Parts for your 1993 Mitsubishi Pajero-Camshaft sensor

1993 Mitsubishi Pajero camshaft sensor — what’s fitted and how to look after it

Technical references show the 1993 Mitsubishi Pajero may use a camshaft position sensor, depending on engine. Petrol V6 models (6G72) have an optical cam angle/camshaft position sensor built into the distributor. This is documented in the Mitsubishi Pajero NH/NJ factory service manual (Engine Electrical—Ignition) and echoed in common repair guides for the 1992–1994 Montero/Pajero noting the CMP is inside the distributor. By contrast, many diesel variants of this era (e.g., 4D56 2.5 TD with a mechanical pump) don’t use a separate camshaft sensor, while later 4M40 2.8 TD engines rely on pump/flywheel timing sensors rather than a conventional CMP. Gregory’s/Gregory’s/Gregory’s and Haynes-style Pajero manuals for 1991–1996 cover these layouts as well.

For Pajeros fitted with the sensor (notably the 3.0L V6), the camshaft sensor’s job is to tell the ECU exactly where the cam is in its rotation. That info lets the ECU fire the injectors and spark in the right order and at the right time, helping cold starts, smooth idle, crisp throttle response and decent fuel economy. If the signal goes walkabout, the ECU can’t sync properly, so the V6 may crank longer, stumble, misfire, drop power or log a fault light.

These V6s house the sensor inside the distributor body, so “replacing the cam sensor” can mean changing the internal optical pick-up or, more commonly, swapping the complete distributor with a quality unit. Either way, a quick visual once-over during servicing goes a long way: check the distributor cap and rotor for wear, look for oil wicking into the distributor (often from a hard O-ring), and make sure the CMP connector and loom aren’t brittle or green with corrosion. A dab of dielectric grease on clean terminals helps in our humid/coastal conditions.

If the sensor fails or is flaky, many techs will replace the distributor assembly, mark the base timing position and recheck timing with a light afterwards to factory spec. Cheap, no-name internal sensors can be hit-and-miss, so stick with reputable parts. It’s also smart to scan for codes first and rule out a crank sensor or wiring fault, as those can mimic CMP issues.

• Hard starting, rough idle or random stalling
• Flat spots on acceleration or poor fuel economy
• Intermittent check engine light tied to cam/crank sync

If those crop up on a 1993 petrol Pajero, put the cam sensor/distributor on the shortlist before it leaves you stranded out bush.

FAQs

Where is the camshaft sensor on a 1993 Pajero?
On petrol 3.0L V6 models, it lives inside the distributor as an optical pick-up. Many 2.5 TD diesels of the same era don’t use a separate cam sensor, and the 2.8 TD typically relies on pump/flywheel timing sensors instead.

Can a faulty camshaft sensor stop a 1993 Pajero from starting?
On the petrol V6, yes—if the ECU can’t sync, it may crank with no start or run poorly. On diesel variants that don’t use a CMP, starting problems are more likely related to crank/TDC or pump timing signals, fuel supply, or glow systems.

Does the camshaft sensor need routine servicing?
There’s no set service interval, but it’s wise to inspect the distributor internals, seals and wiring during regular services. Keep moisture out, replace a leaking O-ring, and ensure clean, tight electrical connections.