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6v92

For those that have a wonderful 6v92 do any one use a program to read ecm besides a pro-link. I am trying bluefire all gauges seem to work except coolant temp is way off from dash gauge. Bluefire never reads above 157 when dash gauge reads 180or a little more. I don't have a pro-link to see what it reads unless someone in DFW area has one to let me use.

Ken
Ken & Peggy
91 GV  U300 40'
DD 6v92
Build #3819
2023 Canyon Denali 4x4 crew cab

Re: 6v92

Reply #1 –
Quote from: kpbowser –
For those that have a wonderful 6v92 do any one use a program to read ecm besides a pro-link. I am trying bluefire all gauges seem to work except coolant temp is way off from dash gauge. Bluefire never reads above 157 when dash gauge reads 180or a little more. I don't have a pro-link to see what it reads unless someone in DFW area has one to let me use.
Ken
If you can't locate someone with a Pro-Link, I suggest just installing a mechanical gauge in one of the plugs in the cylinder head so you can read it with the engine door open. They will take either a 3/8" or 1/2" extension on a breaker bar to remove the plug. This is an important reading so important to know how far the instrument panel gauge is off. The Bluefire should read from the DDEC and unless the sender is faulty, should give an accurate reading. Either sender is cheap and easily replaced.

Our 1993 U300 normally runs just above the 180 degree mark on the dash gauge. The Pro-Link reads only slightly lower.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: 6v92

Reply #2 –
This is the type of mechanical gauge I installed in our generator. Easy to install and cheap. Very accurate. Photos show the gauge and the tools needed to install it either in the Detroit or generator. In addition to the tools in the photo, you need a breaker bar. I recommend Teflon paste rather than tape to install the gauge. These tools were used to install both the temperature and fuel pressure gauge on the generator.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: 6v92

Reply #3 –
Quote from: Pierce & Gaylie Stewart –
This is the type of mechanical gauge I installed in our generator. Easy to install and cheap. Very accurate. Photos show the gauge and the tools needed to install it either in the Detroit or generator. In addition to the tools in the photo, you need a breaker bar. I recommend Teflon paste rather than tape to install the gauge. These tools were used to install both the temperature and fuel pressure gauge on the generator.

Pierce

Can you attach a bigger picture to show where exactly the gauge is installed?
1991 Grand Villa U300

Re: 6v92

Reply #4 –
Don't have one in my library right now but if you have a GV with a side generator, look close to the radiator screen close to the injection pump and just to the right of the lift ring for generator removable. You should see a threaded plug (can't see threads until your remove it) with a square recess. I think it is 1/2" so the extension fits in the recess and you just turn it CCW to remove it. Have the gauge ready to install so you lose the minimum amount of coolant.

This gauge is only good to use with the generator door open but I find it handy to check to make sure things are staying cool. It really helped last year with the power outages at the house where the U300 supplied juice to the house for days at a time. Best way would be to have an electrical sender and a gauge on the dash of the coach.

Let us know what Foretravel you have. Not a rap on the knuckles but it really helps to have your year, model, etc in your information when you post so we can help faster.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: 6v92

Reply #5 –
Pierce, where would it go in the Detroit with rear radiator?

Ken
214-587-2135
Ken & Peggy
91 GV  U300 40'
DD 6v92
Build #3819
2023 Canyon Denali 4x4 crew cab

Re: 6v92

Reply #6 –
Quote from: kpbowser –
Pierce, where would it go in the Detroit with rear radiator?

Ken
214-587-2135
The rear radiator models don't have the pump, motor and fans as the rear fan does the trick. No belt to worry about. With the 102 inch wide model, Foretravel went to a side radiator to cool the 50 extra horsepower plus they changed transmissions and added the Jake brake. Different radiator the following year with two fans. Lots of changes.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: 6v92

Reply #7 –
Ken, I have a VMS system on my rear radiator 6V92.  But it works the same as the Bluefire.  I would think it either reports a valid temperature or it doesn't (ie. blank value).  Since it's reporting a low number I would guess the engine computer temperature sensor is failing.  Generally I put 10x the confidence in the VMS reading than the dash gauge.

To check the true engine temperature just use a IR gun.  They are not expensive anymore and many many uses for them elsewhere on the coach.  In my testing I have found the two return flow metal tubes (leading from each head on the engine and going to the top of the radiator) to be very close to what the gauge and the VMS reads for temperature.  There just isn't good access to read a permanent temperature gauge with a rear radiator; you would have to climb on top of the engine with your head down between the radiator and the engine to see it.
John Fitzgerald
1991 U300 (SAI) Side Aisle Island Bed 40'
Detroit 6V92 with Allison Retarder
Meridian (Boise), Idaho

Re: 6v92

Reply #8 –
Thanks to all for the replies. Is this sensor something a person can change or even get to. I looked on line to see where sensor is located but have not had success. If it completely fails will ecm shut down the engine.

Ken
214-587-2135
Ken & Peggy
91 GV  U300 40'
DD 6v92
Build #3819
2023 Canyon Denali 4x4 crew cab

Re: 6v92

Reply #9 –
Ken,

It's been a long time but as I remember, the sensor for the DDEC is on the driver's side thermostat housing right above the secondary fuel filter and close to the bogus block heater. DDEC sensors usually have a protective cover, not just wires with screw terminals.

With your rear radiator, it's going to be harder to get to it.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: 6v92

Reply #10 –
Ken, I think it's pretty rare to have a DDEC temp sensor go bad.  I would verify which gauge is correct with an IR gun.
I do not know where the sensor is.  Pierce's suggestion is good.
John Fitzgerald
1991 U300 (SAI) Side Aisle Island Bed 40'
Detroit 6V92 with Allison Retarder
Meridian (Boise), Idaho
 

Re: 6v92

Reply #11 –
Will look for sending unit and will get ir gun to check return tubes to radiator. Also check temp at top and bottom of radiator. Thanks for everyone's help so far. I believe if it was really running this cool 150ish it would be blowing white smoke like our old IH tractors would do.

Ken
214-587-2135
Ken & Peggy
91 GV  U300 40'
DD 6v92
Build #3819
2023 Canyon Denali 4x4 crew cab