VE jerking on take off

[1_johnboy]

I have a 2011 3lrt sidi v6 that jurks 2-3 from a start (never any more or less). Does it pretty much 80% of the time but can vary how much you can feel it. I mean from the initial start, not pulling off from a stop.
My thoughts were initially PS pump or rack issue as I was always turning the wheel when doing it. But tested a few time taking off straight and still does it.

Jerks arnt violent, just a noticeable drop in power. I have heard a few times a noise that may correspond with the jerking, something running for a short period of time apon start up maybe less than 5 seconds (maybe thermo fan?)

Just after some thoughts or if its a known issue

 

[namboss]

I have a 2011 3lrt sidi v6 that jurks 2-3 from a start (never any more or less). Does it pretty much 80% of the time but can vary how much you can feel it. I mean from the initial start, not pulling off from a stop.
My thoughts were initially PS pump or rack issue as I was always turning the wheel when doing it. But tested a few time taking off straight and still does it.

Jerks arnt violent, just a noticeable drop in power. I have heard a few times a noise that may correspond with the jerking, something running for a short period of time apon start up maybe less than 5 seconds (maybe thermo fan?)

Just after some thoughts or if its a known issue

is it misfiring?

 

[1_johnboy]

nah no misfire. noticed this morning that it only seems to do it when moving forward. Maybe ABS booster kicking in doing something

 

[namboss]

so you mean your car only jerks at cold starts? is it an auto or manual?
if you warm up your car before driving, does it still jerk?

 

[1_johnboy]

auto, does it cold or warm

 

[MKN]

yeah i've got a violent shudder every now and then as well, dual fuel though and happens mostly on gas, service should do it though

 

[parkerhawkinz]

Johnboy....
It's definitely ABS initialising. I have a MY10 Sv6 wagon and a 2011 SII SS sedan. The wagon thumps or jerks on front end 3 times at each cold start and then one click at about 25m or so. However the SS doesn't thump 3 times but the clicks x2 at 25m mark and are much louder, bit like a stone in the mud guard. Your issue is totally normal. When I say 25m, that varies due to speed.

 

[Shorty33]

I also have the 3.0 L SIDI, with 6-speed auto.
Last year, there were problems with the tranny. A full service (not an el-cheapo) made an enormous difference.
Your difficulties now sound similar to mine then.
So, my question is - how long since your tranny was serviced ?

 

[PIR4TE]

Johnboy....
It's definitely ABS initialising. I have a MY10 Sv6 wagon and a 2011 SII SS sedan. The wagon thumps or jerks on front end 3 times at each cold start and then one click at about 25m or so. However the SS doesn't thump 3 times but the clicks x2 at 25m mark and are much louder, bit like a stone in the mud guard. Your issue is totally normal. When I say 25m, that varies due to speed.

^^ this, definitely. Google ABS Self Test her using site search.

Also if your car has never had a trans service then do that and ask for a Fast TAP Relearn.

 

[1_johnboy]

Im told the scheduled service is at 160kms, I had mine serviced at 120kms (full flush, holden dealer - software was upto date Im told) made no difference. Im told its a characteristic of the ve2.