VN L3 Calibration - How To!

[88GreenVN]

This is a scan from the good old Holden hand book.

So people driving a VN with the L3 dash this is what you use to get the trip computer spot on.

Good luck its worth the effort.

[TVR-190]

On this topic does anybody know how to reset the total fuel used and trip time. I can only manage to reset the trip distance

[88GreenVN]

On this topic does anybody know how to reset the total fuel used and trip time. I can only manage to reset the trip distance

To reset computer:

Hold down the Reset button and press the Mode button.

Also DTE is calculated every 2 minutes.

[88GreenVN]

Here is the test mode to show fuel flow rate per hour. Should be between 1 - 5 Lts/Hr.

[TVR-190]

I had the book for my lexcen, whic included all this stuff, but i left in the lexcen when i sold it. should have made a copy....

[88GreenVN]

The second scan if from one of the proper Holden service manuals.

I want to know if the flow rate is at 5 instead of 1 or 2 does this mean the car is going to use lots more fuel or not.

On looking at it if the cars hourly flow rat is 5 litres instead of say 2 - it's gunna use lots more fuel.

Now does the hourly flow rate at idle say how the regulator is operating - like if it's 1 regulator is good - and 5 = buggered regulator?

[NickVR]

Well to give you an idea, a VE Berlina has a rate of about 2.3ltrs/hour on first start up. After it's warmed up it sits around 1.1-1.3ltrs/hour. Not sure if this info is relevant

[88GreenVN]

Well to give you an idea, a VE Berlina has a rate of about 2.3ltrs/hour on first start up. After it's warmed up it sits around 1.1-1.3ltrs/hour. Not sure if this info is relevant

Thanks - I'll check mine tomorrow & hope it's close to 1.5 ish

[Haydz]

Will this work on a vr level 3 ???

[88GreenVN]

Will this work on a vr level 3 ???

Should work - it's the same trip computer

[kniever]

can you please explain this better to me? sorry im shocking at maths sometimes

cal.(new)=cal.(old)x fuel use(trip computer)
---------------------
actual(service station pump)


and also why is it 625? once ya do that calculation will it work out to be a number say like 638?

[88GreenVN]

can you please explain this better to me? sorry im shocking at maths sometimes

cal.(new)=cal.(old)x fuel use(trip computer)
---------------------
actual(service station pump)


and also why is it 625? once ya do that calculation will it work out to be a number say like 638?

This is how I read it.

Lets say you fill up each week for 5 weeks 50 Litres each time = 250L

251.5 (TC)
250.0 (Pump)

251.5 div by 250 = 1.006

1.006 x 625 = 628.75

or

255 (TC)
250 (P)

255 Div by 250 = 1.02

1.02 x 625 = 637.5

or

249 (TC)
250 (P)

249 Div by 250 = 0.996

0.996 x 625 = 622.5

or

245 (TC)
250 (P)

245 Div by 250 = 0.98

0.98 x 625 = 612.5

Fuel flow balances the fuel put into the car to the amount the trip computer says been pumped out.

[Nevyn]

so given all that...u would have to write down how much went into the tank by the pump reading & how much was used by the Trip Computer reading before resetting the TC.........or would u just write down the pump reading & leave the TC till you have filled up at least 5 times before resetting

that sound right?

[88GreenVN]

so given all that...u would have to write down how much went into the tank by the pump reading & how much was used by the Trip Computer reading before resetting the TC.........or would u just write down the pump reading & leave the TC till you have filled up at least 5 times before resetting

that sound right?

It can be reset each time - you would need to collect the 2 sets of numbers each fill.

The book says 5 fills to get a good balanced number.

You should fill from the same place - pump even and the same way too. 2 clicks - 3.

[Nevyn]

I filled up today after using 64 liters (I put 13l in the other night before someones points out the obvious). The distance traveled was 610km. This was after 1 long trip on the freeways from the Valley to Epping and back, around 370km's....the rest was round town with a few trips to close by towns on the freeway.
Another 4 fills and I'll be checking the calibration.

[88GreenVN]

I filled up today after using 64 liters (I put 13l in the other night before someones points out the obvious). The distance traveled was 610km. This was after 1 long trip on the freeways from the Valley to Epping and back, around 370km's....the rest was round town with a few trips to close by towns on the freeway.
Another 4 fills and I'll be checking the calibration.

You can do the calculation for each fill - just dont change the trip computer until you get the 5 tanks of info.

[Nevyn]

I tried that by starting with the original full tank of 63l, then add the 13l I put in the other night = 76l....so if I take off the 64 the TC said was used it must mean I had 12l in my tank still. That sound right? And today it took 53l to fill up.

So if I've calculated right the equation should read like this:

51 / 53 = 0.9622 x 625 = 601.375

That good or bad......or just way out?

[88GreenVN]

I tried that by starting with the original full tank of 63l, then add the 13l I put in the other night = 76l....so if I take off the 64 the TC said was used it must mean I had 12l in my tank still. That sound right? And today it took 53l to fill up.

So if I've calculated right the equation should read like this:

51 / 53 = 0.9622 x 625 = 601.375

That good or bad......or just way out?

The numbers should be 13L + 53L = 66L

What did the TC say when the 13 & 53 went in?

[88GreenVN]

Also if you press and hold the reset button - 2 modes give the setting 625 for flow and distance. The other one will say how many litres are left in the tank.

[Nevyn]

The numbers should be 13L + 53L = 66L

What did the TC say when the 13 & 53 went in?

thought I buggered it up lol.....don't know what the TC was saying when I put the 13l in, but I didn't reset anything at that time. when I put the 53l in today it was saying 64l used. So is this right:
64 (TC)
66 (Pump)

64 div by 66 = 0.9696

0.9696 x 625 = 606

[88GreenVN]

thought I buggered it up lol.....don't know what the TC was saying when I put the 13l in, but I didn't reset anything at that time. when I put the 53l in today it was saying 64l used. So is this right:
64 (TC)
66 (Pump)

64 div by 66 = 0.9696

0.9696 x 625 = 606

Yep you got it.

Very early numbers though - it will be much closer when you add more refills to the total.

[Nevyn]

The numbers should be 13L + 53L = 66L

What did the TC say when the 13 & 53 went in?

thought I buggered it up lol.....don't know what the TC was saying when I put the 13l in, but I didn't reset anything at that time. when I put the 53l in today it was saying 64l used. So is this right:
64 (TC)
66 (Pump)

64 div by 66 = 0.9696

0.9696 x 625 = 606

Should I be using liters remaining or liters used? I'm taking it that it should be liters used.

[88GreenVN]

Should I be using liters remaining or liters used? I'm taking it that it should be liters used.

Yep Lts used. The flow rate is the way the TC balances the fuel in/fuel out

[Nevyn]

so even thou this only after 1 refill, how far would 606 be out and which way? The lower flow rate would mean I'm actually using more fuel than the TC is saying?

[88GreenVN]

so even thou this only after 1 refill, how far would 606 be out and which way? The lower flow rate would mean I'm actually using more fuel than the TC is saying?

Correct - but that can also be upto 1 lt variation on fillup. Like when you try to get the nearest dollar and go over and you can some times get 1 more dollars worth in.