Originally Posted by Tyr4nt
Hey brother - There's a lot going on that I don't understand from reading.
1) What codes are you getting?
2) Did you trouble shoot them?
3) What fix did you implement?
4) What cables did you remove and touch for 30 seconds? Battery?? I don't understand this at all.
5) When you say "ECM Flash" I assumed you meant the process of installing new software in your ECM -- Can you provide a link to the XJ forum process you followed? Is this just to get the dash to flash out the DTC to you?
6) You said, "Could a loose connection somehow drain my battery?" -- No, not drain your battery, but lose/bad connections certainly can prevent the starter from engaging. Understanding your process from my question 4 & 5 might help us answer too.
7) "I'm afraid I might have shorted my ECM, any ideas guys?" I'm not sure what exactly you did. Help us help you by answering the previous questions.
Okay where shall we start..
1- P0203 is the only one I have stored on my reader, MIL was flashing the other times and I did not record it. Some kind of Misfire I figured..
2- I'm not sure.
3- I took the injectors off after I recieved the P0203 code and checked for debris, then took the electrical contact cleaner and cleaned the harness and connections on the injectors. It seemed to run better however I still had the code.
4- First I tried removing the +/- cables from the battery and touched them together for 30 seconds, put them back on and it had no MIL for a couple minutes, but then it started stumbling again; So even though I had not really looked into it I tried something I read on my XJ forum, It said that you can reset the ECM by removing the + cable and ground it to the frame for 30 sec, which removes memory. Then you put it back on and turn the key to acc, then turn lights on, then off. Once that's complete you it should restore it to factory settings and will start recording new data. Forced Flash'
5-Yes, well rather someone posted a link to another forum- ecu reset
6- Yeah I went and had a charge thrown onto the battery. It tested good.
7- Hope this helps. ^
I picked up the battery (after testing and charge) to the Jeep and reinstalled, and the dash lit up. I proceeded to turn it over and it clicked again and now nothing. No dash lights or anything. I then pulled the battery off my XJ and threw it on, It lit up and then when i turned the key.. nothing. Dash will no longer light up with either battery. I guess I will go out again to reevaluate the situation.
Also yeah the original post is a mess.. it was my attempt to cut through the bs since most people don't bother to read a novel on these forums. Thanks for looking into it!