How about a link instead of making us search???
Done......I think. I have not linked before and was unsure how. I think I got it right.
There are two water temp sensors in the lower intake manifold. The 2-wire sensor is for the ECM. The 1-wire sensor is for running the temp gauge.
I saw in the manual that it showed several temperature sensors on the Intake Manifold, so this takes care of one of my future questions.
You lost me here. An IAC is a computer controlled idle valve. The 2.6 doesn't have an IAC valve. And what do you mean by it has "strong vacuum"?
Sorry. I have seen it called the IAC as well as the Auxiliary Air Valve. I did not know there was a difference. <img src="/forums/images/graemlins/confused.gif" alt="" /> Yes, I mean the Auxiliary Air Valve. The big hose that attaches on the side of the throttle body has strong vacuum at cold start and then the vacuum decreases as the engine/valve heat up.
So, an idle problem when cold likely won't be an ECM/sensor issue. (I suppose it still could be a fuel/MAF issue though).
I am at wits end so the sensor just seemed like a remote possibility. The Mass Airflow Sensor (and the Fuel Pressure Regulator) was replaced with a rebuilt unit just prior to the problem developing. If the MAF sensor was faulty, why would it run perfect once warmed up?
It's controlled mechanically by the AAV and the TV.
I thought the Thermal Valve only opened to allow additional cool air in when the system starts to get hot, such as when the AC is on? I did not know it has anything to do with cold start. Could this create the symptoms described in my previous post?
Since the problem started immediately after having the MAF sensor and the Fuel Pressure Regulator replaced, I am planning to go to the U-Pull-It yard and see if I can find a MAF sensor in good shape to switch out. I also plan to get one of the Thermal Valves and one of the Temperature Sending Units. I am going to switch out one at a time and see if, by some miracle, I stumble onto the problem.
