High ECT
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Senior User
Joined: Aug 2006
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From: Roseburg, Or
Yea i understand. Im gonna work on this some more. Any Livelink experts feel free to chime in.
Lead Driver
Joined: Jul 2004
Posts: 6,951
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From: Foothills, CA
The numbers i have been basing this thread on were from digital gauge, quadzilla commander. This evening i ran the ect with SCT livelink and was getting an ect of 196*f, while my gauge was reading 205*f. Livelink is new to me and im unable to figure out the readings for eot.
This weekend when i heard my fan kick on it wasnt loud like many have describe on this forum, it was barely noticeable. With the readings i got tonight, im really confused and dont know what to believe.
This weekend when i heard my fan kick on it wasnt loud like many have describe on this forum, it was barely noticeable. With the readings i got tonight, im really confused and dont know what to believe.
Senior User
Joined: Jan 2011
Posts: 125
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From: Fairbury IL
Head Gasket test was to drive the truck while checking cooling system pressure. It shot up IMMEDIATELY when the tech stepped on the go pedal.
The cracked head thing is a 'probable' - the tech said he smelled diesel in the coolant.
Good luck with your situation!
Zach
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Senior User
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From: Roseburg, Or
The Commander wire taps into the ECT sensor.
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Senior User
Joined: Aug 2006
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From: Roseburg, Or
The ecu uses the ect sensor for the vehicles ect values right? The ecu doesn't gather that info another way does it?
This morning on way to work my gauge was reading 205* and livelink showed a max of 192*. Livelink monitors the ecu through the odb ii port, so i would think it is accurate. My gauge is wire tapped into the ect sensor (I'll check tap).
I was thinking bad ect sensor, but that sensor is where the ecu gets that data also right? So livelink should read the same as gauge.
This morning on way to work my gauge was reading 205* and livelink showed a max of 192*. Livelink monitors the ecu through the odb ii port, so i would think it is accurate. My gauge is wire tapped into the ect sensor (I'll check tap).
I was thinking bad ect sensor, but that sensor is where the ecu gets that data also right? So livelink should read the same as gauge.
Lead Driver
Joined: Jul 2004
Posts: 6,951
Likes: 512
From: Foothills, CA
I don't know if just tapping into a sensor can cause an issue, but others here with more experience said that is a big No-No. Both have to convert an electric signal (volts I assume) to a numeric value. Could be different calc's...
But yes, the ODBII is the same as what the ECU is using, in fact IRRC the number is coming from the ECU...
But yes, the ODBII is the same as what the ECU is using, in fact IRRC the number is coming from the ECU...
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Senior User
Joined: Aug 2006
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From: Roseburg, Or
So i went and paid 40$ for a diagnostic. They were getting ect temps 10* lower than what my gauge is reading. Their reading was the same add my livelink reading. So currently my gauge its reading 202° ect, but my livelink reads 193°. So my gauge is reading inaccurately. But thus still doesn't explain why my fan came on slightly thus weekend.
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Joined: Oct 2010
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From: Ouray, CO
[QUOTE=emmagator;13183328 But thus still doesn't explain why my fan came on slightly thus weekend.[/QUOTE]
The oil temp also factors into the fan speed. So if you can't read the engine oil temp with the odb reader you have you are stuck. Also be aware the engine will defuel if oil temp gets too high.
The oil temp also factors into the fan speed. So if you can't read the engine oil temp with the odb reader you have you are stuck. Also be aware the engine will defuel if oil temp gets too high.
Hotshot
Joined: Apr 2010
Posts: 19,072
Likes: 242
From: Saratoga Springs,UT
It might be Jacked up where the wire is spliced in
Best thing is to get that spliced in stuff OFF ASAP also any other gauges that are spliced in get them OFF
Spliceing gauges causes LOTS of Problems
And get a Gauge that Pulls all the STuff from the OBDII PORT
To have ANY Chance at fixing it you must see what the PCM Sees so this will be Done VIA the OBDII PORT
Best thing is to get that spliced in stuff OFF ASAP also any other gauges that are spliced in get them OFF
Spliceing gauges causes LOTS of Problems
And get a Gauge that Pulls all the STuff from the OBDII PORT
To have ANY Chance at fixing it you must see what the PCM Sees so this will be Done VIA the OBDII PORT
Lead Driver
Joined: Jul 2004
Posts: 6,951
Likes: 512
From: Foothills, CA
So i went and paid 40$ for a diagnostic. They were getting ect temps 10* lower than what my gauge is reading. Their reading was the same add my livelink reading. So currently my gauge its reading 202° ect, but my livelink reads 193°. So my gauge is reading inaccurately. But thus still doesn't explain why my fan came on slightly thus weekend.
