My 2011 astra j 1.7 cdti is juddering when accelerating from 1500rpm to 2000rpm in 5th and 6th (worse in 6th) no juddering above 2000rpm or when just cruising, only happens when you try and give it some gas. Changed MAF sensor, fuel filter, air filter and suction control valve. Cleaned EGR valve and MAP sensor, also had front wheels balanced, still no joy. Anyone had it before or got any ideas?

I have a 2013 Astra 1.4i and the EML light is constantly on, the garage has reset the light but it immediately comes back on and also gives the code P0171.
[color=#383a3b][font=Inter, Helvetica, Roboto, Oxygen, Ubuntu, Cantarell, 'Fira Sans', 'Droid Sans', sans-serif]also when the car starts the fan switches on straight away. I have found some info about a PCV sensor or

Hi Guys,
I have fuel gauge which is fluctuating and some time it tells you the tank is low in fuel and sometime it is showing fuel gauge it is on ¼ tank, so I get warning sign low in fuel sometimes.

Sometimes if the tank is less than half full or even ¼ full and if you have parked half on the footpath and half on the road, after a bit it may show the tank looks empty, as soon as you drive it might go back to ¼ tanks display.

If I have my half tank and over the gauge there is no issue, as soon

Hi, apologies if I'm breaking any rules by asking here. I've searched and searched and found very little info from Google or elsewhere. It may be that I'm not using the correct terms, this is why I'm hoping that someone might be able to assist me here.

Tldr (too long didn't read):
I have an electrical static noise coming from the dash passenger side. It sounds like when a speaker is loosely connected and it crackles.

Details:
The noise began after installing a vibe active sub. The sub already