Hey mate, did you find out the root cause?
Hi there, I want to say yes, yes, yes, I'm just a little nervous to say it from the roof tops just In case.
A couple of weeks ago my wife drove the car to soccer training on another cold Canberra night. An hour later when attempting to start the car it was dead. Fingers crossed it is just the battery I called roadside assist and within 30 minutes I had a brand new battery and she started first go. Roadside assist was surprised to say it's the original battery now almost 9 years old.
Since installing the new battery we haven't had a single instance of the stutters. It makes me wonder if the slight gradients at 2000rpm exposed the age of the battery and caused it to exibit an intermittent fault. Not being a battey guru i can only imagine sludge in the bottom potentially shorting out some of the plates, who knows.
My attempts to fix the problem resulted I a new MAP, MAF, cleaning the throttle body the EGR and applying a restriction plate. The car starts well however is still a little smokey. I found the intake manifold is coked up as seen in many of the forums so tonight I dropped her off at Chris Hedges to have the manifold removed and cleaned, a full service and the timing belt replaced as its at 120k and the last one was done three and a half years and 60k.
I would like to suggest a thorough check of your battery and interested to find out if it's the original as was mine?
I will also share the outcome of the manifold clean at the end of the week, fingers crossed there is nothing else found at the same time.
PS it's a manual and I'm looking forward to driving it again.