Got my Scangauge II!

[NaterGator]

Originally Posted by JO MAOMA

what am i missing, is someone not running a oem thermostat or is
cpg's rig essentially air cooled even when towing on a steep grade....




....maybe my rig needs more work on the cooling system than i thought.

Just my experience. There is probably some variance and I don't know what most others see.

The FSM test procedure states that the thermostat should open between 176-183°F and lift at least 10mm by 203°F. Perhaps I just need a new tstat.

[e9999]

interesting

can one set an alarm on that reader?

Hard to believe that the mpg readings would be very accurate. What sensors -if any- does it use for that?

[FirstToy]

Wow, I'm surprised by my readings! This is just in-town today
ambient temps (95-100 degrees)
air intake temps (145-172)
Air Conditioner ON the whole time
stock temp gauge never moved from horizontal

-from cold to 185-190 (city streets, stop n go, easy)
-195-198 (freeway)
-parked for 15min -
-213 on startup-heat soak! (172 intake air temp), quickly went down to 193
-200-204 (freeway, slight grade)
-198-204 (city streets)

[cpg]

Originally Posted by JO MAOMA

what am i missing, is someone not running a oem thermostat or is
cpg's rig essentially air cooled even when towing on a steep grade....




....maybe my rig needs more work on the cooling system than i thought.

oem THERMO STAT. Just last weekend going up highway 17 never went over 190 going down went down to 170.

[FirstToy]

cpg,
wonder how your temps are so low? maybe I need a new radiator?
I have new fan clutch, t-stat, coolant, rad in good shape...

170-190 is a big difference than mine doing 190-204...

*oh i noticed the side plug on the Scangauge so i flush mounted right on the edge between the insturments and steering colum- shielded from glare, doesn't block the warning lights.

[cpg]

Originally Posted by FirstToy

cpg,
wonder how your temps are so low? maybe I need a new radiator?
I have new fan clutch, t-stat, coolant, rad in good shape...

170-190 is a big difference than mine doing 190-204...

Thats why I replaced the radiator. When I did ravens mod on the stock gauge I was shocked how often it was getting near the red. I had the scan gauge for a while before I changed out the cooling parts and was getting over 200 often but only when there was a hill involved. I think my old fan clutch cooled better than the new blue hup before it was modified. But after modifying it it seems to keep it about 5 degrees cooler. My intake air temps seem lower than most to I have never seen it over 145. I have a long copper pipe for my shower I dont think it helps cool any more maybe it does runs almost the length of the block?

The pic of the scan gauge was last March in Baja about 90 degrees outside.
This is before I modded the fan clutch. On any grade it would rise to 195. After modding it I can keep it around 190.

[Trunk Monkey]

Originally Posted by e9999

Hard to believe that the mpg readings would be very accurate. What sensors -if any- does it use for that?

Very accurate. You reset when you fill and it learns. Miles driven divided by fuel used, pretty basic.

[e9999]

Originally Posted by FZJFillmore

Very accurate. You reset when you fill and it learns. Miles driven divided by fuel used, pretty basic.

and how does it know accurately the fuel used, exactly?

[e9999]

cpg, I wonder if there is something off with your gauge or sensor or thermostat?

if the thermostat starts to open around 180-185, it is highly unlikely you would get any lower than that coasting down at high temperatures outside since the fan / rad are no longer in the picture when the thermostat is closed.

[NaterGator]

Originally Posted by e9999

and how does it know accurately the fuel used, exactly?

Because it can calculate the GPH based on the parameters the ECU provides.

Trust me, it's accurate. Always within 1% all said and done at the end of the tank.

[cpg]

Originally Posted by e9999

cpg, I wonder if there is something off with your gauge or sensor or thermostat?

if the thermostat starts to open around 180-185, it is highly unlikely you would get any lower than that coasting down at high temperatures outside since the fan / rad are no longer in the picture when the thermostat is closed.

I am not sure if the gauge is correct. While coasting down hill I am pretty sure the air flowing thru the engine bay will cool it off easily since it is idling only also the water in the rad will be cooled.

[e9999]

Originally Posted by NaterGator

Because it can calculate the GPH based on the parameters the ECU provides.

Trust me, it's accurate. Always within 1% all said and done at the end of the tank.

that's good. Not sure how the ECU can quantify gas flow that accurately, though. From injector parameters?

on the 100 Navsys, the avg mpg is easily off by 0.5 mpg out of 17 or so, in my experience.

