DIY ECU Flash

theeld · **Joined:** Tue Jan 04, 2011 11:46 am **Posts:** 30

My Jeep Liberty is running Yeti Mild Tune, stage 2 weeks kit, straight 3" exhaust. Have noticed that occasionally when I really step on it and likely get high turbo boost momentarily that engine will enter some sort of protection mode. Symptom is either severely reduced turbo, or maybe none at all. Amazing how gutless a diesel without a turbo becomes

Regardless, it is immediately remedied by a key cycle and restarting engine. Interesting no check engine light is produced when this condition occurs. Any others experience this?

flash7210 · **Posted:** Mon Aug 20, 2018 10:27 am

theeld wrote:

My Jeep Liberty is running Yeti Mild Tune, stage 2 weeks kit, straight 3" exhaust. Have noticed that occasionally when I really step on it and likely get high turbo boost momentarily that engine will enter some sort of protection mode. Symptom is either severely reduced turbo, or maybe none at all. Amazing how gutless a diesel without a turbo becomes

Regardless, it is immediately remedied by a key cycle and restarting engine. Interesting no check engine light is produced when this condition occurs. Any others experience this?

What you describe sounds like overboost.
Without a boost gauge, its hard to know exactly whats going on.
I've ran the Yeti 811 stage 2 and 4 tunes and never encountered a overboost condition.
Occasionally I've gotten underboost but that doesn't cause any kind of limp mode.

I would first check all the vacuum lines and solenoids for the turbo control.
Also check the MAP sensor.

I can pretty much guarantee that if you drive too long with overboost, it will set a code.

WWDiesel · **Posted:** Mon Aug 20, 2018 11:42 am

What you describe sounds like you are getting an "overboost" condition which throws it into "limp" mode.
As you stated, cycling key "resets" ECM back to normal.
Without a boost gauge, it is hard to determine what actual boost is going to.

The first thing I would recommend is to change the MAP sensor. It may be giving the ECM an erroneous pressure reading.
May want to also check turbo vanes and linkages and make sure nothing is sticking.

:SOMBRERO:

Yeti · **Posted:** Mon Aug 20, 2018 3:10 pm

for overboost I suggest the solenoid that act the vgt vane

WWDiesel · **Posted:** Mon Aug 20, 2018 4:47 pm

Yeti wrote:

for overboost I suggest the solenoid that act the vgt vane

That's another good item to check!

Part Number: 52109543AA :google:

https://www.idparts.com/turbocharger-va ... -3210.html

joelukex4 · **Joined:** Thu Sep 29, 2011 4:54 pm **Posts:** 386

Not to steal this discussion but my CRD keep getting a P0234 code for over boost. It does not go into limp mode. I clear the code but it comes back very soon after clearing. I replaced the MAP sensor 3 or 4 months ago. I replaced the boost solenoid probably 3 yrs ago for a P0299 under boost condition. Can this solenoid likely cause an over boost condition when it uses vacuum to create the movement of the variable turbo rod to adjust vane movement? I would expect only failure as under boost.

WWDiesel · **Posted:** Wed Aug 22, 2018 10:33 am

joelukex4 wrote:

Not to steal this discussion but my CRD keep getting a P0234 code for over boost. It does not go into limp mode. I clear the code but it comes back very soon after clearing. I replaced the MAP sensor 3 or 4 months ago. I replaced the boost solenoid probably 3 yrs ago for a P0299 under boost condition. Can this solenoid likely cause an over boost condition when it uses vacuum to create the movement of the variable turbo rod to adjust vane movement? I would expect only failure as under boost.

When did it start happening? Was it right after you replaced the MAP sensor? Maybe you got a bad one?
Boost is controlled by input from many sensors to the ECM which in turn sends a signal to the Turbocharger Vacuum Modulator which controls vane position on the turbo. (amount of boost)

The boost solenoid is simply an on/off electronic valve, it has no modulation function. It simply bottles up the vacuum in the vacuum reservoir when you shut the engine off. It opens when you start the engine.

I would suggest replacing the MAP sensor first to see if that cures the problem. :juggle:

joelukex4 · **Joined:** Thu Sep 29, 2011 4:54 pm **Posts:** 386

Probably a good place to start. It definitely happened after changing the map sensor but I don't remember the timeline. Could be a week, could be a month or more.

gbarron · **Joined:** Wed Aug 15, 2018 4:41 pm **Posts:** 15

Noob here...have a 2006 Liberty Limited CRD (Canada Version) and trying to read the ECU following all the steps in this thread. When I connect and hit "Read ECU" MPPS will ID the ECU and spit out the details in the upper RH panel then quickly flashes "switching to high speed" and immediately comes back with an error code and "no reply from ECU" across the bottom. I have tried running MPPS in VM XP as well as administrator in Windows 7 compatibility mode under Windows 10, but keep getting the same results. I tried reloading MPPS V13 twice but no dice. Anyone have suggestions or ideas what might be causing the problem?

