i have a idle problem its jumping between 800 rpm to 1300 rpm
the code came up 6 flashes (temp control sensor) changed the one on the block now it still dose the same thing but when i test for codes all i get is the check engine light staying on no flashes
now i found other sensor on the thermostat hosing is that the one that controls the computer and the i should have change.
thanks
sick_sol

 

are you saying that when you're idling, the RPM's jump up and slow back down? Check the idle air control.

 

if the idling is NOT erratic, i.e. in time andat the same pace, then its the fast idle thermo valve, a small coolant valve under the throttlebody. they are made of wax and break easily.

 

were is the thermo valve located and do u have a pic of one i think i already repalced that one i have replace the map sensor, the iac sensor many of time now there is one on the back of the thermostat hosing what is that for?
thanks