[FirstToy]

after talking to some people, I think the temps at 190-200 are normal. What I don't know yet is how the temps react in trail conditions, but will keep an eye on it.

[Maynurd]

i went over rubicon and my temp maxed out at 191. Thats with new rad tstat fan clutch and hoses.

i think it maxed out going up 49

[Trunk Monkey]

Originally Posted by FirstToy

What I don't know yet is how the temps react in trail conditions, but will keep an eye on it.

Been really good for me. Usually don't have the AC on tho.

[livinoffroad]

While mounting your Scangauge II to your 1995 fzj 80, has anyone noticed how many wires go to the OBD II port ? I count 4, but don't know if that is factory original, or if the PO has been in there before me. I would appreciate some feedback, as my Scangauge II is on order.

[JO MAOMA]

four wires is the correct answer.....

[beno]

Originally Posted by FirstToy

after talking to some people, I think the temps at 190-200 are normal. What I don't know yet is how the temps react in trail conditions, but will keep an eye on it.

Well, I've been borrowing a Scangauge for a few days (thanks Ruadhigh) and as expected my temps. rarely every get over 194*....

Some recordings:

City/highway/traffic/idling driving style: IA: 104*-127*; WT: 188*-200*.

The only time the WT ever went over 200* was after the engine was shut off and immediately after that the temps sometimes read around 204*.

I am going to wheeling on Sunday and I am going to bring this again and see how it does after about 3-4 hours of stop and go, slow moving, high torque, low air movement situations.

I feel much better about my cooling system (though I am overly anal about it anyway) after seeing these readings.

Useful tool. I'm going to get one in the future.

Cheers.
-onur

[FirstToy]

onur,
I would love to hear how the temps react. On a recent trip, my truck lived at 195-ish no matter what. It hit 203's on a freeway grade pushing it... from cold, going easy around town, it is around 185

maybe I have to look at my radiator...

thanks

[e9999]

when I'm wheeling, in relatively hot weather (say 90F), at low speeds but reasonable power I'm usually around 195-205F (from memory). If I'm doing steep hills up in low in hot weather and low speed for long periods of time, it can go up to 215 or even 220F or so but that's rare.

[FirstToy]

Eric, you being you, I imagine your cooling system is in top condition?

[peepers]

has anyone programmed their scan gauge II for 4.88 gears and 35" tires? i can't figure out how to do that...

help please.

[e9999]

Originally Posted by FirstToy

Eric, you being you, I imagine your cooling system is in top condition?

well, I thought so, but now I've read some posts about folks getting much lower temps that what seemed normal earlier, so I may have to dig in...

I haven't done anything to the fan yet but that seems interesting.

[FirstToy]

peepers,
the way I did it is to go into the MPH choices-->MPH or KPH-->and then there is a % correction in 1% incriments. So if you are 5% off, punch it in.
sorry, don't know how to calculate gear+tires... if you have gps, you can compare the scangauge and gps and punch in % until it matches...

Eric, you mean you don't have the blue fan clutch or that you want to add an aux fan like Romer? Do you have a new radiator?

[corsair23]

Originally Posted by FirstToy

peepers,
the way I did it is to go into the MPH choices-->MPH or KPH-->and then there is a % correction in 1% incriments. So if you are 5% off, punch it in.
sorry, don't know how to calculate gear+tires... if you have gps, you can compare the scangauge and gps and punch in % until it matches...

x2...Unless Scangauge has updated the software to handle this differently you simply go in and adjust the "adjustment %" up or down compared to stock. Mine is like a 5.45% increase compared to stock and IIRC the Scangauge offers adjustments at .1% increments so you can get pretty close.

I know (when I remember) to input my #'s on fillup it is pretty close to spot on with what Scangauge estimates I used fuel wise to what I actually put in.

[peepers]

Originally Posted by FirstToy

peepers,
the way I did it is to go into the MPH choices-->MPH or KPH-->and then there is a % correction in 1% incriments. So if you are 5% off, punch it in.
sorry, don't know how to calculate gear+tires... if you have gps, you can compare the scangauge and gps and punch in % until it matches...

Eric, you mean you don't have the blue fan clutch or that you want to add an aux fan like Romer? Do you have a new radiator?

Originally Posted by corsair23

x2...Unless Scangauge has updated the software to handle this differently you simply go in and adjust the "adjustment %" up or down compared to stock. Mine is like a 5.45% increase compared to stock and IIRC the Scangauge offers adjustments at .1% increments so you can get pretty close.

I know (when I remember) to input my