What are good fuel trim readings?
With the engine idling, look at the Short Term Fuel Trim (STFT) and Long Term Fuel Trim (LTFT) values. Normal range may be high as plus or minus 8, but closer to zero is best. If the numbers are +10 or higher for STFT and LTFT, your engine is running LEAN.
What does fuel trim tell you?
Fuel trims are what engine control system use to compensate for all problems relating to air-fuel ratios (known as λ or lambda,) and combustion. The Electronic Control Module (ECM) or Powertrain Control Module (PCM) uses a few sensors to determine how much air is flowing into the engine.
When to take a long term fuel trim?
Note also that fuel trim values should only be taken when the engine had been running at the above speeds for at least 30 seconds. Ideally, long-term fuel trims should be at, or close to 0% when the engine is running at a steady speed.
What does caution mean on a Nissan Altima?
To avoid or reduce the risk, the procedures must be followed precisely. CAUTION This is used to indicate the presence of a hazard that could cause minor or moder- ate personal injury or damage to your ve- hicle. To avoid or reduce the risk, the pro- cedures must be followed carefully.
Is there such a thing as a 0% fuel trim?
While fuel trim values of 0% would be ideal, there is no such thing as a perfect engine, which means that in practice, achieving 0% fuel trim values consistently gets progressively more difficult as an engine ages.
Is there an owner’s manual for the Nissan Altima?
NISSAN reserves the right to change specifications, performance, design or compo- nentsupplierswithoutnoticeandwithoutobliga- tion. From time to time, NISSAN may update or revise this manual to provide Owners with the most accurate information currently available.
Which is the best trim level for Nissan Altima?
Select each trim below to compare key features and available packages. Which Altima is right for you? Select each trim below to compare key features and available packages. Sport. Inspired. Which Altima is right for you?
Note also that fuel trim values should only be taken when the engine had been running at the above speeds for at least 30 seconds. Ideally, long-term fuel trims should be at, or close to 0% when the engine is running at a steady speed.
How many horsepower does a Nissan Altima have?
Select each trim below to compare key features and available packages. VC-Turbo™ engine horsepower and torque ratings: 248 hp and 273 lb-ft of torque ratings when using 93-octane fuel; 236 hp and 267 lb-ft of torque ratings when using 87-octane octane fuel.
To avoid or reduce the risk, the procedures must be followed precisely. CAUTION This is used to indicate the presence of a hazard that could cause minor or moder- ate personal injury or damage to your ve- hicle. To avoid or reduce the risk, the pro- cedures must be followed carefully.