Hello, I'm new here I have a problem with T4 2.5 car I bought a long time ago someone replaced the timing car burns well on a warm on a cold worse I tried to set the pump to vag but the values do not change after adjustment I will add that the pump is not set on the sign only the sign is almost the tooth below as set on the sign the car will not fire. Could be a pump or regulator, please help and thank you in advance