[joborosco]

i have done the following:

1. cleaned IAC
2. new plugs and wire
3. replaced 4 o2 sensors..chek engine lite was on
4. injector flush
5. cheked fuel pressure

and in the process of this my mechanic says that engine' runs cool' and wants to replace thermostat

thing is the problem i took it to him for was not resolved. it still idles rough before warmup and sometimes idles down to stall. it also sometimes has to be started twice.

is the 'cool' running engine the culprit?

i don't know...but he didn't fix it. and i am talking about a grand here.

is there something fundamental to this ford 4 l OHC engine that we don't know about?