Power VIS woes

Redmaestro · 6th April 2016, 08:23

Need some help with my new vis motor: i bought a reconditioned power vis from a reputable seller from ebay. Took the old one out and new one went in fine. Went out for a spin but felt no difference, even at 5,000 rpm. I came back home, took new one out and put a dab of waterbased paint on the peg to make sure it was inside the arm when fitted, which it is. Any thoughts what i can do next? My car has never had a working power vis so i dont know what it feels like when working (slight difference or blinding obvious). The balance is fine, as tested by Jules in Colwyn Bay on a T4 a few months ago

coolcat · 6th April 2016, 08:31

Dave (Stocktake) is your man to help on here.
Give him a PM and I'm sure he can guide you

stocktake · 6th April 2016, 08:47

If you are going to POL we could test it there for you?

mh007 · 6th April 2016, 08:47

Dave (Stocktake) is indeed the man you need, especially if you need VIS motors repaired as he also upgrades them at the same time.

You should feel a burst of power at around 3,000rpm when the Power VIS kicks in.

Having said that, have you checked the movement of the arm that controls all the butterflies (the arm that the Power VIS peg sits in) ?

If it feels all sloppy, it could be broken & not operating the butterflies (although rattling noises are usually heard when this happens).

I would also check to make sure that the arm is not excessively stiff as this could make the Power VIS override its teeth inside.

Redmaestro · 6th April 2016, 09:01

Probably not going to PoL this year due to work commitments but I'm trying to get a last minute swap, but the arm seems free enough; I can slide it in & out with ease, and had to pull it all the way out for the motor to fit into the arm. I cant hear a rattle either, so I'm stumped!!

gazcaz · 6th April 2016, 10:51

Need to check the wires to the viz.i happen to of just recently fitted Stocktakes upgraded viz and you can feel the train action around 3000rpm.

stocktake · 6th April 2016, 11:35

Quote:

Originally Posted by Redmaestro

Probably not going to PoL this year due to work commitments but I'm trying to get a last minute swap, but the arm seems free enough; I can slide it in & out with ease, and had to pull it all the way out for the motor to fit into the arm. I cant hear a rattle either, so I'm stumped!!

That's a good sign I presume you mean you had to pull the brown arm across to the drivers side so the peg locates. That tells you the peg and therefore the vis is in the correct rest position.

mh007 · 6th April 2016, 15:23

I wonder if that refurbished VIS is actually working ?

SD1too · 6th April 2016, 19:06

Quote:

Originally Posted by Redmaestro

Went out for a spin but felt no difference, even at 5,000 rpm.

Simon,

The power VIS actuator responds to rapid movement of the accelerator pedal. If you accelerated normally and smoothly, you won't feel a thing. However if you 'floor' the pedal the car should pick up its skirt and sprint for the finishing line!

Quote:

Originally Posted by mh007

You should feel a burst of power at around 3,000rpm when the Power VIS kicks in.

It's the balance flap which operates at that engine speed Mike.

Simon

6th April 2016, 08:23	#1
Redmaestro Avid contributor Join Date: Mar 2014 Posts: 106 Thanks: 11 Thanked 4 Times in 4 Posts	Power VIS woes Need some help with my new vis motor: i bought a reconditioned power vis from a reputable seller from ebay. Took the old one out and new one went in fine. Went out for a spin but felt no difference, even at 5,000 rpm. I came back home, took new one out and put a dab of waterbased paint on the peg to make sure it was inside the arm when fitted, which it is. Any thoughts what i can do next? My car has never had a working power vis so i dont know what it feels like when working (slight difference or blinding obvious). The balance is fine, as tested by Jules in Colwyn Bay on a T4 a few months ago

6th April 2016, 08:31	#2
coolcat This is my second home Audi Q3 TDI S-Line Quattro Join Date: Jul 2007 Location: Clacton On Sea/On the boat somewhere Posts: 51,164 Thanks: 9,890 Thanked 12,235 Times in 8,232 Posts	Dave (Stocktake) is your man to help on here. Give him a PM and I'm sure he can guide you __________________ Jeff.

6th April 2016, 08:47	#3
stocktake Vis Whiz Rover 75 2.5 auto Saloon Join Date: Jun 2007 Location: LEEDS Posts: 20,591 Thanks: 2,057 Thanked 3,056 Times in 1,621 Posts	If you are going to POL we could test it there for you? __________________ Dave... Lost a few stones and a Gall Bladder and part of a bile duct and all of my dignity in the suppository incident

6th April 2016, 08:47	#4
mh007 This is my second home MG ZT260 SE, MG ZT190+, MG ZTT 160, R75 Conn SE 2.0, R75 Conn SE 2.5 X 3, R75 Club SE 1.8, P5B Coupe Join Date: Jul 2009 Location: Keynsham, Bristol Posts: 4,211 Thanks: 65 Thanked 635 Times in 499 Posts	Dave (Stocktake) is indeed the man you need, especially if you need VIS motors repaired as he also upgrades them at the same time. You should feel a burst of power at around 3,000rpm when the Power VIS kicks in. Having said that, have you checked the movement of the arm that controls all the butterflies (the arm that the Power VIS peg sits in) ? If it feels all sloppy, it could be broken & not operating the butterflies (although rattling noises are usually heard when this happens). I would also check to make sure that the arm is not excessively stiff as this could make the Power VIS override its teeth inside. Last edited by mh007; 6th April 2016 at 08:51..

6th April 2016, 10:51	#6
gazcaz I really should get out more....... MG ZT Join Date: Nov 2014 Location: Worthing Posts: 2,744 Thanks: 3,944 Thanked 576 Times in 471 Posts	Need to check the wires to the viz.i happen to of just recently fitted Stocktakes upgraded viz and you can feel the train action around 3000rpm. __________________ [SIGPIC][/SIGPIC] MG ZT 2.5 V6 234th of 2,834 Trophy Blue ZT 190 + Saloons Produced 14th of 27 MG ZTs Produced on 27-09-2001

6th April 2016, 09:01	#5
Redmaestro Avid contributor Join Date: Mar 2014 Posts: 106 Thanks: 11 Thanked 4 Times in 4 Posts	Probably not going to PoL this year due to work commitments but I'm trying to get a last minute swap, but the arm seems free enough; I can slide it in & out with ease, and had to pull it all the way out for the motor to fit into the arm. I cant hear a rattle either, so I'm stumped!!

6th April 2016, 15:23	#8
mh007 This is my second home MG ZT260 SE, MG ZT190+, MG ZTT 160, R75 Conn SE 2.0, R75 Conn SE 2.5 X 3, R75 Club SE 1.8, P5B Coupe Join Date: Jul 2009 Location: Keynsham, Bristol Posts: 4,211 Thanks: 65 Thanked 635 Times in 499 Posts	I wonder if that refurbished VIS is actually working ?