Removing Idle Stabilization Valve?

[LeafBox]

I'm referring to a MC2-engine, but I guess the same goes for all the 5-bangers with ISV...

We all know it's usually just a troublemaker, so is it as easy as just plugging the hoses and raise the idle with the screw on the throttle body?

[UrS4boy]

N71 Idle Speed Stabilization Valve (ISV or ISS Valve) Info

I'm referring to a MC2-engine, but I guess the same goes for all the 5-bangers with ISV... We all know it's usually just a troublemaker, so is it as easy as just plugging the hoses and raise the idle with the screw on the throttle body?

Not the same. If there is a computer and there are things like A/C you need and want a properly functioning N71 ISV. Removing it will create several issues, including engine stalling. But hey...it's your car.

N71 Idle Speed Stabilization Valve (ISV or ISS Valve) Info:

http://forums.quattroworld.com/s4s6/msgs/21853.phtml

[quattro-nick]

you can always try
i woud remove the isv and place a adjustable screw( like the ones they use on a gas system) between the 2 hoses from the isv
you can adjust idle by hot engine
but like dave says, probably you going to have problems with cold engine or at other times

[newsh]

Mine is still running the original ISV after 250,000 miles, just clean it with WD40 now and then, it's fine.

[andy10v]

You can, but you will have a high/low hot/cold idle.

SJM has some good MC2 ISV testing and idle setup

http://www.sjmautotechnik.com/trouble_shooting/injector.html#mixture

[LeafBox]

Fine, I guess it stays then

[jameswkr]

Or, just try running with it unplugged. I tried this due to a stalling issue. It made the throttle response very jerky and undriveable.

[morgenlatte]

i had the ISV unplugged at my MC2.. it has a "rescue" gap, so the engine runs OK when cold.. i also only had troubles with the mc2 ISV..