Ignition System Repair

Ignition system repair at Apex Automotive in Gilbert, AZ, is handled with the precision and expertise that only decades of combined experience from David Sr. and David Jr. can deliver. The ignition system’s role is to generate and deliver the electrical spark necessary to ignite the air-fuel mixture inside the engine’s cylinders. This critical function directly impacts engine performance, fuel economy, and emissions. In the intense Arizona heat, ignition components such as coils, spark plugs, and wiring harnesses are subjected to accelerated wear and occasional heat-related failures. Common issues include coil pack failure, spark plug fouling, and damaged ignition wires, which manifest as misfire codes (P0300-P0308) or ignition circuit codes (P0350-P0358). David Jr. employs a diagnostic-first approach, beginning with a detailed vehicle history review and symptom discussion. We then perform a comprehensive OBD-II scan to identify active and pending codes, followed by live data stream analysis to observe cylinder-specific misfires and ignition timing behavior. Rather than replacing parts indiscriminately, we conduct component-level testing using specialized tools such as ignition coil testers, spark testers, and multimeters to isolate the exact faulty component. This avoids unnecessary parts replacement, saving you money and time. Once the faulty ignition coil, plug, or wiring is identified, we replace it with OEM-quality parts suited for your specific engine family, including GM’s V8 5.3L and 6.2L engines known for certain ignition coil vulnerabilities. After repair, we retest the system under load to confirm the absence of misfires and ensure smooth engine operation. Our thorough process helps your vehicle cope with Arizona’s desert conditions by maintaining reliable ignition, preventing rough idling, stalling, and power loss. By appointment only, David Jr. provides dedicated, personalized service that prioritizes diagnostic clarity, professional repair, and long-term engine health.