Hello all.
i wonder if anyone has any suggestions as to why my car keeps cutting out after it gets hot. It idles very tough and drops around 500RPM and cuts out. It's fine from cold start or if I let it cool down. I recently changed my Synapse recir valve to a HKS dump valve (with no new tune), I'm not sure if that's the issue.

I thought it might have been the cam position sensor, so I changed that and added a heat shield but problem still exist.
I am thinking of changing the coolant temperature sensor next.

Any advice would be greatly appreciated.

 

Starting by putting the recirc valve back on.