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Loss of Boost/Power in my 2023 Acura Integra A-Spec

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Mike T. · rep 0 · May 25, 3:40 AM · 1 replies · solved · Question

Vehicle: 2023 Acura Integra A-Spec CVT

Hey community,

I've got a 2023 Acura Integra A-Spec with the 1.5L turbo engine, and I've started experiencing an intermittent loss of power, almost like the turbo isn't kicking in sometimes. It feels sluggish, especially when accelerating from a stop or trying to pass on the highway.

It's not constant, and sometimes it drives perfectly fine. I've only got about 15,000 miles on it, and I'm pretty diligent with maintenance. No check engine light has come on yet, which is puzzling.

Could this be a turbo issue, or something else entirely? Has anyone with a new Integra or a similar Honda 1.5T engine encountered this? What should I be looking for or asking the dealership to check?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 3:40 AM

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ClearTheCode admin answer:

Intermittent loss of boost or power in your 2023 Acura Integra 1.5L turbo engine, especially without a Check Engine Light, can be frustrating but is often traceable to a few key areas. Here’s what to consider:

Potential Causes:

  1. Wastegate Actuator/Solenoid: The wastegate controls exhaust gas flow to the turbo. If its actuator or control solenoid is sticking or failing, it can prevent the turbo from building proper boost.
  2. Boost Leak: Leaks in the intercooler piping, charge pipes, or vacuum lines can cause a loss of pressure, leading to reduced boost. These can be difficult to spot visually.
  3. Turbocharger Issues: While less common at 15,000 miles, internal turbocharger issues like a failing bearing or damaged turbine/compressor wheels could be a factor.
  4. MAP/Boost Sensor: A faulty Manifold Absolute Pressure (MAP) sensor or boost pressure sensor can send incorrect readings to the ECU, leading to improper boost control.
  5. ECU Software Glitch: Sometimes, a minor software anomaly can cause temporary boost limitations.

Diagnostics & What to Do:

  1. Listen for Sounds: Pay attention to any unusual hissing, whistling, or fluttering noises during acceleration, which could indicate a boost leak.
  2. Check for Loose Connections: Visually inspect all turbocharger-related hoses, clamps, and electrical connectors for tightness and damage.
  3. Professional Diagnostic Scan: Even without a CEL, a dealership-level scanner can read 'pending' codes or show live data for boost pressure, wastegate duty cycle, and sensor readings. Codes like P0299 (Turbo/Super Charger Underboost) or P0234 (Turbo/Super Charger Overboost) might be present in history.

When to See a Shop:

  • Immediately if the problem becomes consistent, a CEL illuminates, or if you hear grinding noises from the turbo.
  • Given the vehicle's low mileage and warranty coverage, your Acura dealership is the best place to start. They have specialized tools and training for these specific turbo engines. Explain the intermittent nature clearly. They can perform a thorough inspection, pressure test the boost system, and check for any relevant software updates or TSBs.
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