Tech A says that the difference between stored pulse width and the actual pulse width required to keep the mixture at the correct ratio is called fuel trim. Tech B says that the long-term trim values can be positive or negative. Who is correct?

A. Tech A

B. Tech B

C. Both A and B

D. Neither A nor B

When the displayed fuel trim value is said to be negative number, it implies that the ECU is reducing the injector pulse scope to remove fuel from the air or fuel mixture.

Therefore, Tech B says that the long-term trim values can be positive or negative is correct while tech A is wrong.

So, option B is correct.

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Tech A says that the difference between stored pulse width and the actual pulse width required to keep the mixture at the correct ratio is called fuel trim. Tech B says that the long-term trim values can be positive or negative. Who is correct? A. Tech A B. Tech B C. Both A and B D. Neither A nor B

Respuesta :

Why is long term fuel trim negative?

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