Thread: How to improve 4.6 economy

I just got back from the cape mate, was a great trip!

Words of wisdom from me - Take the tele track north and take the northern section of the tele south, the bypass road for the northern section has corrugations the size of speed humps. The rest of the developmental road was good. We went through Lakefield both north and south as the developmental road in that section is also pretty bad from what we heard.

None of the creek crossings stopped us, but last count was 88 vehicles drowned this year at Nolan's brook. The Frenchmans track is also worth a look if you have a day to do it.

Enjoy your trip!

EDIT: just had a thought .. the injectors may be quite OK. It's running rich because the injectors are being "commanded" to let in more fuel by the ECU. The ECU calculates oxygen content of the air as determined by the MAF taking account of the ambient temperature as well as fuel temp.

The ECU "thinks" that there's too much air i.e the air/fuel mix is running "lean" so it's enriching the mix accordingly. The fuel odour at idle tends to confirm this. I 've only had a cursory glance at the posts to date, but MAF and air/fuel temp. sensors don't seem to have been discussed. The sluggish engine response you reported is one symptom of a MAF needing attention. It might just require a squirt of MAF cleaner to remove accumulated crud off the sensor wire (non-residue disc brake cleaner will perform the same job at a pinch DON'T USE WD40!!)... careful, the sensor wires are fragile.


Yeh, that. You're on the ball Hoges.
Gems will run off of lookup tables with no maf. It uses the air temp and throttle position sensor.

If it still won't play cricket it may be the fuel return pipe is blocked.

All the best for the Cape, im jelous everytime I hear of someone going up there (cough...Kiethy)

It's almost the wet season though isn't it?

Still got two months til the rains up that way!

Everyone should go!

Planning on doing the Tele track travelling north and definetly doing frenchmens, the defender is going to be pretty well setup but i will be towing a camper through a lot of it, also really keen to check out old coach road. how did you go with the camp site booking system up there?