Kevin Romano
Cairns, Qld.
Q
The motor in my 2007 Nissan Navara 2.5-litre turbo-diesel stutters or hesitates and makes a pinging noise when it's cold, but it's okay when it's warm. I have had it to two mechanics and they couldn't fix it. What's wrong?
Graham Smith
Ask Smithy
A
Check the injectors, your problems are most likely there.