Safe mode P0171, P0300

[kckid816]

Is it +20 or -20 on the trim? Does the trim stabilize if you bring the idle up a bit using the pedal?

+20 and it goes to zero on throttle.

When it does the flashy CEL during limp mode, it goes to zero.

 

[Enki]

Pretty sure limp mode falls back to speed density. What does STFT do on light throttle?

 

[kckid816]

Pretty sure limp mode falls back to speed density. What does STFT do on light throttle?

Behaves normally. Fluctuates with low numbers or at 0.

 

[Enki]

So small air leak at idle then. Just large enough to cause issues at idle, but not relevant past there.

Check small hoses, clamps, bolt tightness on gasketed parts couplers for small holes, etc.