Do you have a Droid phone by any chance? or an Iphone, or either one in a pad device? It's not much to get the app that would give you a whole new view into what is going on under the hood. I'm becoming less and less of a Scangauge promoter -- it's just what was 1st available to do this sort of thing and is really basic and hard to set-up. If you have an Android phone go out and buy Torque pro for $4.95 and a bluetooth ODBII connector (ELM 327 v1.5 or higher) for maybe $12 and get the Ford specific PIDs that come free with Torque. Or if you have an Iphone or tablet get DashBoss and it's data gateway ($150ish). Fan speed is just one of many things you can just select to monitor in real time; or if you wish put to a log file for analysis later, and it is JUST a pick and click operation with cool gauges to choose from...
Best money I've spent very little of almost ever....
Thread Starter
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Senior User
Joined: Aug 2006
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From: Roseburg, Or
The fan does come on every once in a while and that is normal, but it isn't an on/off thing the fan is variable speed and sometimes you won't even notice it. You shouldn't have any spliced wires to OEM sensors.
Do you have a Droid phone by any chance? If you have an Android phone go out and buy Torque pro for $4.95 and a bluetooth ODBII connector (ELM 327 v1.5 or higher) for maybe $12 and get the Ford specific PIDs that come free with Torque. Or if you have an Iphone or tablet get DashBoss and it's data gateway ($150ish). Fan speed is just one of many things you can just select to monitor in real time; or if you wish put to a log file for analysis later, and it is JUST a pick and click operation with cool gauges to choose from...
Best money I've spent very little of almost ever....
Do you have a Droid phone by any chance? If you have an Android phone go out and buy Torque pro for $4.95 and a bluetooth ODBII connector (ELM 327 v1.5 or higher) for maybe $12 and get the Ford specific PIDs that come free with Torque. Or if you have an Iphone or tablet get DashBoss and it's data gateway ($150ish). Fan speed is just one of many things you can just select to monitor in real time; or if you wish put to a log file for analysis later, and it is JUST a pick and click operation with cool gauges to choose from...
Best money I've spent very little of almost ever....
Im going to continue to investigate this situation and get my gauge figured out. Its not actually a splice, if that matters, but a wire jumper. It clips onto the ect sensor wire poking through making contact with wire.
Anyway thanks for the info.
Hotshot
Joined: Apr 2010
Posts: 19,072
Likes: 242
From: Saratoga Springs,UT
[quote=emmagator;13184153]
. Its not actually a splice, if that matters, but a wire jumper. It clips onto the ect sensor wire poking through making contact with wire.
quote]
The Fact remains the SAME
You or Someone spliced into the circut One Way or Another this Adds Extra wire to the Circut and also Adds More Electrical Resistence with the Added wire
The PCM Uses Electrical voltage to sent too and from each sensor The return Voltage will be the sensor operating value
The More wire the return signal has to go threw the more resistence you have and the Bigger the voltage drop will be
Odds are Both Gauges are reading wrong The Gauge reading off the OBDII Port is likely the closest but could be Off some
. Its not actually a splice, if that matters, but a wire jumper. It clips onto the ect sensor wire poking through making contact with wire.
quote]
The Fact remains the SAME
You or Someone spliced into the circut One Way or Another this Adds Extra wire to the Circut and also Adds More Electrical Resistence with the Added wire
The PCM Uses Electrical voltage to sent too and from each sensor The return Voltage will be the sensor operating value
The More wire the return signal has to go threw the more resistence you have and the Bigger the voltage drop will be
Odds are Both Gauges are reading wrong The Gauge reading off the OBDII Port is likely the closest but could be Off some
Lead Driver
Joined: Oct 2010
Posts: 5,420
Likes: 16
From: Ouray, CO
Alsp the fan is always turning.
Typically 300-600 rpm always.
800-900 sometimes when up to temp and a/c is on. Really need sg2 or odb2 reader otherwise you are either worrying about everything or unaware of what -may - actually be wrong.
Good luck.
Typically 300-600 rpm always.
800-900 sometimes when up to temp and a/c is on. Really need sg2 or odb2 reader otherwise you are either worrying about everything or unaware of what -may - actually be wrong.
Good luck.
Lead Driver
Joined: Feb 2011
Posts: 8,241
Likes: 155
From: L.A. (Lower Alabama)
The ecu uses the ect sensor for the vehicles ect values right? The ecu doesn't gather that info another way does it?
This morning on way to work my gauge was reading 205* and livelink showed a max of 192*. Livelink monitors the ecu through the odb ii port, so i would think it is accurate. My gauge is wire tapped into the ect sensor (I'll check tap).
I was thinking bad ect sensor, but that sensor is where the ecu gets that data also right? So livelink should read the same as gauge.
This morning on way to work my gauge was reading 205* and livelink showed a max of 192*. Livelink monitors the ecu through the odb ii port, so i would think it is accurate. My gauge is wire tapped into the ect sensor (I'll check tap).
I was thinking bad ect sensor, but that sensor is where the ecu gets that data also right? So livelink should read the same as gauge.
If you used a blue "snap tap" to connect the wire you may want to replace it. Those things are terrible. Guaranteed to be a problem sometime in the future.
There's no such thing as too big a wire. The gauge can add load (amperage) to the circuit reducing the voltage back to the PCM and cause it to read wrong, but because it is parallel it doesn't add resistance. If the gauge were wired in series it would(could) add resistance.