Parts for your 2002 Daihatsu Gran move-Ignition leads

2002 Daihatsu Gran Move ignition leads — what they do and when to replace them

For the 2002 Daihatsu Gran Move (G303/G313), ignition leads are very much a thing. Technical references including the Daihatsu Gran Move workshop manual for the G303/G313 series (Ignition System section) describe a distributor-type ignition with spark plug cords, and major aftermarket catalogues from NGK and Bosch list complete ignition cable sets for the 1997–2002 Gran Move 1.5. That means this model uses high-tension (HT) leads to carry spark from the coil/distributor to the plugs.

On the Gran Move, the ignition leads’ job is simple but critical: deliver a strong, clean spark to each cylinder at the right time. Good leads help the 1.5-litre petrol engine start crisply, idle smoothly, and pull cleanly through the revs. As the rubber and insulation age, heat and oil exposure under the bonnet can cause the leads to harden, crack, or leak voltage. That’s when owners see misfires, rough running, poor fuel economy, or a check engine light on wetter days.

As part of routine servicing, it’s smart to inspect the leads every 20,000–30,000 km. Look for perishing, burns, or green/white corrosion at the terminals. At night, a quick mist of water around the leads while the engine idles can reveal arcing. If there’s any doubt, replacement is inexpensive peace of mind.

When fitting new leads, they should:

• Be matched to the engine code and lead length layout listed for the Gran Move.
• Be routed in the factory clips and separators to avoid crossfire and chafe.
• Have clean, snug terminals, a dab of dielectric grease in the boots helps future removal and seals out moisture.

It’s good practice to change the spark plugs at the same time. Always swap the leads one at a time to keep firing order correct. If the distributor cap and rotor show tracking or worn contacts, replace them too — a fresh cap/rotor with new HT leads restores a crisp spark and keeps the little Daihatsu feeling eager.

Most owners will see reliable service life of 60,000–100,000 km from quality leads in Aussie and Kiwi conditions, but city heat, dusty roads, or oil leaks can shorten that. If the Gran Move hesitates under load, idles lumpy, or uses more petrol than it used to, the ignition leads deserve a spot high on the checklist.

Popular questions about 2002 Daihatsu Gran Move ignition leads

How often should Gran Move ignition leads be replaced?
Many owners replace them around 60,000–100,000 km, or sooner if there are misfires or visible damage. Because the Gran Move runs a distributor system, fresh leads can make a noticeable difference to cold starts and fuel use.

What are the symptoms of failing ignition leads on this model?
Common giveaways are a rough idle, hesitation under load, ticking or arcing sounds, and worse fuel economy. In wet weather, it may be harder to start. Under the bonnet, cracked insulation or green corrosion at the ends is a red flag.

Can they be replaced at home?
Yes, it’s a straightforward DIY for most. Swap one lead at a time to keep the firing order correct, route them in the factory clips, and use dielectric grease on the boots. If the distributor cap/rotor look tired, replace them together for best results.