SG II Accuracy?
I'm hitting easy street
Joined: Nov 2009
Posts: 6,395
Likes: 27
From: Central Oregon
The fWT may be reading 39.9 and not rounding up. But that is as close between the 3 you can get. Guess I should have had the TFT up there. Oh well, coffee calls!
Hotshot
Joined: Apr 2010
Posts: 19,061
Likes: 238
From: Saratoga Springs,UT
Man Sean I was hopen you would put a thermometer in the Windsheild washer fluid too LOL
those temps look great that SGII is on the Money
I'm hitting easy street
Joined: Nov 2009
Posts: 6,395
Likes: 27
From: Central Oregon
Thought about the laser temp gun, but then I would just confuse myself! Heck I probably would have held it backwards and taken my own temp!
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 26
From: Middle Tn.
Incidentally, my tft matches the others after a cold soak.
Freshman User
Joined: Feb 2011
Posts: 49
Likes: 0
Huh, after about only 8 hrs soak my +6 idea temps were EOT 44, ECT 48. Anybody think those could be accurate? Didn't get an opportunity to let it sit longer, but I don't know why the coolant would be warmer than the oil....
So if my +6 idea is wrong that means the thermostat is cycling from 182 to 186 instead of 188 to 192. It's a relatively new thermostat and the numbers haven't changed since I put it in.
Any ideas? Still hoping the + 6 idea is maybe a possibility!
So if my +6 idea is wrong that means the thermostat is cycling from 182 to 186 instead of 188 to 192. It's a relatively new thermostat and the numbers haven't changed since I put it in.
Any ideas? Still hoping the + 6 idea is maybe a possibility!
I'm hitting easy street
Joined: Nov 2009
Posts: 6,395
Likes: 27
From: Central Oregon
That's an issue with trying to read temps for accuracy. The longer the soak the better. I know sometimes it is hard to get a longer soak, I can only do mine on weekends, weekdays, there is no way for me to get a 12 hour soak.
Did you run AE for the test also? ( I think I have you mixed up with the OP on the AE, sorry)
And I'm not quite following the +6. What that was going to do for you.
As for warmer coolant than oil, depends on the timing of the test. I would assume that as the outside temp comes up, coolant will follow, and oil would lag behind.
Did you run AE for the test also? ( I think I have you mixed up with the OP on the AE, sorry)
And I'm not quite following the +6. What that was going to do for you.
As for warmer coolant than oil, depends on the timing of the test. I would assume that as the outside temp comes up, coolant will follow, and oil would lag behind.
I'm hitting easy street
Joined: Nov 2009
Posts: 6,395
Likes: 27
From: Central Oregon
I had to go back and read one of your posts.
I think trying to get gauge to match the thermostat ratings isn't the right way to go about this. And I'm not sure if adding a 6 to the math codes has done much of anything. (not that I'm any where near smart enough to know what that would do.)
I would go back to the ECT without the 6.
TXD: 07E0221139
RXF: 046205110639
RXD: 3008
MTH: 000200010000
NAM: ECT
This matches everything I have put up so far, as you can see in the last posts.
Because the +6 ECT is matching the thermo ratings I'm thinking I've got it right, somebody wanna check me? BTW I have a 2005 Excursion with a late 2005 6.0, and what Ford tells me is the latest flash on it, maybe that has something to do with it?
I would go back to the ECT without the 6.
TXD: 07E0221139
RXF: 046205110639
RXD: 3008
MTH: 000200010000
NAM: ECT
This matches everything I have put up so far, as you can see in the last posts.
Hotshot
Joined: Aug 2006
Posts: 17,398
Likes: 317
From: Whittier, CA
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Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 26
From: Middle Tn.
Huh, after about only 8 hrs soak my +6 idea temps were EOT 44, ECT 48. Anybody think those could be accurate? Didn't get an opportunity to let it sit longer, but I don't know why the coolant would be warmer than the oil....
So if my +6 idea is wrong that means the thermostat is cycling from 182 to 186 instead of 188 to 192. It's a relatively new thermostat and the numbers haven't changed since I put it in.
Any ideas? Still hoping the + 6 idea is maybe a possibility!
So if my +6 idea is wrong that means the thermostat is cycling from 182 to 186 instead of 188 to 192. It's a relatively new thermostat and the numbers haven't changed since I put it in.
Any ideas? Still hoping the + 6 idea is maybe a possibility!
Lead Driver
Joined: Sep 2007
Posts: 8,180
Likes: 669
From: Scio, OR
There seems to be reason to trust the ECT codes that I've seen published here (without "tweaking" them), but at this point I'd want to see them compared to at least one different tool to be sure. The best comparison for accuracy would be to compare the values from at least 3 sources (or more) on a cold soaked engine. The chances of all of them misreading the PCM seem unlikely.
I have significant doubt, based on this thread, about the accuracy of the fWT value.
I have significant doubt, based on this thread, about the accuracy of the fWT value.
Freshman User
Joined: Feb 2011
Posts: 49
Likes: 0
I agree about matching the thermostat rating might not be the best route to go, just can't figure why the SG is reading lower for some. Plus I really like my temp delta with the +6, but don't want to be fooling myself into an expensive mistake either!
I would think the temp sensor should be reading what temp the thermostat is seeing, so theoretically they should match. Ive seen some owners delve into flushes and cooler changes, my fear is that it wasnt necessary as some posts indicated no change in the deltas / readings. Was hoping my experiment would help to avoid unnecessary costs / labor for some.
I know some xgauges needed a bit of tweaking to be 100%, and I'm thinking (hoping) that maybe the fWT or ECT does too.
I'm seeing that the fWT / ECT seems pretty accurate for most, but I can't still explain the 6 degree difference in seeing the thermostat cycle. May be minor but it's just a niggling problem for me that wont go away until I find a definitive answer, I'm weird that way!
I also bang my head against the wall quite a bit
I would think the temp sensor should be reading what temp the thermostat is seeing, so theoretically they should match. Ive seen some owners delve into flushes and cooler changes, my fear is that it wasnt necessary as some posts indicated no change in the deltas / readings. Was hoping my experiment would help to avoid unnecessary costs / labor for some.
I know some xgauges needed a bit of tweaking to be 100%, and I'm thinking (hoping) that maybe the fWT or ECT does too.
I'm seeing that the fWT / ECT seems pretty accurate for most, but I can't still explain the 6 degree difference in seeing the thermostat cycle. May be minor but it's just a niggling problem for me that wont go away until I find a definitive answer, I'm weird that way!
I also bang my head against the wall quite a bit
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 26
From: Middle Tn.
There seems to be reason to trust the ECT codes that I've seen published here (without "tweaking" them), but at this point I'd want to see them compared to at least one different tool to be sure. The best comparison for accuracy would be to compare the values from at least 3 sources (or more) on a cold soaked engine. The chances of all of them misreading the PCM seem unlikely.
I have significant doubt, based on this thread, about the accuracy of the fWT value.
I have significant doubt, based on this thread, about the accuracy of the fWT value.
Lead Driver
Joined: Sep 2007
Posts: 8,180
Likes: 669
From: Scio, OR
Yours have. But the OP and at least one other poster noted significant difference between the Scangauge fWT and another tool, notably AE. Frankly I trust the programmers at AE more. But without comprehensive testing you really can't know for sure.
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 26
From: Middle Tn.
That's what I was getting at. It isn't always the cheapest piece of equipment that's wrong. I've seen that in torque wrenches.