Hi all,
I have rev hanging when changing gears in my VY manual V6 eg. when i push the clutch in and let off the throttle it stays around 3000rpm (sometimes slightly increasing) and doesn't drop until i change. After lots of reading it appears this is normal and possibly done for emissions.
I was wondering if anyone has found the maps/scalers for the iac that can remedy this situation assuming it is the factory tune causing this?
Regards,
Matt
Rev hang between gears
Re: Rev hang between gears
Is it factory setup with factory tune? Shouldn't do it, is IAC valve free and working? Throttle blade not sticking? No fault codes? Could be tps sensor sticking high also
Re: Rev hang between gears
Yeah factory everything still. The fist thing I did was remove cleaned and spit on all the usual culprits then i started to do some research and apparently it is a normal condition? i am not a fan
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vlad01
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Re: Rev hang between gears
This is like DBW in newer cars, not good for the syncros in the gearbox. Dumbest idea ever.
If you rev your VY in N while standing still, does it do the same? if not then its probably programed to do it or perhaps maybe TPS issue? I noticed my VP did a similar think when the TPS shaft end cap fell off when replacing the TPS and it went a bit revvy after but did get a TPS fault code. But in my case it also did that in N while not moving.
If you rev your VY in N while standing still, does it do the same? if not then its probably programed to do it or perhaps maybe TPS issue? I noticed my VP did a similar think when the TPS shaft end cap fell off when replacing the TPS and it went a bit revvy after but did get a TPS fault code. But in my case it also did that in N while not moving.
I'm the director of VSH (Vlad's Spec Holden), because HSV were doing it ass about.
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antus
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Re: Rev hang between gears
I assume no fault codes are logged?
Have you read the FAQ? For lots of information and links to significant threads see here: http://pcmhacking.net/forums/viewtopic.php?f=7&t=1396
Re: Rev hang between gears
No codes are logged. I still am thinking its a tune thing as there are lots of posts about it.
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VX L67 Getrag
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Re: Rev hang between gears
I think I've heard of the same thing if the wrong calibration was used, but you said everything was stock, as in still the original PCM in the vehicle & untouched?
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VL400
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Re: Rev hang between gears
Its called throttle follower or throttle cracker. The PCM adds IAC steps to smooth out throttle transitions and reduce emissions. Takes the place of the old mechanical dash pot. Not sure if these tables/scalars are defined in many XDFs though.
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OZ38
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Re: Rev hang between gears
Yes my stock VY V6 manual ute has always done it from new. Don't notice it much with a stock exhaust, but I am told you do more so with a noisier exhaust note.
Re: Rev hang between gears
Ok cheers guys i will just live with it.