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Product Questions on the ECO Tune and Trailer Towing  RSS feed
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zoom_camper

Joined: 30/06/2010 20:54:18
Messages: 4
Location: Bryan, Ohio
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Looking at Eco Tune but I have questions, I tried to review all of the site and forums here and hope that I didn't aska question that was not already addressed.

After I replaced the fuel filter housing the “shutter” disappeared, so I’m thinking it was not the TC but air in the fuel as the cause. I was able to tow my trailer over the weekend and at no time did I have any shutter.

The F37 recall did replace the original TC and detune the engine on most models but the front pump and some internal parts were also on the list depending on build dates. My build date (June 9th 2005) only had the TC replaced and the engine detune that is why the shift points did not change. Sound like D-C was cleaning out their warehouse of spare parts when they built these units for the US market.

The service work order paperwork shows the CRD was kept for a day and a half for the F37, while the ball joint was less than a day, confused. The TC was replace and the fluid/filters. No part number on the TC it was a “F37 KIT”.
When I bought my CRD part of the purchase agreement was that it was able to pull my trailer. Part of my test drive included my 18’ camper in-tow; happily it did as well as the ’98 Tahoe. And got twice the mileage while towing, since the F37 I wish I had my Tahoe back.

Questions I have:
1. I live about 2 hours from Wixom and go there on business trips; can I bring my CRD in for the program modification? How long does the reprogram take?
2. Is the difference between ECO Tune and ECO Tune w/Full Torque: Eco Tune does not have the notes l 335 ft-lb available (at 1800 RPM) in overdrive(s) as where the Full torque tune does?
3. Do all of the fault or CHECK ENGINE codes for trouble shooting work? The EGR valve I believe does not work as you explained.
4. Do you need to install an Exhaust Gas Temperature gage with the ECO tune? I would like to have one but do not know where to place the sensor (how close to the turbo) or can it be placed in the exhaust pipe leading away from the turbo.
5. Will the re-tune shorten engine life? My expatiation is at least 300,000 miles before a rebuild is necessary.
6. Will the ECO tune allow the CRD to maintain speed (60 MPH) while towing on the Ohio turnpike (West side of Ohio in the flatland) without the transmission downshifting when passed by a semi? (engine runs at 3100 RPM when transmission downshifts to maintain speed and temperature goes up) On overpasses the rig slows down 5+ mph as if the engine is overloaded, and then downshifts. (cruise control is on, oh no shutter)
7. While towing; can I run the air conditioning without overheating? Gauge shows up to 3 bars past the middle with the A/C running. Without the A/C running it’s at the middle. I know there was TSB on this, but I do not believe my dealer re-flashed the temperature gage.
8. As a last resort will this program work with lower gears like 4.1:1? (As I am considering changing them to have more power to pull my 18’ 3,022# camper, gross weight is just under 4100# loaded (truck scale), the Jeep has 3 people and no luggage weight).

Thanks,

Aerolite Zoom 180FD
Liberty CRD
Dead Stock
GreenDieselEngineering
[Avatar]

Joined: 10/07/2009 07:25:47
Messages: 363
Location: Southeast Michigan
Zoom_camper,

I hope to address all your questions below:

1. Yes you can arrange to bring the CRD down for an in-vehicle reprogram, it takes about 10 minutes to complete.
2. The torque numbers posted on the website for the ECO tune are in "unlock" mode and this is the same torque output of the "full torque" ECO tune. With the base ECO tune we limit the torque outpout when the TC is locked to a limit around 280 ft-lb.
3. Yes all the faults work as stock.
4. No need for an EGT, but it is a nice to have. For testing purposes we measure EGT downstream of the turbo about 10-15 cm with a tap in the exhaust downpipe.
5. No, the retune will not shorten engine life, it should increase it as the exhaust temps are reduced and the soot accumulation in the engine oil is reduced by about 65%.
6. It will help, but it is dependent on trailer weight and % grade. With an aftermarket TC the torque in lock-up can be increased enough to prevent unwanted downshifting.
7. Yes you can run AC while towing. A 3/4 gauge reading is not hot for this engine, it would need to be pegged in the red zone before the coolant temp liit is reached. The engine will automatically turn off the AC if necessary and limit fuel injection to prevent overheating. The gauge calibration is garbage!
8. The tune will work with any gear ratio.

Let us know if we can be of further assistance.
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JoBo

Joined: 01/07/2010 20:32:46
Messages: 2
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Zoom-Camper.

I originally had the ECO tune and it helped a little while towing beside the other benefits. Eventually the TC and front pump were replaced and I updated to the full torque version. The original front seal is no longer available so the front pump was replaced as it is standard procedure when replacing the TC to replace the front seal. The pump/seal does not have to be replaced and many don't but is this a place to be "penny wise and pound foolish"?

Looking at the torque graph you'll see the Eco full torque has a little more torque then we originally had. It tows our 3000-3500# trailer like a dream without downshifting and even got 1 mpg better fuel mileage on a 1400 mile trip we took a month and a half earlier when I had the standard Eco tune and tc. Not to mention a much more relaxed drive

If you get the new TC and full torque tune you will be saying "Tah WHO??"
bigmaho1

Joined: 16/08/2009 09:43:45
Messages: 20
Location: Mt Kisco, NY
Offline
Hi Guys,
Off topic, but concerns towing. I'm finally getting a cargo trailer with brakes. I got tired of hauling 3500 lbs up and down the Rockies without them. Anyone know how to wire an electric brake controller into the CRD? I have the factory hitch and 7 pin which has a 'brake controller' pin, but I can't find anyone who knows if there is an internal plug I can 'T' into or if I have to find wires and solder away.
Thanks

btw, just did the fuel filter/water separator swap. And yes, my old one did have burn marks and fuel leaks in the connector.

2006 CRD w/ Eco Tune, TC tune, new modified fuel filter/water separator and new Mopar TC
2006 CRD Ltd Eco-tune.
Jeep Patriot (to keep the kids away from my diesel
WXman
[Avatar]

Joined: 29/01/2010 14:53:49
Messages: 28
Location: Kentucky
Offline
The wire for "brake" is located behind the driver's kick panel (under the hood latch release) inside a white connector box. Look at the wire loom, find that little white box.. and the "brake" wire should be inside. The other connection gets spliced into the brown/white wire going into the brake pedal switch above the pedal. Then of course just run power and ground through the firewall to the battery. Bingo, you're ready to hook up your brake controller.

'05 Liberty CRD Limited
Factory Off-Road Package
Daystar spacer lift/Conduit washers
Skyjacker H7088s in the rear
Renegade wheels
255/70-16 General Grabber AT2s
GDE HOT Tune
EHM
No clutch fan
"Euro" TC
bigmaho1

Joined: 16/08/2009 09:43:45
Messages: 20
Location: Mt Kisco, NY
Offline
WXman wrote:The wire for "brake" is located behind the driver's kick panel (under the hood latch release) inside a white connector box. Look at the wire loom, find that little white box.. and the "brake" wire should be inside. The other connection gets spliced into the brown/white wire going into the brake pedal switch above the pedal. Then of course just run power and ground through the firewall to the battery. Bingo, you're ready to hook up your brake controller.


Simple, Thanks!!

2006 CRD w/ Eco Tune, TC tune, new modified fuel filter/water separator and new Mopar TC
2006 CRD Ltd Eco-tune.
Jeep Patriot (to keep the kids away from my diesel
 
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