Hi rapid,

I have faithfully used Power Service since day one, in every tank. Auxiliary fuel filtration almost from day one, with regular filter changes.

Right now I'm sort of looking for some old posts I vaguely recall about bad fuel caps and power codes. But in any case, today I was reduced to digging out my old -- but essentially new -- stock cap and replacing my locking cap.

Of course I will not be able to test any theory until I tow again on a long trip in warm weather.

I must look pathetic to John Kennedy (grin) But investing the combined cost of his lift pump and tune on a 123,000 mile truck gives me pause, particularly when scattered posts in the Sticky indicate that not every older truck with 0087 gets fixed by going that route (and scarily, or even with new injectors.)