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Home/Cars/Genesis/G70/IG (2017-2023)/why does my Genesis G70 feel like it’s hesitating when driving

why does my Genesis G70 feel like it’s hesitating when driving

Genesis G70 IG (2017-2023)

Severity: mediumDifficulty: medium2-4 hours
3 min read
503 words

Problem Statement

Learn how to diagnose and fix engine hesitation in Genesis G70. Step-by-step guide with diagnostic procedures and repair instructions.

Component
Engine
Repair Time
2-4 hours

Safety Warnings

  • ⚠Disconnect the battery before working on electrical systems.
  • ⚠Allow the engine to cool before performing any maintenance to avoid burns.

Symptoms

  • •Engine hesitation or stuttering during acceleration
  • •Check engine light illuminated
  • •Poor fuel economy
  • •Rough idle when stationary
  • •Increased exhaust emissions

Diagnostic Steps

  1. 1Scan for error codes using an OBD-II scanner to identify any fault codes.
  2. 2Check fuel pressure using a fuel pressure gauge to ensure proper delivery to the engine.
  3. 3Inspect the air filter for clogs or restrictions that could affect air intake.
  4. 4Examine the throttle body for carbon build-up or malfunction.
  5. 5Test ignition components, including spark plugs and coils, for wear or failure.
  6. 6Inspect vacuum lines for leaks that could cause air/fuel mixture issues.

Solution

Solution

1. Preparation

  • Gather all necessary tools and parts.
  • Ensure the vehicle is on a level surface and the engine is off before starting.
  • Disconnect the battery to prevent electrical shorts.

2. Replace Air Filter

  • Locate the air filter housing, usually near the engine intake.
  • Unclip or unscrew the housing cover.
  • Remove the old air filter and inspect the housing for debris.
  • Install the new air filter, ensuring it fits snugly.
  • Reassemble the housing cover securely.

3. Clean Throttle Body

  • Remove the throttle body from the intake manifold (ensure the engine is cool).
  • Use a throttle body cleaner and a soft cloth to clean the interior of the throttle body.
  • Pay special attention to the throttle plate and the bore.
  • Reinstall the throttle body and torque to manufacturer specifications.

4. Replace Spark Plugs

  • Remove the ignition coil cover if applicable.
  • Disconnect the ignition coils and remove them from the spark plug wells.
  • Use a spark plug socket to remove the old spark plugs.
  • Install new spark plugs, ensuring they are gapped correctly per manufacturer specs.
  • Reinstall the ignition coils and reconnect them.

5. Fix Vacuum Leaks

  • Visually inspect all vacuum hoses for cracks or disconnections.
  • Replace any damaged hoses as needed.
  • Use a smoke machine or carburetor cleaner to detect leaks during engine operation.

Verification

After completing the repair, verify that the issue has been resolved:

  • Test the affected component to ensure it functions correctly
  • Check for any error codes or warning lights
  • Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • OBD-II scanner
  • Fuel pressure gauge
  • Socket set
  • Throttle body cleaner
  • Torque wrench

Parts Required

  • Air filter
  • Spark plugs
  • Ignition coils (if necessary)
  • Vacuum hoses (if damaged)

Additional Information

Component

Engine

Repair Time

2-4 hours

Difficulty

medium

Severity

medium

Tools

5 items

Parts

4 items

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