Isuzu D-Max Engine Problems

We haven't had any other reports on the D-Max, but we have had reports on other makes. Toyota had lots of issues with diesels, which was related to the fuel-injectors. The first one I heard I thought had the death rattles. I wouldn't have believed it was related to the fuel-injectors, but replacing them fixed this car, at least for a time. I would go back to Isuzu and tell them you're not happy and want your car fixed.

It's a common complaint about diesels since we went to common-rail engines. Some claim it can be fixed be recalibrating the computer, others say the injectors need replacing. Consult a diesel engine expert.

The idle is too slow to maintain running, so check and clean the airflow sensor in the intake, and replace the air filter.

Coolant should be changed regularly, annually at least, but the interval should be shown in your service book. It can look a little oily, but that's not a problem, and as your vehicle is running well with no sign of a problem I wouldn't be concerned, but do change the coolant.

It’s clearly frustrating you, but I don’t believe you’ve copped a lemon on the basis of what’s happened. Isuzu fixed the diff, end of story, they also replaced the first pump under warranty, again end of story. The issue is why have two pumps failed, and why didn’t Isuzu cover the second pump. These are questions I would be putting to Isuzu. I’m guessing that the second pump wasn’t covered because the warranty had expired after three years.

It would suggest it wasn’t the throttle position sensor that was faulty, but it could be a connector to the sensor that has caused the problem. If that isn’t the problem look elsewhere, and I would suggest the crank angle sensor.

Don’t mess about fit another EGR valve.