Hi stu/nando
thanks for the replies, the info has been very informative. Just for interest, i had a quick chat to the local mitsi dealer and explained the problem. Their reply was as follows:
"Hate to say this but a tune up won't fix your problem. A rough idea for costs
is $1800.00 for a fuel pump $600.00 for injectors and 1200.00 for a decarb" - (nz dollars)
Some how i think you suspusions on their advice may be correct. They seemed to be treating this matter as a form of income as oppose to servicing their clients. I can tell you one thing, this is my first and probably last mitsi purchase....and i will be sure to share my opinions where ever possible!
I'll give the caltex stuff a go for the mean time and see how i go.
Anyone out there after a cheap mitsi!