TunerproRT quits reading data during scans

jasonsmith · Post by **jasonsmith** » Sat Dec 11, 2010 4:52 pm

What would cause the Tunerpro RT to quit reading data during a scan? Sometimes I can go on a 20 minute drive and scan. Other times it will quit reading data every 2 minutes. Which means I have to shut the car off and start over. The other day when I was trying to scan, it quit reading data 5 times.

The laptop sits still while I'm driving. So, I wouldn't think of it being a connection coming loose. But maybe I could try on my next scan to wiggle the connections on my cable to see if maybe that is the problem. I have a Moates cable.

Post by **robertisaar** » Sat Dec 11, 2010 8:28 pm

what ECM and/or mask? i know the 1227165 is notorious for doing stuff like this. whether it's a GM code bug or a hardware issue, no one knows for sure.

jasonsmith · Post by **jasonsmith** » Sat Dec 11, 2010 8:40 pm

robertisaar wrote:what ECM and/or mask? i know the 1227165 is notorious for doing stuff like this. whether it's a GM code bug or a hardware issue, no one knows for sure.

It's an 89 Corvette. I looked around and came up with the number you posted: 1227165.

So, I'm assuming it has something to do with this particular ECM? And not the cable/laptop/software?

It does make it hard to do a scan if you have to sometimes stop every 2 miles and restart the car and restart the scan. I wonder if I'd have the same problem if I used an AutoXray?

Though, after I get connected. I turn the 10k resistor off. I don't know if that would have anything to do with it?

Post by **robertisaar** » Sun Dec 12, 2010 6:28 am

i can't say as i've never dealt with one myself, but try leaving the 10K resistor connected, see if it changes anything.

jasonsmith · Post by **jasonsmith** » Sun Dec 12, 2010 9:40 am

robertisaar wrote:i can't say as i've never dealt with one myself, but try leaving the 10K resistor connected, see if it changes anything.

Ok, thanks. I'll try it and see what it does. I have read leaving the 10k resistor on will scew some of the data. I've read it makes it idle higher.

Post by **robertisaar** » Sun Dec 12, 2010 9:41 am

yes, there likely is a value in the algorithm or calibration that would do that, though you could change it to more closely resemble your normal idle speed.

i know on some of the C3 ECMs, it also adds spark advance, but again, there's a value that can be changed to stop if from happening.

DSmith1989 · Post by **DSmith1989** » Tue Dec 14, 2010 5:08 am

I run the '165 ECM in my car and this is something that most likely you will have to just deal with. I don't seem to have as much trouble with it cutting out with v5 as I did with v4 but it is the ECM, not the cable or TunerPro.
I have swapped ECM's, left the 10k on, changed ALDL harnesses and anything else I could think of and the bottom line is the '165 ECM will stop sending the data stream signal at any time for no apparent reason.

Good Luck,
Dewayne

jasonsmith · Post by **jasonsmith** » Tue Dec 14, 2010 8:19 am

DSmith1989 wrote:I run the '165 ECM in my car and this is something that most likely you will have to just deal with. I don't seem to have as much trouble with it cutting out with v5 as I did with v4 but it is the ECM, not the cable or TunerPro.
I have swapped ECM's, left the 10k on, changed ALDL harnesses and anything else I could think of and the bottom line is the '165 ECM will stop sending the data stream signal at any time for no apparent reason.

Good Luck,
Dewayne

I've got V4. Looks like I need to replace it with V5 and see how that goes.

Do you have to restart your car everytime it quits reading data? I shut down and restart the TunerProRT. But can't get it to reconnect with the car already running. It has to be with the key "on".

DSmith1989 · Post by **DSmith1989** » Tue Dec 14, 2010 8:35 am

You will need to turn the key off, wait 30 seconds or so then start over. It's a real pain in the backside but it is what it is.

jasonsmith · Post by **jasonsmith** » Thu Sep 01, 2011 11:05 pm

Is it possible it could be a bad cable? I've got a Moates cable.

I went ahead and cleaned the ECM and plug contacts with contact cleaner. And also sprayed the ALDL. And I cleaned all the engine grounds. I had it idling and it quit flowing data after around 10 minutes.

I had also read of this problem with Datamaster. And they said for Datamaster that you can adjust the speed of the connection so some laptops can communicate at a rate that the ECM can keep up with.

I was looking into doing some scans and sending them off so I could burn chips and tune my car. Which requires 20+ datalogs under certain driving conditions. And I'm betting I'm going to have a problem getting those datalogs.

cmaje72 · Post by **cmaje72** » Fri Sep 16, 2011 10:08 am

check that your laptop does not have any kind of motion sensing protection built in. For example I have an IBM thinkpad that I use for logging. It has a feature called "Active Protection". There must be some kind of motion sensor in it and whenever it senses that there is too much movement it parks the hard drive and stops TP from writing to the log file.

Just another thing to check.

jasonsmith · Post by **jasonsmith** » Fri Sep 16, 2011 10:21 am

cmaje72 wrote:check that your laptop does not have any kind of motion sensing protection built in. For example I have an IBM thinkpad that I use for logging. It has a feature called "Active Protection". There must be some kind of motion sensor in it and whenever it senses that there is too much movement it parks the hard drive and stops TP from writing to the log file.

Just another thing to check.

I don't believe it has that. Could it be the cable? Its a Moates cable.

EagleMark · Post by **EagleMark** » Sat Sep 17, 2011 4:04 am

DSmith1989 wrote:I run the '165 ECM in my car and this is something that most likely you will have to just deal with. I don't seem to have as much trouble with it cutting out with v5 as I did with v4 but it is the ECM, not the cable or TunerPro.
I have swapped ECM's, left the 10k on, changed ALDL harnesses and anything else I could think of and the bottom line is the '165 ECM will stop sending the data stream signal at any time for no apparent reason.

Good Luck,
Dewayne

I think he told you it's not the cable...

jasonsmith · Post by **jasonsmith** » Sat Sep 17, 2011 8:00 am

EagleMark wrote:
DSmith1989 wrote:I run the '165 ECM in my car and this is something that most likely you will have to just deal with. I don't seem to have as much trouble with it cutting out with v5 as I did with v4 but it is the ECM, not the cable or TunerPro.
I have swapped ECM's, left the 10k on, changed ALDL harnesses and anything else I could think of and the bottom line is the '165 ECM will stop sending the data stream signal at any time for no apparent reason.

Good Luck,
Dewayne
I think he told you it's not the cable...

There's other guys who had similar problems and it was the cable. Which is why I thought it might be the cable.

But I have read on here about the 165 ECM. But there are alot of guys with that computer who don't have any problems at all.

EagleMark · Post by **EagleMark** » Sat Sep 17, 2011 9:53 am

I hate when that happens!

I am having a simalar issue with a LT1 ADX. Not stopping, just glitching from correct looking data to? and back... some guys say it works fine, others say not at all, I am in the middle?

Since I run everything through a USB AutoProm, set switches as pass through is the only differance. Works on all other ECMs. But I ordered a cable to try as well...

Good luck!

Cooter · Post by **Cooter** » Tue Dec 20, 2011 7:28 am

I've seen some similar cases of other serial communication software and Win (Vista, 7). The only way we fixed it was to purchase a PCMCIA Serial card.. It allows a more direct connection to the BUS rather than going thru software for serial communication.