electrical issue

[jabrow87]

so i just installed a gm iat and map sensor, i also was moving around and cleaning up some other wiring. so now i hook up dsmlink and it shows -74 for coolant and intake temp, like 200 counts of knock and its not running, tps is 100% all the time.. anyways it turns over and kinda starts but i have 0 ecu grounds and i was wondering where the main ground point for the ecu is

 

[gofer]

Did the car start and log all the parameters just fine before you wired in the IAT and MAP sensor? What did you use/follow to wire in your IAT and MAP sensors? I ask because I've done a write-up on each just for logging in dsmlink, I'd start over and follow them as I'm sure you cut the wrong wires if everything else was fine before the install.
-Wiring & logging a GM IAT sensor
-Wiring & logging an AEM 3.5 bar MAP sensor

Your ECU's main ground is Pin 13 & 26 and Pin 92 is the ECU's sensor ground, look at this pinout if you have to. 2g ECU pinout

 

[jabrow87]

yeah blew the ground inside the ecu for pin 92, i soldered that and now its happy again

 

[gofer]

It would be sweet if you took a picture of the ECU with a blown sensor ground, if you did please post it. Glad to hear everythings working again!