corerftech
Active Member
- Joined
- Apr 22, 2021
- Messages
- 208
- Reaction score
- 84
- Points
- 28
- Location
- Memphis, TN
- Vehicle Year
- 1987
- Make / Model
- Ford Ranger
- Transmission
- Automatic
1990 dual plug, runs exquisite.
‘cept- coolant temp sensor NOT changed when the truck was worked over for defects. The only sensor not altered/tested/replaced.
Temp gauge used to move 1/8 inch off left stop, slowly to zero motion now. No code for missing sensor so it’s still in loop but it is certainly not working.
Coincident: idle went from 850 to 1000 regardless of warm up cycle, etc. 200 mile drive, goes right for 1000 rpm.
I have assumed the ECT sensor is giving ice cold condition and computer is raising idle to accommodate like it’s stuck in a warm up cycle.
Fuel economy is still 24mpg or better. Else the truck and engine are simply superb.
Is there a flaw in that line of thinking? Both defects occurred simultaneously.
I have a new sender and will attempt install this weekend. Just wanted some confidence —— or rebuke—- on line of diagnosis and thinking.
‘cept- coolant temp sensor NOT changed when the truck was worked over for defects. The only sensor not altered/tested/replaced.
Temp gauge used to move 1/8 inch off left stop, slowly to zero motion now. No code for missing sensor so it’s still in loop but it is certainly not working.
Coincident: idle went from 850 to 1000 regardless of warm up cycle, etc. 200 mile drive, goes right for 1000 rpm.
I have assumed the ECT sensor is giving ice cold condition and computer is raising idle to accommodate like it’s stuck in a warm up cycle.
Fuel economy is still 24mpg or better. Else the truck and engine are simply superb.
Is there a flaw in that line of thinking? Both defects occurred simultaneously.
I have a new sender and will attempt install this weekend. Just wanted some confidence —— or rebuke—- on line of diagnosis and thinking.