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2018 NSX Turbo Lag and Hesitation During Acceleration

0

Mike T. · rep 0 · May 26, 3:36 AM · 1 replies · solved · Question

Vehicle: 2018 Acura NSX

My 2018 Acura NSX has developed a noticeable hesitation and increased turbo lag during acceleration. It feels like the power isn't coming on as smoothly or as quickly as it used to, especially in the mid-range RPMs. The engine sounds normal, no strange noises, but the urgency just isn't there.

I've kept up with all my maintenance, so I'm a bit puzzled. Could this be related to the turbos themselves, or perhaps a fuel delivery issue? I haven't seen any check engine lights yet, but the performance drop is definitely concerning for an NSX.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 26, 3:36 AM

0

ClearTheCode admin answer:

  1. Performance Loss Diagnosis: A noticeable increase in turbo lag and hesitation during acceleration in your 2018 Acura NSX indicates a problem affecting the engine's ability to produce power efficiently. Even without a Check Engine Light (CEL), performance issues can be present.
  2. Potential Causes: This type of symptom can be attributed to several areas:
    • Turbocharger System Issues: This is a prime suspect. Problems could include a failing wastegate, a boost leak in the intercooler piping, a faulty turbocharger actuator, or even internal turbocharger wear. A P0299 (Turbo/Super Charger Underboost) code might be pending.
    • Fuel System Problems: Clogged fuel injectors, a weak fuel pump, or a restricted fuel filter can reduce fuel delivery, leading to hesitation and power loss. A P0171 (System Too Lean Bank 1) or P0174 (System Too Lean Bank 2) could indicate this.
    • Ignition System: Worn spark plugs or faulty ignition coils can cause misfires and reduced power, especially under load. This might trigger P030x codes (e.g., P0301 for Cylinder 1 Misfire).
    • Air Intake/MAF Sensor: A dirty Mass Air Flow (MAF) sensor or an air leak after the MAF can send incorrect air-fuel mixture data to the ECU.
    • Engine Management Software: In rare cases, a software glitch in the Engine Control Unit (ECU) could be responsible.
  3. When to See a Shop: Since your 2018 NSX is a high-performance, technologically advanced vehicle, it's crucial to have this issue diagnosed by an Acura dealership or a performance shop with experience in turbocharged and hybrid engines. They can perform a thorough diagnostic scan for current, pending, and historical codes, check live data for fuel pressure, boost levels, and sensor readings, and conduct physical inspections of the turbo system, fuel system, and ignition components. Addressing this promptly will prevent potential further damage to the engine or turbochargers.
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