I received my Xede from Vishnu 45 days ago, installed it, loaded up the V360 (non-SMART) map per Shiv's recommendation. Life was good...for about a month. Couple weekends ago my baby begins to stumble & choke. Rough idle between 800 and zero, have to flutter the throttle to keep her from stalling. She stumbles all the way through the RPM range, feels like the fuel delivery is all messed up.

Then a CEL goes. I plug in my CReader and it shows P0102 (low MAF sensor reading). I reset it and it comes right back on. Feels like the car is in limp-home mode.

I pull my HKS RS intake and put the stock airbox back on. Same thing happens again the next day. Car chokes and stumbles while driving, throws a P0102 again.

I pull the glovebox and the LED on my Xede is OUT. When I restart the car, the Xede flashes red for a few seconds then goes out. I then unplug the Xede and everything is back to normal -- except for the extra power :-(

When I get home that night I plug the Xede harness back in and start her up. Xede goes greeen and works fine. Next day green lights again in the morning. I leave my office at 3PM (car has been parked all day) and the Xede flashes red and goes blank again, CEL comes on (P0102), rough idle etc.

It continues to happen daily. She runs perfectly for a while, then suddenly the Xede goes red or simply goes out altogether. Sometimes it will happen while driving, at a traffic light, under partial throttle, no particular pattern. Other times, it will happen when the car has been sitting all day (like after work).

The only pattern I can put on it is that it generally happens later in the day, never on first-start in the morning. This is Florida, hence later in the day means heat, but if that's the case then why has it only started now after running perfectly for a month or more? The weather has been warm since early March.

I have checked all my wiring, made sure my ground connection is solid, made sure the harness is not touching anything metallic etc.

WHAT THE HECK?? Anyone had similar problems? Could it be that the Xede itself is faulty or the wiring harness?

I suspect the harness (this is my second harness...the first I received with my Xede had a bad hot wire) but again, it's been working perfectly for a month and been neatly tucked away behind the factory ECU so there is no chance of physical damage to the harness.

I've left a number of messages for Vishnu but can't seem to reach anyone at their office. HELP!!

 

Did you try reloading/burning the maps? I've seen this error before, but it's always occurred when there was an error in the map upload or a firmware update.


EDIT: another idea -- Could the map switching wires be touching and causing the the Xede to switch to bank 1 which doesn't have a map loaded on it? If there's no map in the second bank you'll get a red LED.

d

 

I have my map switching wires capped off and insulated, so they're definitely not touching.

Will hook up my laptop this morning & check the maps...but how could the maps suddenly go bad after a month?

I just purchased the XEDE at the end of Feb 2006, so I'm assuming that it already has the latest firmware...am I wrong?

The one thing that confuses about that potential solution is that I understood from the XEDE documentation that if the XEDE had no map (let's say in the case of the switching wires touching) that the XEDE would have a neutral effect on the stock ECU but not a negative effect.

 

Today's update:

While driving to my office, about 2 miles, to get my laptop (to check the maps) the XEDE bunks out while coasting (after about 4500 RPM thru 4th gear). XEDE starts flashing red & green and the car exhibits symptoms (rough idle, stumbling, difficult acceleration).

I get to my office, run inside, grab the laptop, go back outside and plug it in. Turn the key to on position, and the XEDE is operational again. I check the XEDE info, which is as follows:

Hardware revision: Ba
Hardware config: S
Software: V3.2.0.3 20 July 2005IP

I upload & burn fresh V330+ non-smart maps just taken from the Vishnu website today. Everything looks fine.

I enable the data-logging for the ride home. When I go to start the car, XEDE flashes orange, then red, then the LED goes out. XMap gives me this error: "Your XEDE is V2 and XMap version is V3. Either upgrade XEDE to V3 or use V2 XMap software". WTF?

I unplug XEDE, drive home with stocker ECU (2 miles). When I get home, just for sh*ts & giggles, I plug XEDE back in. It's working again! Plug in my laptop and check the maps for about 60 seconds, then XEDE flashes red & green and loses connection to XMap software.

Do I have a bad unit here? What the heck is going on? As you can tell, I am some-kinda FRUSTRATED

 

Make sure the crimp on the ground wire eyelet is solid. I found mine was loose causing similar intermitent problems, I ended soldering the wire to the eyelet to keep it from ever happening again.

 

Sorry to hear about your problems. On the top of the XEDE, next to the LED, what letter is printed? M or S?

-shiv

 

They wouldn't. I was only commenting that I had seen that maf DTC when I had loaded a bad map.

That's what is supposed to happen. However, if bank has a corrupted map or something weird things might happen.

Just so there is no confusion in what I am suggesting. If you reflash the firmware of the unit, it clears both map banks. In that case there really is no map loaded and the Xede acts as a simple pass through.

d

 

Shiv:
I have the letter "M" printed next to the LED.

Jorge T:
I checked the crimp on the ground wire and it is solid. To test I hooked up the XEDE, started the car (green light on XEDE) and disconnected the ground wire with the engine (and XEDE) running but could not reproduce the same behaviour. The XEDE green LED stayed solid even when I removed the ground.

 

bump for help!

 

Call Vishnu to see what they can do. Could be a bad XEDE, so have them diagnose it in Cali.

l8r)

 

Yeah, I mailed it to them 2 weeks ago...haven't heard anything since. Left a few messages and emailed them but no return phone calls or emails.

 

Bump for answers...

 

I fixed the xede, and it was sent back out this past week. It was a map switch problem. It would get stuck in a constant map change transition, so the xede's base firmware had to be reloaded (something the customer can't do). It has the proper map you asked for as well.

 

Mine is doing the exact same thing. I guess I'll have to remove the Xede and mail it in?

 

I think I have something similar to this problem. The Xede flashs red and does not work. This happened after the car stumbled and the AFR fluctuated between 14.7 and 12 and the idle fluttered. The car would sputter when driven.

Then the car threw a p0102 code like the OP. I cleared the code, but now the Xede is NOT WORKING.

I uploaded the custom map that i always use, but the Xede stil will not work.

Is there anything that I can do to fix this or do I have to mail it to Vishnu?

PLEASE HELP