BB1995S6

Is that for the overboost? Sometimes my car runs very very well and sometimes it feels blah? How do you make sure the overboost works every time?

BB1995S6

Is it a button or stop?

UrS4boy

It's just a stop.

BB1995S6

After a closer look that's what I had thought. But I still am not sure how overboost is called apon? It seems to only happen 40 percent of the time. But when it works it's noticeable.

UrS4boy

Overboost is provided by the ECU and it depends on the RPM and throttle position switch position, i.e. wide open throttle. Overboost is only provided when appropriate and even then only for a maximum of 15 seconds.

BB1995S6

Thanks that helps a lot. There needs to be a full load switch.

UrS4boy

I'll let the boys at Bosch circa 1991, via my way-back time machine, of your concerns.

moorewr

That's the spirit.

BB1995S6

So when the car gets a custom chip can the tuner change the overboost? Or modify it? Or do you need to go stand alone em?