| Author | Topic |
|---|
Location:
Vic
Registered:
May 2002
|
|
4age tvis
|
Sun, 07 March 2004 10:32
|
 |
My TVIS doesnt seem to be working & from what ive found in searches the solenoid should have power at low revs to allow vacuum to keep the flaps shut.
I tested voltage at the connector & there isnt any.
I had a look at the manual & it says voltage hould be present above 5000rpm, this is opposite to how i understand it to work.
Can someone tell me if they have voltage at idle etc?
|
|
|
Location:
Sydney
Registered:
January 2004
|
|
Re: 4age tvis
|
Sun, 07 March 2004 10:41
|
|
|
sorry bmak don't know. Have you checked fault codes. 4400 rpm is where the "flaps" open I've read a few places. I thought the flaps were shut normally and then above 4400rpm the solenoid opens the flaps?? Maybe the manual is saying 5000rpm just to give some leway. I would think the manual would be correct. Anyone with more first hand experience with the TVIS butterflies
|
|
|
Location:
NSW, East Coast
Registered:
July 2003
|
|
Re: 4age tvis
|
Sun, 07 March 2004 10:42
|
|
The tvis stays closed/partly closed till a certain rpm (around 4500rpm) to improve low rpm torque, then it opens,
The vacumm is there to open them, not keep them closed.
Start the car, let it warm, the give it some curry, you will here the engine note change when the tvis opens, or just look under the hood and rev the motor from the throttle body, look under the manifold and you will see the rod move, if the rod isnt visable stick your hand up there.
If the tvis wasnt working properly the car would find it hard to rev higher in the rev range.
Hope it helps?
|
|
|
Location:
Vic
Registered:
May 2002
|
|
Re: 4age tvis
|
Sun, 07 March 2004 10:46
|
|
Are you sure vacuum opens them?
I tested a FWD manifold i have in the shed & when i sucked on the valve they closed
|
|
|
Location:
NSW, East Coast
Registered:
July 2003
|
|
Re: 4age tvis
|
Sun, 07 March 2004 11:02
|
|
| bmak wrote on Sun, 07 March 2004 21:46 |
Are you sure vacuum opens them?
I tested a FWD manifold i have in the shed & when i sucked on the valve they closed
|
When the motor is running it will do the same thing.
When you hit a certain rpm the solenoid will activate the vacumm tank(big round cylinder, i cant think of the name of it) that pushes the butterflies open?
This is how i understand the tvis to work, i was stairing and thinking hard when i put my motor together as to how it works and this is what i have come to.
If im wrong someone please tell me?
|
|
|
Location:
Brisbane
Registered:
February 2003
|
|
|
Location:
Vic
Registered:
May 2002
|
|
Re: 4age tvis
|
Sun, 07 March 2004 11:13
|
|
i just rechecked the manifold off an AE82
They are definantly open with no vacuum & close when vacuum is applied.
Is my RWD manifold opposite?
|
|
|
Location:
Sydney
Registered:
January 2004
|
|
Re: 4age tvis
|
Sun, 07 March 2004 11:32
|
|
|
lost the spring??
|
|
|
Location:
Vic
Registered:
May 2002
|
|
Re: 4age tvis
|
Sun, 07 March 2004 11:41
|
|
but they close when vacuum is applied
I'll have a closer a look at that manifold & the RWD 1 on my car tomorrow
|
|
|
Location:
NSW, East Coast
Registered:
July 2003
|
|
Re: 4age tvis
|
Sun, 07 March 2004 22:24
|
|
When not installed in the car my butterflies where closed, i remember holding them open to get a good spray of carby cleaner to clean the bastards.
Cut myself twice?
If the vacumm closes the butterflies, then what opens them.
|
|
|
Location:
Vic
Registered:
May 2002
|
|
Re: 4age tvis
|
Mon, 08 March 2004 04:20
|
|
I checked both the AE82 manifold & the RWD on my car today and they both have them open with no vacuum.
This makes sense as with full throttle held long enough there wouldnt be enough vacuum to hold them open anyway.
|
|
|
Club Member
Location:
sydney
Registered:
May 2002
|
|
|
Club Member
Location:
sydney
Registered:
May 2002
|
|
Re: 4age tvis
|
Mon, 08 March 2004 09:51
|
|
no vacume = closed solenoid and TVIS switched off under 4200-4500rpm, vacume builds in the resivior tank under the manifold, after switching rpm power is applied to the solenoid and opens the vacume from the resivoir to the actuator and opens the butterflys above 4500rpm.
vacume comes from the plenium so theres plenty there at high rpm.
maybe your vacume lines are around the wrong way?
|
|
|
Location:
Vic
Registered:
May 2002
|
|
Re: 4age tvis
|
Mon, 08 March 2004 10:02
|
|
|
so what keeps them closed when there is no vacuum?
|
|
|
Club Member
Location:
sydney
Registered:
May 2002
|
|
Re: 4age tvis
|
Mon, 08 March 2004 10:11
|
|
|
they are spring loaded
|
|
|
Club Member
Location:
sydney
Registered:
May 2002
|
|
|
Location:
Vic
Registered:
May 2002
|
|
|
