Standard Ignition LX-339 Ignition Control Module

Ignition Control Module for Distributor Applications

Standard Ignition LX-339 is an ignition control module built for inside-distributor mounting on 12-volt systems. It is engineered for vehicles that need reliable spark control, stable coil triggering, and consistent performance in demanding underhood conditions.

Compatible With 1985-1993 Chevrolet, GMC, Pontiac, Buick, Cadillac, and Oldsmobile applications, including Chevrolet S10, GMC Sonoma, and Pontiac LeMans fitments. The LX-339 is a direct replacement choice for distributor-mounted ignition control service where heat, vibration, and moisture are common failure factors.

Key Features

• Female 3-pin connector with male blade terminals for distributor-mounted installation
• 12-volt ignition control module design
• Double wire bonds for stronger electrical connections and improved durability
• Copper slug heat sink construction to improve heat dissipation
• High-temperature polymer housing to reduce moisture intrusion and vibration damage
• Built to respond to weak crankshaft position sensor signals for quicker coil energizing
• Durability tested through 500 thermal cycles from -40C to +125C

Detailed Description

Standard Ignition LX-339 is designed for inside distributor use on a range of GM vehicles from the mid-1980s through the early 1990s. It addresses common ignition module failure points by combining improved heat management, vibration resistance, and stable electrical connections. That makes it a practical replacement for service on Chevrolet S10 and Camaro, GMC Sonoma, Pontiac Firebird and Fiero, and other listed applications.

This part cross-references NGK 7746 for the same application. Standard Ignition LX-339 is also listed among interchange references for OE-style replacement service where the original module has failed.

What It Helps Fix

• No-start or hard-start conditions related to ignition module failure
• Intermittent spark loss inside the distributor
• Misfire caused by heat-related module breakdown
• Starting issues in cold weather when coil energizing is delayed
• Problems linked to vibration, moisture intrusion, or weak sensor signal response

Installation Notes and Tips

Install the module inside the distributor only on applications listed in the fitment data. Verify connector style, terminal count, and voltage before replacement. Clean the mounting surface and inspect the distributor, crankshaft position sensor signal, and coil circuit before installing the new module. For best results, confirm the vehicle’s OE number and match it to the listed interchange references when diagnosing an ignition failure.

Quality Assurance

Standard Ignition manufactures electronic ignition components with in-process quality control from component selection through final assembly. The LX-339 is durability tested for thermal cycling and built with heat-dissipating and moisture-resistant materials to support long-term service in distributor ignition systems.