Parts for your 2000 Mazda Premacy-Ignition coils

2000 Mazda Premacy ignition coils — what they do and when to replace

Yes, ignition coils are relevant on most 2000 Mazda Premacy models. The petrol 1.8 (FP-DE) and 2.0 (FS-DE) engines use a distributorless ignition system with two twin-tower ignition coils firing pairs of cylinders in a waste-spark setup. This is documented in the Mazda Premacy (CP) Workshop Manual, Ignition System section (1999–2001), and supported by aftermarket catalogues from OE suppliers such as NGK/NTK and Denso that list direct-replacement coils for these engines. Note: the 2.0 diesel variants don’t use ignition coils at all, diesels rely on compression ignition and glow plugs for cold starts.

On petrol Premacy models, ignition coils step the 12-volt battery supply up to tens of thousands of volts so the spark plugs can ignite the air–fuel mix. Each coil serves two cylinders, so when a coil weakens you’ll often feel a misfire on a pair of cylinders, especially under load or when hot.

Common signs the coils are on the way out include rough idle, hard starting, hesitation on hills, higher fuel use, a sulphury exhaust smell, and a check engine light with misfire or coil circuit codes (often P0300–P0304 and P0351/P0352 on these engines). Left too long, a weak spark can shorten the life of the catalytic converter.

There’s no fixed replacement interval for coils, but they should be inspected at each major service. On a 2000 Premacy that means checking for casing cracks, carbon tracking, heat damage, and loose or corroded connectors. Because the FP/FS engines use plug leads, it’s smart to replace aged leads with the spark plugs to reduce stress on the coils. Keep water and degreaser away from the coil area under the bonnet—moisture can tip a marginal coil over the edge.

Replacement is straightforward: disconnect the battery, label the HT leads so the firing order doesn’t get jumbled, unbolt the old coils, and refit quality OEM or reputable aftermarket units. A light smear of dielectric grease on the lead boots helps future removal and keeps moisture out. Tighten the mounting hardware evenly (don’t overtighten), clear any fault codes, and take a test drive to confirm the misfire is gone.

As preventative care, use the correct spark plugs and change them at the recommended intervals, tired plugs make coils work harder. If you’re chasing an intermittent misfire, a workshop can bench-test coil resistances and run scope tests against the Mazda specifications. Technical sources: Mazda Premacy (CP) Workshop Manual 1999–2001, Ignition System (FP/FS), NGK/NTK Ignition Coils Catalogue (Premacy 1.8/2.0, 1999–2001), Autodata technical data for Mazda Premacy 2000 ignition system.

• Petrol 1.8/2.0: uses two ignition coils (waste-spark, with plug leads)
• Diesel 2.0: no ignition coils (uses glow plugs and compression ignition)

FAQ

How many ignition coils does a 2000 Mazda Premacy have?
Petrol models have two twin-tower ignition coils that fire pairs of cylinders in a waste-spark setup. The 2.0 diesel models don’t use ignition coils at all, they use glow plugs and compression ignition, so if yours is a diesel, you won’t be looking for coils.

What are the signs my Premacy’s ignition coils are failing?
Look for a rough idle, stumbling under load, poor fuel economy, and a check engine light. It’s common to see misfire codes (P0300–P0304) or coil circuit codes (P0351/P0352) on the petrol FP/FS engines. If symptoms get worse in the wet or after a hot soak, that also points to coil or lead breakdown.

Should I replace coils, leads, and plugs together?
On these engines it’s often worth doing coils, leads, and plugs as a set if they’re all aged. Fresh plugs and leads reduce the voltage demand on the coils and help new coils last longer. If budget is tight, at least pair new coils with quality leads and the correct spec plugs.