Auto Shudder

[CAMZVS]

Hi just bought a VS commodore very happy with it besides the fact when sitting at the lights it will shudder and feel real notchy until you lift your foot of the brake and go agian and its fine. The auto dosent slip at all, and change gears smoothly, If any one will know what causes this help would be greatly appreciated Cheers Cam

[peckzz]

sounds like your brake booster, or you need to reset your ecu so it might set the idle, what revs is this doin when your at lights?

[CAMZVS]

revs at bout 500 with my foot on the brake

[Brett_jjj]

The brake booster is probably stuffed and letting air get in past its seals or valves,which will make the engine run rough because the brake booster uses vacuum from the engine to work.Hows the brake pedal feel to push in,hard or normal?

[CAMZVS]

Nah Brakes are fine dosent lose pressure at all feels like normal commodore brakes

[peckzz]

revs at bout 500 with my foot on the brake

try reseting the ecu

best way for this is to disconnect the main 60 amp fuse which is 2x10mm botls holding it in, and of course disconecting the battery as well

but others say just leave the battery off for 5 mins does the same, but up to you, just give that a try, and if thats not it, its your brake booster

[CAMZVS]

thanks for the help guys ended up been one engine mount and the transmission mount cause every thing to rattle and shake cheers cam