Glad you got it up and rolling!
When this happens it's caused by an intermittent loss of connection to the injector. As a safety feature the ECM turns off 4 injectors and only runs on 4 injectors to prevent damage. The injector solenoid going bad and making the ECM think that it lost connection is extremely rare. Chances are the plug is just loose. Replacing the pigtail with GMs updated harness will essentially bide you some time until it happens again. GM looked at it as a design issue with how short the wire is going to the plug. However the connector itself is what is actually loose and causing the intermittent connection. So no, replacing the pigtail won't fully cure the problem, but it may prolong it until the new connector loosens up.
The codes staying on is sign that the ECM sees something wrong with the circuit itself. Being as to how it won't go away and the truck still runs and doesn't go into tractor mode it's not shorting to ground anywhere due to the harness rubbing through, but the power wire feeding the injector may have a high level of resistance or the injector solenoid is failing.
Personally I feel the ice pick method provides the tightest crimp to the injectors and keeps them tighter than the new connector does. A connector that has been ice picked is significantly harder to push him onto the injector connection than a brand new connector is.
Hope this helps clarify your issues a little bit. If anything is unclear or you need more direction please post back here.
Happy trucking! 🤘
I know I am picking up an old thread. This finally happened to me yesterday. After over 15 years since the truck was manufactured. I was in a hurry so did this instead:
Basically pushing the female connector in and crimping it. I still have some questions about either method:
1. Does this mean that the injector is confirmed good and its just the connector ? Or is it that the FICM relearned to run it with 7 injectors instead.
2. My codes are staying on even after clearing them (P0207 and P2146). Truck runs fine and no longer have the tractor sound. Should replacing with new pigtail connector help remove the codes ?
3. Whats the difference between the two methods ? One shown on youtube vs one shown in this thread ?
4. Should I even bother to do anything after the icepick fix ? I mean its crimped on good and don't see point on changing the pigtail or the harness.
2005 LLY CCSB LT2 4X4
Driven by Austin
ECM Tuned by Kory @PPEI
TCM tuned by Dustin @DA
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2nd transfer case