3.6 Varioram dying when I depress clutch at stops

[Polson89]

I have a 1970 RSR Clone with 3.6 Varioram.
On an increasing basis (about 50% of time now), when I come to a stop and depress the clutch, usually in 2nd, the car is dying. If it doesn't die, the it will almost die and return to idle. (like it's starved of fuel?)

Normal Idle is fine. (when I start the car it idles fine at 900-1000)
Not experiencing any power loss under little or heavy acceleration.

Fuel filter? Thoughts?

[gregwils]

You should probably post your question on the 993 forum. The regular 911 forum focuses on pre-964 cars.

Porsche 964 & 993 Technical Forum - Pelican Parts Forums

[Polson89]

Thanks. appreciate it.

[Bill Verburg]

Originally Posted by Polson89

I have a 1970 RSR Clone with 3.6 Varioram.
On an increasing basis (about 50% of time now), when I come to a stop and depress the clutch, usually in 2nd, the car is dying. If it doesn't die, the it will almost die and return to idle. (like it's starved of fuel?)

Normal Idle is fine. (when I start the car it idles fine at 900-1000)
Not experiencing any power loss under little or heavy acceleration.

Fuel filter? Thoughts?

Assuming that it's a US 96-98 vram , they did experience aan issue as described when a l/w clutch fly wheel replaced the very heavy dual mass stock set up, usually w/ AC on

If it's a '97 or '98 the DME can be reflashed to update it and cure this issue, If it's a '96 you are SOL

If it's a RoW then you can rechip it w/ a Steve Wong chip, whicjh is what I did

another possibility though more rare is a gummed up idle control valve, The flap should move freely when it's removed and shaken a bit, use carb cleaner to clean it up

[Jeff Alton]

If none of the above work, the ISV can also be modified to help with the issue. Our experience is that with the AC on the problem lessened...

Cheers

[Bill Verburg]

Our experience is that with the AC on the problem lessened...

??

You can try to reclock the ISV, use a Dremel to free up the 3 retaining screws then rotate the internals wrt the case. Mine had a too high idle when it was first tp'd, the result of an air leak, I tried to reclock but it didn't do any good, The reason is that the DME controls the idle speed and resets it, It does help if the internal electric contacts are worn