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Old 05-05-2015, 02:37 AM   #1
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Default ECU with no VTCS control - default position open or closed ?

Hey,

With a standalone ECU that does not control VTCS, do I need to do anything or is it open by default ?

Thanks
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Old 05-05-2015, 08:16 AM   #2
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pretty sure they are normally open, they close with vacuum when the solenoid is active.
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Old 05-08-2015, 01:17 PM   #3
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On "MS3 Basic" the output for VCTS is configured to switch "on" when under 2300rpm and 60C.
Can I understand from this that it is normally open (not restrictive) ?

Thanks
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Old 05-08-2015, 01:53 PM   #4
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thats exactly what he just said
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Old 05-08-2015, 02:37 PM   #5
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What they said. It's a cold start aid to reduce emissions and stabilize cold idle. Warm car doesn't use it at all I dont believe.
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Old 05-08-2015, 02:39 PM   #6
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correct. and you'll definitely feel it if you accidentally enabled it while driving because you'd lose 90% power
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Old 05-08-2015, 03:02 PM   #7
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And for the last time, your Haltech DOES control VTCS.
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Old 05-09-2015, 07:58 AM   #8
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I know Haltech can control VTCS, but if the default position is open I can spare one output.
The patch loom does not utilize it, it needs to be modified for VTCS control.
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Old 05-09-2015, 10:22 AM   #9
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Remove the VTCS butterflies from your intake manifold. Forget about controlling them. Have a beer.
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Old 05-09-2015, 11:57 AM   #10
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Quote:
Originally Posted by gjsmith66 View Post
Remove the VTCS butterflies from your intake manifold. Forget about controlling them. Have a beer.

better with less work:

replace VTCS IM with VICS or flattop.
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Old 05-09-2015, 04:15 PM   #11
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True, but less money for beer than....

Point being, stop wasting time trying to control them.
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