Parts for your 1999 Nissan Pulsar-Egr valve

1999 Nissan Pulsar EGR Valve — what it does, why it matters, and how to look after it

For the 1999 Nissan Pulsar (N15 series, GA16DE 1.6 and SR20DE 2.0 petrol), an EGR valve is fitted and absolutely relevant. This is documented in the Nissan Pulsar N15 Factory Service Manual (EC – Emission Control, “EGR System”), reflected in Autodata’s emissions coverage for the N15, and covered in Gregory’s/Nissan Pulsar N14–N15 workshop manuals, all of which show an exhaust gas recirculation valve and associated control hardware for Australia and New Zealand markets to meet ADR emissions requirements.

The EGR valve’s job is simple but critical: it meters a small amount of exhaust gas back into the intake under specific conditions. That lowers combustion temperatures, which cuts nitrogen oxides (NOx). On the N15, it’s a vacuum-controlled setup with ECU command, using a control solenoid and a back-pressure transducer. When it’s working right, the car runs cleaner and can feel smoother on cruise.

What goes wrong? Mostly carbon. Over time, soot builds up in the valve and the intake passages, causing a sticky valve or blocked ports. That can show up as pinging under load, a lumpy idle, stalling when coming off throttle, poor fuel economy, or the check engine light with EGR-related fault codes (common ones include P0400/P0401/P0402).

Maintenance during regular servicing pays off:

• Inspect and clean: every 40–60,000 km, check the EGR valve and the inlet port for carbon. Use a quality EGR/throttle-body cleaner.
• Vacuum lines: brittle hoses and cracked tees are common—replace any that look tired.
• Control gear: confirm the EGR control solenoid clicks when commanded and that the valve moves with applied vacuum.
• Gaskets: always fit a new EGR gasket after removal to avoid leaks.

Replacing the valve is a straightforward driveway job for a careful home mechanic. Let the engine cool, disconnect the battery, label the vacuum hoses, soak the fasteners with penetrant, and remove the two mounting bolts. Clean the mating surfaces and the intake passage, then refit with a new gasket and correct torque. After reconnecting, drive the car through a few warm-up and cruise cycles so the ECU can settle its trims. Don’t be tempted to blank the EGR—besides being unlawful under local regs, it can raise NOx and increase knock risk.

If there’s persistent pinging, rough idle, or repeat EGR codes after cleaning, a new valve and a fresh set of hoses usually sorts it. On older N15s, budgeting for both parts and a bit of carbon clean-out is a smart move.

Popular questions about 1999 Nissan Pulsar EGR valves

Does every 1999 Pulsar in Australia and New Zealand have an EGR valve?
Yes, the N15-series 1999 Pulsar petrol models (GA16DE and SR20DE) for AU/NZ are equipped with EGR to satisfy local emissions rules. You can spot the valve at the back of the cylinder head with a metal pipe leading from the exhaust manifold and small vacuum hoses on top.

Some overseas markets differed, but local vehicles use EGR as shown in factory service documentation and mainstream workshop manuals for the N15.

Can the EGR valve be cleaned instead of replaced?
Often, yes. If the diaphragm still holds vacuum and the pintle moves freely, a thorough clean of the valve and intake passage can restore operation. Also clean the EGR port in the manifold and refresh any cracked hoses.

If the valve won’t hold vacuum, the shaft is badly worn, or codes return quickly after cleaning, replacement is the better long-term fix.

What fault codes point to an EGR issue on an N15?
Common ones are P0400 (EGR flow malfunction), P0401 (insufficient flow), and P0402 (excessive flow). These can be caused by a sticky valve, blocked passages, failed control solenoid, or vacuum leaks.

Before replacing parts, verify vacuum supply, solenoid operation, and that the intake and EGR passages aren’t choked with carbon.