Yeti · **Posted:** Mon Sep 24, 2018 4:30 am

gbarron wrote:

Noob here...have a 2006 Liberty Limited CRD (Canada Version) and trying to read the ECU following all the steps in this thread. When I connect and hit "Read ECU" MPPS will ID the ECU and spit out the details in the upper RH panel then quickly flashes "switching to high speed" and immediately comes back with an error code and "no reply from ECU" across the bottom. I have tried running MPPS in VM XP as well as administrator in Windows 7 compatibility mode under Windows 10, but keep getting the same results. I tried reloading MPPS V13 twice but no dice. Anyone have suggestions or ideas what might be causing the problem?

you have write what ? I hope a file like your original

gbarron · **Joined:** Wed Aug 15, 2018 4:41 pm **Posts:** 15

I have not written anything yet...just trying to read the current program in the ECU. To my knowledge the software in the ECU has never been re-flashed from factory, but I did buy the Jeep used so it is hard to say with certainty.

Yeti · **Posted:** Mon Sep 24, 2018 11:33 am

I think is win10 problem

gbarron · **Joined:** Wed Aug 15, 2018 4:41 pm **Posts:** 15

Yeti wrote:

I think is win10 problem

I have tried running it in Windows XP Virtual Machine as well with the same problem. Are you suggesting I find a laptop running XP or Windows 7 and try it?

vwroad87 · **Posted:** Mon Sep 24, 2018 1:57 pm

gbarron wrote:

Yeti wrote:

I think is win10 problem

I have tried running it in Windows XP Virtual Machine as well with the same problem. Are you suggesting I find a laptop running XP or Windows 7 and try it?

I've had no problems running from a Mac Laptop using an XP virtual machine FYI. I mean heck that even has to masquerade the serial ports.

gbarron · **Joined:** Wed Aug 15, 2018 4:41 pm **Posts:** 15

vwroad87 wrote:

gbarron wrote:

Yeti wrote:

I think is win10 problem

I have tried running it in Windows XP Virtual Machine as well with the same problem. Are you suggesting I find a laptop running XP or Windows 7 and try it?

I've had no problems running from a Mac Laptop using an XP virtual machine FYI. I mean heck that even has to masquerade the serial ports.

Yeah...I see several others have run in XP VM as well without any problems. Not sure what is going on...

Dez · **Posted:** Mon Sep 24, 2018 11:55 pm

I think your tool has issues, when it switches to high speed does it cause the abs and traction control lights to come on and give you the ding? I've used mpps on xp, windows 7 and windows 10. The only issue I had was when I used the USB 3.0 blue port on my laptops. It wouldn't write that way.

Squeeto · **Posted:** Tue Sep 25, 2018 12:36 pm

Added Sir Sam's 603 EGR/FCV/P0610 delete - stock tune to the first page.

gbarron · **Joined:** Wed Aug 15, 2018 4:41 pm **Posts:** 15

Dez wrote:

I think your tool has issues, when it switches to high speed does it cause the abs and traction control lights to come on and give you the ding? I've used mpps on xp, windows 7 and windows 10. The only issue I had was when I used the USB 3.0 blue port on my laptops. It wouldn't write that way.

When you say tool do you mean the cable? I will have to try again to see if the ABS/TC lights come on with a ding when it happens.

Dez · **Posted:** Tue Sep 25, 2018 9:00 pm

gbarron wrote:

Dez wrote:

I think your tool has issues, when it switches to high speed does it cause the abs and traction control lights to come on and give you the ding? I've used mpps on xp, windows 7 and windows 10. The only issue I had was when I used the USB 3.0 blue port on my laptops. It wouldn't write that way.

When you say tool do you mean the cable? I will have to try again to see if the ABS/TC lights come on with a ding when it happens.

Yes the cable

david.wilkins · **Posted:** Sun Oct 21, 2018 11:39 pm

Hey,

Has anyone done a mild tune for a 526?
I have Greybeast's 526 EGR/FCV delete - stock but am looking for a bit more and was hoping for bit more then stock.
Also having the P0403 and P1140 error delete would be good.
Thanks
David

DIY ECU Flash

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