dlpalumbo

Just to tie up a loose end, I backed the set screw on my ISV most of the way out and the valve gap closed at the top and reopened on the bottom, just like John's video in post #35. So the discrepancy between my ISV and John's was just due to set screw adjustment. I still dont understand the logic behind having a discontinuity in the range of duty cycle that goes from decreasing idle from set point, to closed, to increasing idle.

Dick964

Hello John,

I am reading the topic about the ISV valve with great intrest, great post !
I've read that you order an ISV at Aliexpres. Did you already install it on your 964 ??
Question : does it perform well ? I am very curious about your experience with this ISV.
It sure looks like the original one from Bosch !

Thansk in advance for your answer.

Kind regards,

Dick964

John McM

Hi Dick, I bought mine after a fellow New Zealand 964 owner bought and installed one. His works fine. I haven't installed mine yet as my existing one is still working. For the moment it's a back up.

Dick964

OK John,

Thanks for response.

BR,

Dick

wallra

I just got one from autozone even though it said ac in the package was the bosch one I think it cost me $204. https://www.autozonepro.com/results/...requestid=9471

kkswow12

how does one do the fuel adadptation in a 964, i was not aware that it needs doing... and when does this need to be done....i would say right now as it hasn't been done at all on my watch...yet...! thanks, oh, i am also going to try cleaning the ISV...before i buy a new one...

Laker

Scantool, Hammer, Dutch Hammer or Durametric cables