Laptop connected to PNP1, cranked with low batt, now won't connect.
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Issue:
-Installed used MSPNP1, using TS Lite for now.
-Installed ECU according to instructions and loaded no AFM basemap, laptop connected just fine.(I could hear the fuel pump priming too)
-Went to start to set base timing, had low battery voltage from the car sitting so it only cranked for .5 sec then the relay just clicked.
-Charged battery, turned key to ignition and I don’t hear fuel pump priming and laptop won’t connect to ECU anymore. Car just cranks and wideband reads 10.0
What I have checked and what's also installed:(If it matters)
-All fuses under hood and in kick panel are good.
-ST SIGN fuse removed
-TPS is still connected
-AFM removed and GM IAT installed right before the throttle body
-AEM UEGO 30-4110 installed and I have the white wire running from the gauge to the factory O2 wire under the hood.
-Car started with no issue the stock ECU, haven't plugged it back in to see if it will fire
-Using FTDI USB to serial adapter
Thoughts on what may have happened while cranking on low battery voltage or what I can test next? What gets me is everything seemed to be working just fine right before I tried to start the car on a low battery.
![](https://www.miataturbo.net/images/smilies/smile.gif)
Issue:
-Installed used MSPNP1, using TS Lite for now.
-Installed ECU according to instructions and loaded no AFM basemap, laptop connected just fine.(I could hear the fuel pump priming too)
-Went to start to set base timing, had low battery voltage from the car sitting so it only cranked for .5 sec then the relay just clicked.
-Charged battery, turned key to ignition and I don’t hear fuel pump priming and laptop won’t connect to ECU anymore. Car just cranks and wideband reads 10.0
What I have checked and what's also installed:(If it matters)
-All fuses under hood and in kick panel are good.
-ST SIGN fuse removed
-TPS is still connected
-AFM removed and GM IAT installed right before the throttle body
-AEM UEGO 30-4110 installed and I have the white wire running from the gauge to the factory O2 wire under the hood.
-Car started with no issue the stock ECU, haven't plugged it back in to see if it will fire
-Using FTDI USB to serial adapter
Thoughts on what may have happened while cranking on low battery voltage or what I can test next? What gets me is everything seemed to be working just fine right before I tried to start the car on a low battery.
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Deathtrap13
MEGAsquirt
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10-21-2016 12:00 AM