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surging/flucuations while crusing in vaccuum
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05-20-2012, 04:36 PM | #1 |
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surging/flucuations while crusing in vaccuum
Hi all,
I noticed that when I'm cruising, not in boost, the car feels jerky/surging/hesitating. You can actually feel the jerking/hesitation, sort of like it wants to pull. This only happens when I keep the throttle constant, not giving gas, to maintain a constant speed limit. It doesn't happen while the car is idling or when in boost. When I give gas, it'll go away but does come back sooner or later. Anyone have any ideas what it could be? Video below Thanks!
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05-20-2012, 04:51 PM | #2 |
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Video is private.
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05-20-2012, 05:05 PM | #3 | |
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05-20-2012, 05:09 PM | #4 |
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What bypass/bov are you running?
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05-20-2012, 05:11 PM | #5 | |
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05-20-2012, 05:14 PM | #6 |
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I've run into this problem when the spring setting in the bypass valve is too soft and starts to crack open/close/open when cruising at a high enough RPM to make positive boost pressure when cruising. I solved it by running a stiffer spring (yellow). Do you know what springs you are running?
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05-20-2012, 05:26 PM | #8 |
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[QUOTE=I've run into this problem when the spring setting in the bypass valve is too soft and starts to crack open/close/open when cruising at a high enough RPM to make positive boost pressure when cruising. I solved it by running a stiffer spring (yellow). Do you know what springs you are running?[/QUOTE]
Yup, I'm running the yellow springs. I'm pretty positive. I just checked the box, there is a set of blue and a set of green springs in there.
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05-20-2012, 05:26 PM | #9 | |
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05-20-2012, 07:49 PM | #11 |
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I have the same set up and the same issue. But I believe I am running the green spring, I'm gonna try a different one.
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05-20-2012, 07:55 PM | #12 | |
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05-20-2012, 10:24 PM | #14 | |
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05-20-2012, 10:36 PM | #15 |
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i am noticing this too but what i have is if cruising at around 60mph at 2000 rpms with slight gas pedal pressure for awhile i see boost guage surge up like 1 psi or so quickly then back but not all the time.i have a tial bov with std spring no color just metal.maybe it could be that?Maybe get a harder one?
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05-21-2012, 08:07 AM | #17 | |
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05-21-2012, 08:20 AM | #18 |
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Which color springs do you have in the valves?
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05-21-2012, 09:27 AM | #19 | |
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05-21-2012, 10:11 AM | #20 |
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what are the issues with this i never gotten a straight answer other then something about adaptations
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