Mitsubishi Pajero 2004 Problems

Backfiring is usually caused by a problem with the ignition system, and usually fixed by replacing the spark plug leads. It happens when the LPG/air mix in the intake manifold is ignited by a random spark, and it often results in the air intake and filter being blown away. It is unusual to damage the catalytic converter and have the computer meltdown, and damage to the auto trans is unheard of. Check the ignition system and certainly replace the spark plug leads, and have the auto checked by a specialist.

The diesel engine has a chain, so there's no requirement to replace it as there is with a belt.

I would have the auto transmission serviced and checked, that’s where your problem is likely to be.

I WOULD like to be able to confirm that the problem with the 3-litre turbodiesel engine has been fixed, but I can't. My attempts to get Nissan to own up to a fix have been a dismal failure. All it would tell me is it would take care of owners of any Patrol that had an engine problem. Read into that what you will.

It’s either getting too much fuel or not enough during the cold phase. If it’s getting too much fuel it’s likely to be due to worn fuel injectors that are leaking down while the car sits overnight and essentially flooding the engine. Although you say you have replaced the injectors, you don’t say you used new parts, so I would still look there. It could be though that the temperature sensor that tells the computer that it needs to boost the fuel for a cold start is faulty and the message is not getting through.