Car Fixed
GarageProLogin
2020
chevrolet silverado17 views

Rough Idle or Engine Misfire

Expert diagnosis and repair solutions for 2020 Chevrolet Silverado Rough Idle or Engine Misfire. Get step-by-step fixes, cost estimates, and professional advice.

Expert Repair Solutions

1
medium$500-$800
Replace all fuel injectors to resolve rough idle and misfire issues, especially if P050D code is present.
Source: https://www.youtube.com/watch?v=m7Y9uVa-89E

Repair Steps:

  1. Disconnect the battery to ensure safety.
  2. Remove the intake manifold to access the fuel injectors.
  3. Carefully disconnect the fuel rail and remove the old injectors.
  4. Install new fuel injectors and reassemble the components in reverse order.
2
easy$150-$300
Inspect and replace faulty spark plugs and ignition coils to address misfire codes such as P0300.
Source: https://apdty.com/blogs/news/4-8l-5-3l-6-0l-gm-truck-rough-idle-trouble-codes-po300-po171-po174-and-po332

Repair Steps:

  1. Locate the ignition coils and spark plugs on the engine.
  2. Remove the ignition coil and disconnect the spark plug.
  3. Install new spark plugs and reattach the ignition coil.
  4. Ensure all connections are secure before testing the engine.
3
medium$100-$250
Check for vacuum leaks which can cause rough idle and repair any found leaks.
Source: https://repairpal.com/chevrolet/silverado-1500/2020/rough-idle

Repair Steps:

  1. Use a smoke machine to identify any vacuum leaks in the engine bay.
  2. Inspect hoses and connections for cracks or disconnections.
  3. Replace or repair any damaged hoses or components.
  4. Re-test the system to ensure the leak has been resolved.
4
easy$50-$100
Clean the throttle body and upper cylinders to improve idle quality.
Source: https://www.reddit.com/r/Chevy/comments/mp3uh1/brand_new_silverado_1500_rough_idle_service/

Repair Steps:

  1. Remove the air intake duct to access the throttle body.
  2. Use a throttle body cleaner to remove carbon deposits.
  3. Clean the upper cylinders with a suitable cleaning agent like Seafoam.
  4. Reassemble the components and test the engine.

Get a Personalized Diagnosis

Get AI-powered repair suggestions specific to your vehicle's symptoms and history.

Start Free Diagnosis →
Browse more common problems