2015TahoePPV
Member
- Joined
- Apr 22, 2023
- Posts
- 64
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- 56
Here's a good one for you. I'm in the home stretch on installing a reman (AFM Deleted) 5.3 in my '15 PPV. My son the gym rat bent the RH fuel rail removing it from the old engine, so we replaced it. We also replaced all 8 injectors with new OEM. Removing the fuel rails/ injectors from a 200K mile engine is one of the hardest jobs I've done, its really difficult.
The two injector harnesses are velcro strapped to the fuel rails. Remove them before doing any prying there, don't be stupid like I was. The post mortem suggests that the "Soy Based" (Rats love it) wiring insulation breaks down/ degrades in the engine valley environment. We must have pinched the harness under the pry bar when removing it, and the insulation turned to dust. Once the engine was running, we got random misfire codes, knock sensor codes, and the P216E Injector #6 voltage code.
I ohmed each injector and chased each circuit from the ECM connector to the harness and they basically checked out ok. The test procedure doesn't have you check between the circuits of the nearby injectors as it should, but if it did, you would find the problem. I removed the harness to inspect it and found the following:
The two injector harnesses are velcro strapped to the fuel rails. Remove them before doing any prying there, don't be stupid like I was. The post mortem suggests that the "Soy Based" (Rats love it) wiring insulation breaks down/ degrades in the engine valley environment. We must have pinched the harness under the pry bar when removing it, and the insulation turned to dust. Once the engine was running, we got random misfire codes, knock sensor codes, and the P216E Injector #6 voltage code.
I ohmed each injector and chased each circuit from the ECM connector to the harness and they basically checked out ok. The test procedure doesn't have you check between the circuits of the nearby injectors as it should, but if it did, you would find the problem. I removed the harness to inspect it and found the following:
