MSefi.com read only forum (Jan.15,2018)

Matt,

I had previously reloaded the firmware prior to posting the MSQ this morning. Just to be sure I again reloaded the firmware without loading the MSQ and have the same indications.

At this point, you may need to contact whoever sold you the daughter card to see if it's under warranty. (If that's us, email us at websales@DIYAutoTune.com).

Matt, Yes I did purchase the daughter from DIYAutoTune and send an e-mail to websales on June 7,2012 concerning this issue. I have yet to get a responce. I will try again.

I'm sorry the first email slipped through the cracks. I have answered the second one.

This may not be relevant here, but I have seen almost this exact set of described problems a few times before. The first time it stumped the heck out of me. On installs that have been in service for many, many miles, the DB 37 plug pins can get fatigued. The culprit usally seems to be the fuel pump output pin 37. Look closely, and see if it has been pushed into the plug some on the ECU. It can sometimes make good enough contact on the stim, but not neccisarly when loaded in the car.

If so the fix is either to replace the plug (I did so a couple times on my own unit before getting tired of doign so), or even better, to fix the core issue. Get the pin pulled out correctly. Then access the backside of the plug. The better ones have a plastic cover, remove it. Now you should be able to see the pin wiring going to the PCB. The problem is they can move around in there and eventually slide out of position. Mix up some epoxy. 5-minute should work if you do it quickly. Set the ecu up on end. Fill the inside of the DB37 channels. Work the exoxy into it with a small flatblade or simular. Make sure to get it filled up completely. Let it sit in position like that overnight (even if using 5 min expoxy, you want it HARD). If done right, it looks cool too! I actually start off now doing this on any unit I know will see extreme use and vibration. Solves some really hard to trace down issues!

I have also seen this happen when somebody just had a loose plug... Myself? I have run for years without screwing down my plug, and never had a problem with it coming loose. But this could have contributed to the plug fatigue. Or more likely the ECU getting plugged in and out so many times! I used my car as a testbed for the units I built.

Again, I could well be out in left field. But it is worth a look...

Also while everyone usally checks over grounds really well, take a really good look at the power distribution side of things. I have spent more time than I would care to admit to tracign down random issues like this to find a bad power cable on the battery.

I remeber once staring at battery voltages in MegaTune and seeing nothing amiss there. The refresh rate is not always fast enough to catch it. But the ECU still looses enough juice to drop below its minimal input voltage.

Anyways when you have stared at it for too long you can find all sorts of issues that arn't even issues. And hours later discover ya left the positve cable loose! Never happened to me, nope...

T3Bunny,

Thanks for the reply. I will look over the DB37 connection very closely. This problem is really kicking my butt. I returned the replacement DB card the the vendor for testing. They said there is no problem with the replacement card. When I plug my DB card into MS all indications appear normal except injector output pulses. Plug in the replacement DB card and and I get new problems as I discribed earlier.