I checked the ACT sensor, just a quick test, it disconnect the connector thats on the ACT sensor, plug a multi meter on and i checked the resistance but no resistance,
It's like the sensor is broken, but then i checked it on my brothers car and also no resistance, and my brothers car is also a 2wd saff but he hasn't got the problem.


The problem only shows up when it's hot outside and when the boost comes in.

What else beside the ACT sensor could it be?? MAP sensor??, maybe the iginition amplifier??