I have a friend with a ls1/rx7 and we are trying to figure some things out.. Car runs fine when it is cold but after warming up it starts running like crap. At first I thought bad o2s, so we replaced them with new delco ones, but the problem is still there. I heard if the coolant temp sensor is not working or inaccurate it could cause similar conditions.. The car hesitates badly and wont hold an idle when warm yet It runs completely fine when cold... Thanks in advance