Parts for your 1987 Suzuki Swift-Ignition leads

1987 Suzuki Swift ignition leads — what they do and how to look after them

Ignition leads are absolutely relevant on a 1987 Suzuki Swift. Technical references including the Suzuki Cultus/Swift Factory Service Manual for the SA/AA chassis (Ignition System section), the Haynes Repair Manual for Geo Metro/Suzuki Swift/Pontiac Firefly (covering mid‑80s to early‑2000s distributor systems), and OEM/aftermarket parts catalogues listing spark plug wire sets for G10 (1.0L) and G13A (1.3L) engines all specify high‑tension (HT) spark plug leads. These models use a distributor, cap and rotor with individual leads to each spark plug.

On this vintage Swift, the ignition leads carry high voltage from the distributor to the spark plugs so each cylinder gets a strong, well‑timed spark. Healthy leads help it start crisply on cold mornings, run smoothly around town, and pull cleanly up hills without a cough. Age, heat under the bonnet, oil mist, and tugging on the cables can break down the insulation or the conductor inside, which shows up as misfires under load, rough idle, higher fuel use, and that tell‑tale snapping or arcing in damp weather.

As part of routine servicing, it’s smart to check the leads at every service and replace them about every 60,000–100,000 kilometres or 5–7 years, sooner if there are symptoms. On an ’87 Swift, many original‑style carbon‑core leads are well past their prime by now. When replacing, choose quality silicone‑jacketed, suppression‑type leads that match the engine: three leads for the 1.0‑litre G10, four for the 1.3‑litre G13A. Keep them routed in the factory clips and away from hot exhaust components to prevent crossfire and heat soak.

• Replace one lead at a time to avoid mixing up firing order.
• Seat the boot firmly on the plug and distributor until it clicks, don’t pull on the cable.
• Wipe leads clean, light dielectric grease on boots helps sealing and future removal.
• Inspect the distributor cap and rotor for tracking or wear, and fit new spark plugs if due.

If you’re chasing a niggly misfire, a quick resistance check with a multimeter and a dark‑garage look for arcing can reveal a tired lead. Getting the leads right on this era of Swift restores that cheerful, economical runabout feel and keeps the little G‑series engine happy on Aussie and Kiwi roads.

Popular questions about 1987 Suzuki Swift ignition leads

How often should the ignition leads be replaced?
For most ’87 Swifts, every 60,000–100,000 km or roughly every 5–7 years is a sensible interval, but hot climates, stop‑start use, and oil contamination can shorten their life. If there’s a misfire under load, rough idle, or visible cracking, replace them sooner rather than later.

How can they be tested at home?
Visually inspect for cracks, burns, or green corrosion at the terminals. In a dark space, look for arcing while the engine idles. With the engine off, measure each lead’s resistance end‑to‑end with a multimeter and compare lengths, any lead that’s open‑circuit or wildly higher than its mates is a candidate for replacement.

What else should be changed with the leads?
It’s good practice to check or replace the distributor cap and rotor and fit fresh spark plugs at the same time. Keeping these parts in step helps ensure a strong spark and smooth running. Always route the new leads in the factory order clips to prevent crossfire.