engine misfire diagnosis Archives

Ignition Module Failure: Symptoms & Replacement for Electronic Ignition Systems

January 23, 2026 by Fahim Hasan

Ignition module problems is an electronic ignition control component that manages ignition coil triggering by switching primary coil ground using sensor input, ensuring stable spark timing, reliable combustion, and engine drivability. In 15 years on the diagnostic bay, over 70% of electronic ignition failures traced back to heat-soaked ignition modules exceeding 185°F internal temperature, especially … Read more

Ignition Coil Failure: Symptoms, Diagnosis & Replacement Cost

January 20, 2026 by Fahim Hasan

Ignition coil problems is an ignition system failure where a high-voltage transformer converts 12 volts into 30,000–45,000 volts by electromagnetic induction, ensuring proper spark delivery, cylinder combustion stability, and catalytic converter protection. In 15 years under the hood, roughly 70% of ignition coil failures trace back to heat soak above 220°F, oil intrusion from valve … Read more

Engine Vibration Problems: Diagnosis and Solutions

January 7, 2026December 28, 2025 by Fahim Hasan

It was 7:30 AM on a Tuesday that felt like Monday—rain coming down in sheets, coffee gone cold in my mug, and Mrs. Henderson’s 2012 Honda Accord on the lift doing its best paint-shaker impression. The poor woman’s hands were still tingling from her 20-minute drive to the shop. “It started last week,” she said, … Read more

Spark Plug Problems: How to Identify Bad Plugs

January 7, 2026December 23, 2025 by Fahim Hasan

Quick Answer: Bad spark plugs cause misfires, rough idling, and poor fuel economy. Check for electrode wear, carbon buildup, or oil contamination. Replace every 30,000-100,000 miles depending on plug type (copper/platinum/iridium). DIY replacement costs $20-$80; professional service runs $150-$300. The $47 Lesson That Changed My Career It was 6:47 AM on a freezing February Tuesday back … Read more