Thread: Low Vacuum in 390
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	11-04-2009 12:54 AM #1 Low Vacuum in 390 Low Vacuum in 390
 
 Hi,
 
 I got my 390 running well finally. There is just one slight problem, its not changing gear well at all. I took the car to my local tranny specialist and found that the tranny (FMX) and the modulator works fine. He tells me I must sort out my low vacuum issue first before we fine tune the tranny.
 
 Its running a fairly large cam, about .406 lift if that makes any sense. When the motor was at idle I sprayed the manifold and carby base plate with carby cleaning to check if there was any fluctuation but there was none, So no leaks by the look of it..
 
 The reading at idle is 150 on my weird aussie gauge?.. which is in the red but I think you guys work in inches?
 
 have any of you guys had the same drama?
 
 What can I do..
 





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I'm happy to see it back up, sure hope it lasts.
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