Join Date: Sep 2008
Location: Fruitland Park,Florida
Please state your car's year so I can investigate this. And you are talking about the coolant temp sensor on the water pump, correct? If so, to avoid confusion call it the ECT.
Have you tried plugging ect back in while engine running to see if engine keeps running.
If engine will run with ect plugged back in, I would hook up to a scanner that does real time sensor scans and see if ect temp reading, which is for car's computer, matches that of temp gauge.
An out of range ect can cause hard starts. but check all the sensors as ect might not be the problem. When you unplug the ect, the car' computer defaults to open loop and runs without using many of the sensors. So by unplugging the ect and forcing computer into open loop, the offending sensor, not necessarily the ect, is taken out of the system and car starts. That's my story and I'm sticking with it. For now.
Last edited by cocobolo95; 11-19-2012 at 10:43 AM.