having similar symptoms so no need to start new thread.  car recently started pinking constantly when feathering throttle.  if I blip throttle at tickover, you can now hear the air filter drawing air, with a slight delay in revs picking up.  mpg dropped around 9 mpg.  temp on test menu is 87c when driving and been sat ticking over for 20 min, test reading of engine temp not went above 99c.

Anyone think it's worth trying a thermostat.

13 hours ago, Bar72 said:

having similar symptoms so no need to start new thread.  car recently started pinking constantly when feathering throttle.  if I blip throttle at tickover, you can now hear the air filter drawing air, with a slight delay in revs picking up.  mpg dropped around 9 mpg.  temp on test menu is 87c when driving and been sat ticking over for 20 min, test reading of engine temp not went above 99c.

Anyone think it's worth trying a thermostat.

I haven't read the rest of the thread, but the thermostat on this engine doesn't open until 90c.  It sounds like yours is working fine.

On 6/20/2024 at 11:06 AM, TomsFocus said:

I haven't read the rest of the thread, but the thermostat on this engine doesn't open until 90c.  It sounds like yours is working fine.

I was entering test mode today for the first time and saw Engine Temp avg around 118 with a spike at 127 and i was scared but after reading this thread i'm sooooo happy.Thank you.2009 Focus 1.6 Ti Duratec Ghia Titanium.