Idle Problems When Cold
 

Hi All

I have a 1992 T4R 3.0 V6 Auto that starts when cold but instead of idle going to 1500 to warm up as it has in the past in now goes down to 300-500 and sometimes stalls out.
It also has some shaking at 1100-1300 rpm cold or hot.
I replaced the cold start injector and fuel filter with no change, also had a recent oil change and atf drain and fill.
Any ideas?

efi temp sensor? poor connection?