My S4 over the weekend would only boost to around 8 then dropping quickly to 4 or 5. For the duration i never really pushed the car hard.
On sunday it had a mad half hour on the M1 on my way home and was boosting and pulling like it used to! But now its back down to around 4 or 5 on boost guage and the car isnt pulling well at all.
I have checked my TBB and F hose and both appear ok. Ran vag com and my EGT on bank 2 has failed. (only just replaced bank 1 3months ago!)
MAF is only 2months old.
Cant hear any obvious leaks, even had my girls head out of the windows whilst driving, not safe but very funny for me!
Worried now that maybe one of my turbos has stopped working? Still hear a spool up noise when driving the car.
Is there any other hoses etc anyone can please point out for me to check?
I've briefly looked at the spider hose where i can see it in situ and appears ok.
I recently replaced my ECU but the car did the boost drop a couple of times with old ecu in and was working fine with new ecu in for a few weeks.