Anyone have a cure for my speedcut at 180kph. This is a Japanese spec ECU (stock Subaru). This happens at 170something kph road speed as I found out at the drags, starts with what feels like rev limit then just cuts all fuel. I might be able to replace my existing Subaru VSS with an aftermarket sensor that has half as many pickups, this might fool the ECU? What do you think?

[Edited on 7-6-2004 by speedster356]

I was told my auto ecu * stock subaru * should not have the problem .

I think back some where here there was some imput to this problem .

I can not see my self needing to go more than 130ks on my trike !

Mine is also from an auto. The auto module has been unplugged and removed, just leaving the engine ECU.

[Edited on 7-6-2004 by speedster356]

places like MRT sell speed cut limiters for not much cash but you are exactly right just half teh output pulse to fool the cpu. I think there may have been an article in autospeed about this but I'm not 100% perhaps a search of the site. What happens if you unplug the speed sensor? just out of interest

I tell you as soon as I finsh it .

I believe it upsets idle and low speed running. It may also effect AFR at higer RPM?, I'm not sure. Speed cut defenders are in the 300 paso mark. Jaycar have a kit coming out in september for $44, so that seems to be the go. Check the jaycar site, they have quite a few automotive kits going.
http://www.jaycar.com.au

just use less magnets.

The ECU runs different mapping if it thinks the car is moving, or so I am led to believe. Apparently the subaru's also shutdown the engine if it detects it is at full load and not moving for too long.

I have my Mazda speed sensor running at a different ratio to the wheels than the standard mazda set-up, so when I am doing 260kph the ECU thinks I am only doing 180kph. So my speed limiter is changed to 260kph. Of course I won't get near either of those.