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jerky

Tech Talk for Cruiser owners.

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jerky

Post by Alvin »

I guys does anyone know this problem?
Got a 78ser with 1hz it gets a bit jerky once in a while but does it all the time if the car been idiling there for 15 or more min.
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Post by beanz2 »

I'll guess an air leak somewhere in the fuel lines.

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Post by dumbdunce »

some more info on the vehicle and its history could be helpful. how many km? service history? is it a clutch shudder or is it in the engine?
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Post by Alvin »

The cars done 81678kms still a baby but it's a engine thing i've changed the clutch to a exedy sports heavy duty so that shouldn't be the problem.
i've tried lookin for an air leak in the fuel lines but don't see any. But there is always a but! i service it every 5000kms drop the oil and filter fuel filter every 10000kms.
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Post by dumbdunce »

Alvin wrote:The cars done 81678kms still a baby but it's a engine thing i've changed the clutch to a exedy sports heavy duty so that shouldn't be the problem.
i've tried lookin for an air leak in the fuel lines but don't see any. But there is always a but! i service it every 5000kms drop the oil and filter fuel filter every 10000kms.
is the shudder evident only when driving, ie actually moving the vehicle, or is it there if you just rev the motor up? when you start out or when cruising along and putting your foot down? obviously these things hcan be tricky to work out even if the vehicle is right in front of you so I'm just trying to cover all the options...

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Post by Alvin »

it only happens when starting off like when in 2nd around 2500rpm-3000rpm and it starts jerkin, if i put foot down more it gets worst until a point when its alright.it won't happen if just idle and reving it. only when under load
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Post by spazbot »

taking off in 2nd gear as in you skip first ???
i think that might give you a bit of a shudder
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Post by dumbdunce »

Alvin wrote:it only happens when starting off like when in 2nd around 2500rpm-3000rpm and it starts jerkin, if i put foot down more it gets worst until a point when its alright.it won't happen if just idle and reving it. only when under load
this doesn't really makse sense - 'starting off' is best done in 1st gear at 750rpm. when you're in 2nd at 3000rpm it's just about time to shift up to 3rd.

still not clear by your description whether this could be a clutch shudder or an engine problem?
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