Hesitation to accelerate under load

An engine that is hesitating to accelerate is most likely dealing with a fuel/air mixture that is too lean. Engine’s that are running inefficiently will begin to show signs like hesitation which will only become worse over time.

What causes a car to hesitate when you step on the gas?

An engine that hesitates when accelerating is either sucking too much air, not getting enough fuel, or misfiring. Here’s what you might discover—and what you can do to fix the problem: Dirty air filter. The Fix: Replace the air filter.

What can cause engine hesitation?

Common Causes Of Engine Hesitation Include:

  • Dirty Air Filter.
  • Stuck Or Failed Mass Airflow Sensor (MAF)
  • Clogged Or Leaking (EGR) Valve.
  • A Failing Ignition Coil.
  • A Failing Throttle Position Sensor (TPS)
  • Clogged Fuel Injectors.
  • Dirty Or Clogged Fuel Filter.
  • A Failing Oxygen Sensor (O2)

Why is my car lagging while driving?

An acceleration problem is usually the result of insufficient fuel, air, or spark during the combustion process. Worn-out spark plugs or the electrical cables attached to them are one of the most common causes of cars stuttering.