Noize:

I would love to have Shiv custom tune my car. Unfortunately, I live in New Orleans. Unless Vishnu comes to New Orleans or some place really close, it’s unlikely I’ll be able to attend. Although, there is probably not much of a chance for this. There are very few EVOs down here. I’ve seen one or two others besides mine. To my knowledge, there is no AWD dyno in the near vicinity either. I’m also a business owner and have very little free time.

Dyno4mance:

If you read my earlier post, this rarely happens to me (orange flashing light). Most of the time (99%) there is no light whatsoever. The car starts, but the XEDE refuses to power-up, nothing. As I stated earlier, I can work around this by cycling the key a few times and watching for the light to come on. To be honest, this happens more times than not.

It’s obviously a problem with the XEDE or the wiring harness. The car runs great otherwise.

Thanks for the replies.

 

Has anyone else beside ogvw try a different ground location or improving the connection to see if that could be the culprit? The symptoms seem like a bad connection somewhere. It may be possible if the ground connection is a bad one it may be internally tripping the Xede, which then shows it's symptoms with decreased boost. I've haven't experienced this issue yet, but did place the ground wire at a different location than specific in the directions that seems to be better and closer to the crossbar, which may provide a better ground connection. Easy enough for some to try and see if it makes any difference.

 

I created a four point grounding harness and grounded the Xede in (obviously) four distinct locations. The Xede still did this to me once since then and it was flashing orange/red. Also all of my contacts are soldered.

James

 

nOOdle:

I have tried 4 different grounding locations with no change in the condition. I don’t think the ground is the problem for me. As Shiv said, the ground is only for the boost control. My problem is that the XEDE is not initializing – no power whatsoever, no lights, nada, totally blank. I just got home from the office a few minutes ago. When I left the office, I got into the EVO, started the car, every was fine – green light and everything, boost was fine – 20 psi. As soon as I got home, I parked the car and shut it down, leaving it to sit for about a minute. I then tried to start the car – no light from the XEDE at all – no blinking orange light, no green light, nothing. I went for a drive around the block – no boost over 10 psi. I then parked the car and shut it down. I tried cycling the key from “acc” to “on” 3 more times – nothing from the XEDE – no lights, totally blank. I then tried my “trick” of leaving it in the “acc” position for 20-30 seconds, then to the “on” position. Progress! I got the flashing orange light. I then started the car and the light turned green. Everything was great. I went for a drive and boost was steady at 20 psi.

It’s my suspicion that when this happens, the car is running on the stock computer with the boost limited to 10 psi – stock computer with the boost wire disconnected. I hope Shiv reads this and gives some feedback. It sounds like a bad wiring harness to me. But I’m only guessing??? The thing that’s weird is that it works if I leave the key in the “acc” position for 20-30 seconds. Any idea?

Thanks

 

Weird... According to Chiptorque the Xede loads the burned map from RAM in under < 1sec. and from my understanding this provision is built into the firmware. Other than a glitch in the firmware, not having the latest firmware revision, faulty ground or Xede harness I have no other ideas. Could it be a bad connection at the harness to ECU harness? Maybe try unplugging, spraying some electric contact cleaner, and reseat the plug making sure all pins are making good contact...

 

nOOdle:

Thanks for the reply. I tried disconnecting and reconnecting all the plugs several different times, making sure they were all seated. I don't think the XEDE loading the map is the problem. As long as I have the flashing orange light, there is no problem. The problem is getting the flashing orange light. For whatever reason, the XEDE periodically does not power on. I'm still thinking a faulty harness??? I'm anxious to see what Shiv thinks about the problem. I'm wondering if Vishnu would provide me with another harness to test?

Thanks again for everyone's assistance.

 

do you have the latest firmware? Come to think of it, I haven't had this problem sence the firmware update. <knock on wood>

 

Sorry guys.

I messed up my terminology. I have to leave it in the "acc" position first for 20-30 seconds, then the "on" position for a few seconds, then start the car. I'll go back and edit my previous posts, so no one gets confused.

I THINK I have the latest firmware. I just received and installed my XEDE from Vishnu 2 weeks ago (ordered it a little over 3 weeks agao). I won't be able to confirm this until Wednesday (today being Monday).

 

Shiv's just getting back from a Colorado tuning trip, so that's why he hasn't seen this yet. Don't worry, though, as you'll be covered under warranty, I'm sure.

 

Noize:

Thanks. I believe that Shiv is an honest businessman. I never doubted Vishnu's customer service. It just seems to be a really weird problem. It works fine as long as I leave it in the "acc" position for 20-30 seconds. Weird! Otherwise, I really love the XEDE. It has absolutely transformed the car! The WOT, high RPM power is great. But, I'm even more impressed by the part throttle, low RPM drivability and increased throttle response. I can't wait to learn more about tuning and tweaking.

Thanks.

 

nope can't be the firmware as I was upgraded when you were and I got this fault just the other day.

 

add me to the list, happened to me this morning on the way to work for the 1st time. I hope someone can figure this out. I cut the car off while driving coasted for a sec then started it back up and all was well, but at $900.00 bucks I would hope this can be fixed. Only had it for about 3 weeks. Shiv, has been awesome and I know he will come through for us.

 

Well Guys:

Sorry to say but I've got to ad myself to the list too. The EVO was running terrific except for the idle and running fat on the low end (stuff the firmware upgrade would address).

Just had the firmware upgrade on Saturday in Colorado.

Diane's EVO was running like a terror until yesterday.

She was pulling off of an on ramp when the car complete cut out on her. She's got a good head so she quickly moved over into the breakdown lane just before some ditz, who wasn't paying attention, almost rearended her.

I drove the beast to work today and it immediately started to cutout completely under moderate to heavy acceleration.

No boost over .8 bar.

I also have an intermittent miss at 3700 to 3900rpms.

HELP!!!!!

Shiv, don't get me wroing, I love what you've help me do with this car. It is fantastic.

This has got to be a stupid gremlin in the works.

Your thoughts,

Best Regards,
JS

 

Hi guys,

If there is any problem with your XEDE (with it not turning on), please send it to me and we will replace the intire unit. I'm still trying to figure out whether these isolated problem cases are due to faulty XEDEs or faulty XEDE harnesses. Either way, both will be replaced. Also, the boys from Chiptorque will be coming to visit in a few weeks and we plan in getting to the bottom of this as well as finalize XMAP v3 (among other things).

John-- This problem only started after updating the firmware?

Shiv

 

Just an update.. i finally saw this no power-on issue this morning as i was testing the newest batch of XEDEs. It resiliantly restisted turning on (no LED). What I did was unplug the grey connector and then plug it back in. Then it worked like normal over and over again. To me, this suggests a possible faulty connection in one of the harness connectors. I'm looking into this right now and have already relayed the issues to the hardware guys. I don't think this is a firmware issue since a few with both the old and new firmware have reported this problem. Could you guys try this and see what the results are.

John-- just emailed you.

Shiv