Last week coming off the freeway and stopping at lights, I could smell burning insulation. Today I found the cause. On the two wires to one of the fuel injectors (front on right bank), the insulation is partly melted.

I ran the engine for a while, and they didn't get warm. Also checked when I got to work this morning.

So clearly the problem is intermittent. What could it be?

 

Mark:
Is it one or both wires?

 

Both wires, equally affected.

 

You might try and check the injector resistance and then compare to another 'known-good'.

A low resistance will draw more currant and melt the wires.
A big enough draw will fry the output circuit in the ECM!!!!!!!!!

A replacement injector might be required.

bob gauff

 

Thanks, I suspected as much. How easy are they to change?

 

SO that means the problem is not a short to ground inside the injector. As bob mentioned, testing the injector with an ohmmeter whiole wiggling it a little would be the next step.