Im got a problem with my Astra. All is well when driving normaly but if i boot it in say 4th gear. At around 3.5 - 4k it miss fires and i get the car and spanner symbol light up on the dash. Then it goes into limp mode so doesnt make any + boost.
Ive tryed to read the codes useing a Mac tools code reader but they wont come up for some reason.
I did put some crap fuel in it the other night.
So today i draind the tank empty, cleaned the little filter on the pump (Is was full of crap) replaced the inline filter.
Just been and filled up with Shell Vpower and it still does it so i dont think the problem is fuel unless the injectors are blocked??
Can anybody shed any light on what the problem is?
Thanks in advance