87 e30 jumpy take offs

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87 e30 jumpy take offs

Postby jp 84 » Tue Apr 02, 2013 4:21 am

i have a 87 325
i have a problem with the clutch every time i take off from a stop. 1st gear has a shaky start and sounds like the clutch is jumping bad. only way it will take off smooth is if i ride the clutch from about 1200-1500rpmits just a guess the rpm gauge dose not work. once moving its good.

i have a stock duel mass flywheel and clutch setup
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Re: 87 e30 jumpy take offs

Postby Yoshi » Tue Apr 02, 2013 12:01 pm

does it do that in any other gear? Might be a dying trans. Check your fluid levels?
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Re: 87 e30 jumpy take offs

Postby M20_fever » Tue Apr 02, 2013 2:32 pm

Are you sure it's the clutch and not the engine missing?
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Re: 87 e30 jumpy take offs

Postby jp 84 » Tue Apr 02, 2013 10:09 pm

[quote="M20_fever"]Are you sure it's the clutch and not the engine missing?[/q
engine is not missing. it sounds to me that the clutch chatters an once the clutch is fully engaged it is normal
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Re: 87 e30 jumpy take offs

Postby jp 84 » Tue Apr 02, 2013 10:11 pm

Yoshi wrote:does it do that in any other gear? Might be a dying trans. Check your fluid levels?

just changed the fluid in the trans and it looked good
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Re: 87 e30 jumpy take offs

Postby M20_fever » Tue Apr 02, 2013 11:37 pm

how old is the clutch? How far down does the pedal engage?
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Re: 87 e30 jumpy take offs

Postby jp 84 » Wed Apr 03, 2013 12:56 am

M20_fever wrote:how old is the clutch? How far down does the pedal engage?

dont know how old the clutch is but the pedal feels good it engages about the middle of its travel
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Re: 87 e30 jumpy take offs

Postby M20_fever » Wed Apr 03, 2013 4:39 am

Has it been like that since you got the car, or did this symptom develop after working fine in the past? Any chance the PO installed an unsprung clutch?
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Re: 87 e30 jumpy take offs

Postby Yoshi » Wed Apr 03, 2013 11:18 am

maybe it's dual mass and the dual mass is dying? Never heard of that though.
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Re: 87 e30 jumpy take offs

Postby Space Dynamics » Thu Jun 20, 2013 7:46 am

I had this going on pretty bad in my car 'till I replaced the transmission mounts.
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Re: 87 e30 jumpy take offs

Postby 7pilot » Fri Jun 21, 2013 8:03 am

Is the rear main seal leaking?
That will make the clutch jumpy at certain times, usually when the car is cold.
The oil/dirt/friction material tends to be sticky at lower temps but has less effect when the drive train is up to operating temp.
imo.

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