My zafira is making this exact noise when driving
http://youtu.be/GmHB5xJlc_8
It happens after the clutch comes up on load.
No error codes.
Never does it in the first 10 mins of driving on a cold engine.
Local garage can’t figure it out.
Last 9 months of jobs done on the car
New gearbox / slave.
egr channels cleaned
new spark plugs (GM ones)
oil / filter / air filter
New delphi coil pack
oil pump gasket
front cam shaft seals
cam cover
New thermostat / wahler one with new sensor in it.
front 02 sensor changed was causing idle issue, new one cured it. Was sluggish
EVAP valve - Miss diagnosis from garage who thought my idle issue was this and failed to test old one.
Cambelt kit
STFT is between -0.8 / -1.6 (switching)
LTFT is 8.6
Last edited by ZaffyB; 17-06-22 at 07:49.