I filled my 2001 wrx ppp bugeye with a tank of tesco 97 octane. It will not run smoothly now. I am half way through my second tank of shell v power now and things have improved a bit but its still not right. How long should it take to get back to full performance. Should and how do I do a software reset on my bugeye.

 

My car was the same ran like Crap on the stuff . Not sure why Took a good 3 tanks full to get the power back

 

was it tesco super unleaded?

 

I think you should have used Tesco 99 instead.

If you reset the ecu then this may speed things up a bit

Either that or it's a coincidence that something else has gone wrong.

 

i havent had any problems with super unleaded from tescos as is 99 octane