rebuild-sold) | '75 BMW 2002 "Carby" (resto-mod racecar) | '75 BMW 2002 (donor -sold) | '98 Jeep Grand Cherokee 5.9L (lifted and fast) | '99 BMW 328is (alt. daily).
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