Originally Posted by
Loomer
How do you expect it to cold start well without a functioning air bypass then? Surely you've answered your own question as to why it's bad
Engines are very inefficient when cold with the enrichened afr etc, and are easy to "stall" which is why even from the days of a manual choke a cold starting car was given an increased idle speed to aid stability and prevent it cutting out until it was warm enough to be leaned off and operate normally.
You've turned half the cold start mapping off by cutting the increased idle speed. Why do you think the valve is there?
Best thing you can do is put a STD valve back in, and mod it so it will still function well enough to give you a nice increased idle speed,
Or use 2 valves one STD for cold start, and a second for ALS
thanks for the reply
i really don't think the ISCV is the issue, i have run this system for the last 10 years without experencing the issues i now have, yes i agree it's a pain that i have to monitor the rpm with the throttle which i've got used to over the years this isn't a big issue for me
even if the rpm is increased it still cuts out, my best guess of the issue is a management plug that is making a weak connection and the virbration from the polly engine & gearbox mounts is causing the cutout, i could be way off on this but it's the only thing i can think of now