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FPV GT surging and jerking 

 

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 Post subject: FPV GT surging and jerking
Posted: Sat Nov 22, 2014 11:42 am 
Tyre Shredder
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Location: adelaide
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Hi Guys and Girls,

its been a long time since ive been around, anyway, im a proud new owner of a 2009 FPV FG GT, but i have two issues that i hope you can shed some light on for me..

1 - during the drive the car is surging
2 - when i brake the car comes to a stop then does a little jerk and sometimes adds a second jerk onto the end just to be that extra annoying

ive done a google search but not coming up with much, anyone have ideas on whats going on here?

Thanks :)

 

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 Post subject: Re: FPV GT surging and jerking
Posted: Sat Nov 22, 2014 3:45 pm 
NSW Cruise Moderator
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check the harmonic balancer out. It could be shagged and slipped. Seen it happen to a mates, similar diagnosis.

 

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 Post subject: Re: FPV GT surging and jerking
Posted: Sun Nov 23, 2014 12:21 am 
Tyre Shredder
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thanks for the reply, i'll get it checked out :)

 

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 Post subject: Re: FPV GT surging and jerking
Posted: Sun Jan 04, 2015 3:52 pm 
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Xine,

I was just wondering if you'd had any progress with your surging issue? I've been doing some reading about transmission issues because of failing heat exchangers causing problems like that... I also have a mate whose car is doing similar things.

 

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 Post subject: Re: FPV GT surging and jerking
Posted: Mon Jan 05, 2015 6:03 pm 
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Id like to know if you have had any success with the jerking issue.

Xine, peanutau, are you symptoms like this: Your cruising alone at 100k and you watch the tacho "flare" up and down by about 150rpm every second?

Also a vibration thru the car?

Are yours both ZF 6 speed?
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 Post subject: Re: FPV GT surging and jerking
Posted: Mon Jan 05, 2015 7:10 pm 
Tyre Shredder
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Location: adelaide
SA, Australia

Hi there,

yeah the problem was the transmission had crapped itself. how bad i have no idea, not sure of what work they actually carried out but it now runs a treat :)

Christine

 

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 Post subject: Re: FPV GT surging and jerking
Posted: Mon Jan 05, 2015 7:49 pm 
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I dont spose you could find out what was done to it?
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 Post subject: Re: FPV GT surging and jerking
Posted: Tue Jan 06, 2015 4:43 pm 
Tyre Shredder
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the repairs were done under warranty and they did give me a brief run down on what the issue was with the transmission but sorry ive already forgotten.

the surging would happen at any speed, id catch the rev counter bouncing back and forth. i didnt experience any vibration as such, just the jerking when i came to a complete stop.

 

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 Post subject: Re: FPV GT surging and jerking
Posted: Wed Jan 07, 2015 3:55 pm 
Tyre Shredder
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Not sure if you are aware, or how much research you have done on the subject, but if I were you, I would make sure that they added an external transmission cooler this time around. It only costs a few hundred and will save you thousands upon thousands of dollars in transmission rebuild costs if it happens to you again out of warranty!

 

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 Post subject: Re: FPV GT surging and jerking
Posted: Wed Jan 07, 2015 6:21 pm 
Tyre Shredder
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thanks for the heads up, i might get in touch with them and find out what work was done exactly and see if it included what you are mentioning. Thanks :)

 

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