Rough idle- injector control circuit

[Rnolan]

I drove my truck all weekend and parked it Sunday night. On tuesday morning I started it up and the low fuel light came on. I JUST FILLED IT UP SUNDAY. It started to idle really rough, wouldn't rev above about 1800RPMs and has no power. Sometimes it will start and run fine for about a minute, then go back to doing the same thing.
Here are the codes that came up. Anyone know where I can start?

 

[Rnolan]

The codes are:
P0201 INJECTOR 1 CONTROL CIRCUIT
P0204 INJECTOR 4 CONTROL CIRCUIT
P0206 INJECTOR 6 CONTROL CIRCUIT
P0207 INJECTOR 7 CONTROL CIRCUIT
P1261 INJECTOR POSITIVE VOLTAGE CONTROL CIRCUIT GROUP

 

[steakman]

did you get this figured out..??

Well seeing as I am having similar issues. This is an electrical issue. I know it happens frequently to LLY and LB7 engines. Guys have told me that to check the injector harness where it goes to the FICM. It is apparently tie wrapped at some point to the alternator bracket at a sharp edge. Yolu may have some seriously chafed wires there..??

I'm still trying to figure my issue out but its on an LBZ and supposedly these issues do nto happen to them..yea right.! I threw P2149/P0207 ... Injector # 7 did the Ice pick manouvre..still no joy. I have connectivity but it isnt 100%.

Good luck and I'll watch this thread as well as start a new post on my issues and questions.

cheers,

Theo

 

[jlawles2]

On the 02, check for harness rub. The wiring harness rubs on the aluminum bracket for the alternator and wears the insulation off the wires, then they go to ground and it causes issues. Common on most of the trucks.

If you do have harness rub, fix the missing insulation, broke wires. Then use a piece of rubber heater hose to protect the wires from rubbing through again.

 

[Vernon Stoltzfus]

What did you guys find on this issue? have the same thing on a lmm

 

[MaxSmoke]

Did you figure out what the issue was? Just did injectors on my buddy's 03 sat and having the exact same problem after we fired it up. Thanks!