New answers tagged leak
Alloys tend to lose air after a while due to corrosion on the rim/tyre junction. In the past I have taken them to an engineering company who will skim the rims back to perfection. Problem solved but did cost £35 per wheel.
Book your car into a repair shop for a smoke test on your intake and exhaust systems. This will reveal any vacuum leaks. Also, do not under estimate the value of a scan on your engines systems.
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