Fuel Consumption. 4.2 EFI about 22 L per 100ks

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Originally Posted by dom14

Hey BillyJ,
How did you manage 13L/100km economy on TB42?!
What did you do to get that economy?
Thanx mate

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no idea how i pulled it off, but on a trip out dargo way it did 13l per 100km on the fwy between werribee and sale

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Originally Posted by billyj

no idea how i pulled it off, but on a trip out dargo way it did 13l per 100km on the fwy between werribee and sale

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I thought you might have done some clever tweaking of the ignition & fuel system to get that, and probably some diff/tranny/wheel size tweaking as well. Either way, I'm sure it's quite doable, just not sure how to approach it without spending a fortune.

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Originally Posted by kbchez

What was the nissan saying when they first came out about the fuel consumption.. that would be interesting

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Just so happens I have an early road report which states the following ::
A SWB auto will return 18.8/100km
LWB manual wagon 14.8/100km
and the trusty 4.2td about 11.3/100
their figures not mine 4x4 aust magazine

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Originally Posted by kbchez

thanks all,
I'm in Albany WA.
A scan tool would be great, The first thing I changed was the thermosta. put in a high flow. The old one was not opening properly and it was bent.
That scan tool you are talking about is it a OB2 scantool. The sparkplugs are a white colour. Timing light on order. via ebay.So I cannot do much more till the timing is reset. I do know that if its close the ECU computer should work it out to correct timing. So Im just going to turn the dissy till it sounds better for now.
I have been thinking thats dangerous. These patrols where proberly designed for the US market. so fuel consumtion not a worry. Most likely If these machines where geared down about 500RPM. fuel usage would improve. But what a drama that would be. Is the Auto gear boxes on the petrol the same as the diesel. ??????.....

thats enough for now lol.

Thanks
Kevin

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If you follow the part numbers of the auto tranny between petrol & diesel one from the repair manual, that should be able to tell you.
I thought turning the dizzy is a no gone zone for EFIs as the advancing/retarding is done by the ECU once the valve timing is set manually.

nah nothing clever, just 2" lift 33"s and loaded to the hilt heading bush. i couldnt believe it so i had 3 people check my calculations

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Originally Posted by billyj

no idea how i pulled it off, but on a trip out dargo way it did 13l per 100km on the fwy between werribee and sale

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Sure it wasn't between Hotham and Sale ??............. Downhill with a tailwind and it's ears back ?

My 4.2 efi manual gets 22/100km LPG, the old 4.2 carby auto had no trouble burning 30/100km.
Might have to take the rocks out of me Blunnies.

yep im sure, only thing that i can say it it was not long after doing the head so everything was fresh, plugs leads, injectors cleaned, new 02 sensor, new temp sensor/sender etc

Hey Billyj, I have found the ECU stuff on the net It looks like I just need to purchase the plug and cable , already down loaded the software for it.

Once the cable turns up I supose its going to be a real learning curve for me.

all the software and cable will allow it to read the sensors in real time, so you will see differnt numbers going up and down etc, it showed i had a blown o2 sensor as its voltage should fluctuate and it was sitting on a steady .3v and never moving fitted a newie and moving between 0-1v like it should

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Originally Posted by billyj

nah nothing clever, just 2" lift 33"s and loaded to the hilt heading bush. i couldnt believe it so i had 3 people check my calculations

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You must have done something right probably following a bit of gut feeling.
That economy is damn good.
I would like to get good fuel economy from my troll(RB30 LPG), without shortening the lifespan of the motor, of course.
I haven't seen any difference between EFI converted RB30 & properly tuned carby/mixer RB30.
Of course, I'm going by what I've heard so far.