‘96 Corvette Negative Fuel Trims. Help!

[johnny_b]

Man I wish I had known it was more common to delete code 43 before I ordered new sensors. So this resistor you speak of is it inside the computer?

this specific pcm was borrowed from my other corvette in which it never threw the 43. So I hope it’s related to the wires.

[NomakeWan]

Man I wish I had known it was more common to delete code 43 before I ordered new sensors. So this resistor you speak of is it inside the computer?

this specific pcm was borrowed from my other corvette in which it never threw the 43. So I hope it’s related to the wires.

The resistor is integrated into the knock sensor. This is why the part number is unique compared to previous year Corvettes. 96-97 PCMs revert to the C3-style knock sensors that have no resistors in them because the OBDII PCMs detect the presence of knock sensors by actually checking their output and doing a sanity check rather than relying on silly resistance values like the 94-95 do.