Holden jackaroo 3.2 v6 auto

I was once getting poor fuel consumption on my 3.6 V6 Jack but was also experiencing uneven idling and a strong smell of rich fuel mixture at times.

Turned out to be a leaking inlet manifold gasket.

Bill.

Hi David,
I had a 3.2lt Jack for 8 years & your milage unloaded should be much better, I suggest you replace the Oxygen sensor in the exhaust manifold this will cause the issues your are experiancing. Don't buy it from holden or you will need a 2nd morgage pick it up aftermarket for approx $70-80 quick to change & has a connetor to plug in.
cheers Simon.

Try cleaning the oxygen sensor first it worked with mine.

Firstly most parts are available at repco for a lot less then Holden. Is it and auto or man?. The diff in fuel ecomony is roughly 100ks per tank. We have 3.5s in man and auto.
Things you can do to improve economy new plugs. new air filter, clean maf(I presume 3.2s have them) New oxeygen sensor, check egr valve is not blocked, clean throotle body . Put some injector cleaner through it and three tanks of premium fuel and lastly a very worthwhile mod on 3.2s is to remove the restrictors in the Y piece of the manifold. Now a lot of exhaust p-laces and mechanics will not believe they would put restrictors their, but trust me they are unless already removed. This mod alone is worth 1l/100. Downside a bit more of a throaty rumble when foot is to the floor but not unpleasant.
Also mufflers can also block up causing back pressure.
The good thing is your motor is one of the most durable motors out their if well serviced.
One other thing what oil are you running? I have switched to 10/30.
I get 400 ks towing my boat with 15l left in tank and up to 550 empty and that is out of a 3.5 with b/bar and ats.
That is the last thing b/bar and ats are worth 1/100 ea. buddies expect much more. Have you changed tyres.
Have it serviced and change all filters(fuel, oil air) first off.
Cheers Pete