VIM (Variable Intake Manifold) Amplifier Deletion

[Tazzi]

Hopefully this little blurb will help out others that go to get an update on their ECM for all early VE V6 commodores.

This action MUST be completed prior to updating the ECM, details on which VINs are affected are indicated in the attached PDF.

Essentially the VIM amplifier is removed by a simply loop back so that the VIM Value is directly connected to the ECM. This is performed due to various issues that were occurring (Engine DTC P2008) as well as the massive improvements on the software side.

Recently I was asked about the VIM amplifier delete, Its not often I come across something that I have absolutely never heard of (Almost embarrassingly so!), and even worse there is literally no documentation online in regards to this!

The attached PDF is the tech bulletin which indicates the required procedure to be conducted prior to update the ECM. The required plug for the deletion from Holden is ~$100, but you can get away with wiring it yourself (Simple loop back).

Hope this helps out!

[Holden202T]

that's interesting that it only specifies VE's I would have thought a VZ would be the same as early VE.....

if you makes you feel any better I haven't heard of this either hehe!

[Tazzi]

that's interesting that it only specifies VE's I would have thought a VZ would be the same as early VE.....

if you makes you feel any better I haven't heard of this either hehe!

Good question... Ill call Holden technical later and see what they have to say. Its not even easy to find that tech doc even with access! Its hidden within tonnes of tech bulletins.

[Holden202T]

is the only symptoms the DTC or does the car start doing funky stuff ?

[Gareth]

VZ dont have VIM, i have done hundreds of the VE 1 'VIM amp reworks' haven't done one in a few years though...

[Holden202T]

I can't understand why they don't and the VE does ? then obviously it wasn't working properly or needed so later ones don't have it anyways ?!?!

[pman92]

I have heard about this but never actually had to do the job.

I thought VZ "high performance" V6 had VIM but standard didn't?
Do all VE alloytec have it?

Later ones still have a VIM, your not actually removing the variable intake manifold.

Your removing the amplifier for the position sensor signal, is that correct?, or is the amplifier driving the VIM actuator, amplifying the actuation signal coming out of the PCM?

Whatever it is your either A: removing the amplifier from the circuit and connecting the position signal directly to another input pin on the PCM, or B: removing the amplifier and connecting the VIM actuator to another output from the PCM. And then changing the software on the PCM to suit.

Not sure why they changed, maybe the amplifier was problematic, maybe they decided it wasn't required and could save money not installing them and the only reason for the modification is so there isn't the requirement of 2 different sets of software for vehicles with/without when the software would otherwise be identical

[Holden202T]

yes the 190kw or 195kw in VE I think have the variable inlet manifold where the 175kw motor doesn't, the 190 also got the 4 adjustable cams as apposed to 175 with just inlets adjustable.

[hsv08]

VZ dont have VIM, i have done hundreds of the VE 1 'VIM amp reworks' haven't done one in a few years though...

Did you use the "VIM DELETE" plug? or just resolder the wires to loop back? im after more info regarding the what happens to the plug end once disconnected.

[hsv08]

yes the 190kw or 195kw in VE I think have the variable inlet manifold where the 175kw motor doesn't, the 190 also got the 4 adjustable cams as apposed to 175 with just inlets adjustable.

It was a very early SV6 that I came across with this VIM delete issue, as far as im aware it was only the very early batch of S1 VE SV6 with the VIM AMP fitted, the later removed and rewired them on the production line