Coolant Temp Sensor adjustment
Quote from stevant on June 10, 2019, 7:57 pmI currently have speedhut gauges. I’m glad I read this as my fan is controlled by the Fitech. It turns on at 190F. I thought that was accurate but now I’m second guessing. My speedhut gauges are reading 100c (212F) when my fans turn on. I thought my gauge was calibrated incorrectly but looks like my Fitech is wrong!!!
Look at your data and compare. Sometimes it is the location of the sensor. Or in many cases a bad sensor. We have the update available, but I personally recommend replacing the CTS with a Delco sensor. I have the part number listed with a link in the Parts and Accessories topic.
Ok, can you also check the OHM reading across the sensor too?
Can I use the AC Delco sensor you suggest on my 351 Ford? Looks exactly the same as what I have so I assume it will work.
Thanks......
It is the same sensor, just a different brand that I know works. Have replaced many. I throw out the factory sensor.
Ordered a new sensor, will keep you posted!!
New replacement sensor went in today....... I’m a believer. My Fitech handheld temp now matches my Speedhut gauge exactly. (F/C) I used the AC Delco sensor as suggested. My fan now kicks on at 88 Celsius on my Speedhut gauge where before it was at about 102 Celsius. My Fitech controls the Fan so when it was reading 190 F (old sensor) must have really been over 210F
thanks again!!!!!!!!!
A friend of mine changed his Fitech sensor today with the AC Delco with the same success. His Fahrenheit on the Fitech now matches the Celsius on the Speedhut gauge. Question I have is when we’re we going to be notified by Fitech of this issue and if an update was needed when were we going to be told of it. I stumbled upon this forum fortunately just concerned for others who might not.
hello everyone,, new here,, so my issue im having ,, is when i start it cold starts good but after a minute or two it freacks out dashbord locks up rpms say 5999 and and it runs like crap and dies,, i hit the back button and back to dash bored gauges it runs good again then it freaks out like two or three times ,, then it runs good after it warms up a little more ,,is that a coolant temp sensor problem or is there something else going on ??
Quote from fordwagon1 on July 21, 2019, 2:32 pmhello everyone,, new here,, so my issue im having ,, is when i start it cold starts good but after a minute or two it freacks out dashbord locks up rpms say 5999 and and it runs like crap and dies,, i hit the back button and back to dash bored gauges it runs good again then it freaks out like two or three times ,, then it runs good after it warms up a little more ,,is that a coolant temp sensor problem or is there something else going on ??
You have an electrical interference issue. There is a good write up in the Electrical section for shielding the tach, blue, wire. Interference there will show maxed RPM values.
So did software the 198i update and adjusted CTS as per guide. Ok results to a point then shows consistently too high once fully warm and driving. I now have a new AC Delco sensor I want to install so riddle me this...
Do I just install Delco sensor and leave it at that? or
Do I recalibrate with the Delco sensor? or
Do I somehow disable/reset the CTS option in the new software?
hmmmm
Whollsee
Quote from whollsee on October 28, 2019, 4:28 amSo did software the 198i update and adjusted CTS as per guide. Ok results to a point then shows consistently too high once fully warm and driving. I now have a new AC Delco sensor I want to install so riddle me this...
Do I just install Delco sensor and leave it at that? or
Do I recalibrate with the Delco sensor? or
Do I somehow disable/reset the CTS option in the new software?
hmmmm
Whollsee
This is the problem with the calibration option. If you change sensors, you must recalibrate. This is why I suggest changing sensor in the first place. Can save a lot of trouble later.
You need to go back to the default values of the Coolant sensor calibration. Save your tune, save cal from ECU. Load the default V8 file, write cal to ECU. Write down the default values, then reload your saved cal. Input those values into your tune.