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Old 01-14-2009, 09:59 AM   #2
Earl43P
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Join Date: Aug 2007
Location: E-City, NC
Posts: 3,161
Vehicle Year: 2000
Vehicle Make: Ford
Vehicle Model: Ranger
I use this vehicle for: a driveway ornament, light hauling
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"The ECT is third in command in the hierarchy of EFI sensors, this means this sensor is very important when calculating fuel ratios and timing curves."

from http://www.fordfuelinjection.com/?p=28


I believe you'll need to drain your coolant down below the level of the T-stat you plan to replace. I don't know about your ECT - it may not even be bad, but is simply reporting to the computer that the coolant isn't ever getting up to temp (from the bad t-stat). I've heard something about the new t-stats having a temp sensor built in and costing $140. Don't know if that's what you've got or not.


Welcome to TRS (an expert will be along shortly to help you with the other questions).

Last edited by Earl43P; 01-14-2009 at 10:05 AM.
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