Mitsubishi Diamante intermittent starting issue possibly related to ignition system on Mitsubishi Diamante

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Mitsubishi Diamante owners report experiencing intermittent starting issues potentially linked to the ignition system. These problems may arise from a faulty starter motor or ignition switch, dirty spark plugs, or malfunctioning coils. Additionally, some owners have noted that the main relay for the computer could be failing. These issues can result in the engine not starting under certain conditions, particularly during humid or freezing mornings. To resolve these intermittent starting problems, it is often necessary to repair or replace components within the starter, ignition, or fuel systems. Proper diagnosis is essential to assess the extent of the repairs needed and their associated costs.

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