fuel consumption 80 series cruiser

[tallpaul]

Hi.

I have just put another 4.5 litre motor in my 80 series landcruiser, and the around town consumption is around the 21 Litres to the 100, the older motor that was in it seemed to be getting better fuel consumption.

I filled both tanks about 2 weeks ago did 550 K and put 116 litres in, that should equate to about the 21/100.

Is anyone else getting that sort of fuel use around town, as i would expect 16-18 around town.
When i first bought the 80 Series i did a trip to QLD and on Hwy cycle I was getting about 12.5 to the 100.
Could anyone suggest if the problem may be mechanichal????
Not a leadfoot. Tall Paul Newcastle:waycool:

[gtir300]

I get about 20-25l/100km with 4" lift 33 muds and roofrack. I need to check and replace ignition components to see if I can improve this tho!

I would suggest checking all fuel connections from when you did the engine swap. Also check the oxygen sensor, these things do play havoc with fuel economy when they stuff up. Other things would be ensure the timing is set correctly. Silly but check the brakes arent dragging too.

Dunno if you get it down to the 12.5l/100 (thats an incredible figure, well done!) but the above should help.

[ookami]

On the way to a job site this morning i grabbed the sept issue of the magazine and was just now reading the 80 vs 100 vs 200 article and saw that the 4.5L petrol 80 had the best fuel ecconomy of 13.6L on the test. One thing you can try is replacing your O2 sensor in your exhaust, this alwasy made a huge difference to the Nissan RB series vehicles i have owned over the years. Do the 4.5L have a AFM or Map sensor?

[Sic Lux]

AFM. Check the ducting on the whole intake system starting to see more and more of these crack with age not only on 80's like always check plug leads coil lead and coil for restistance also cap and rotor condition compression test the engine and maybe throw a set of plugs at it.

[tallpaul]

Thanks for the replies.
I will take all that on board and work through the systemto try and find the offending part or parts.
tallpaul .
Newcastle, Home of the Watagans stockton, and Mount sugarloaf tracks.:truck:

[Pog]

On the way to a job site this morning i grabbed the sept issue of the magazine and was just now reading the 80 vs 100 vs 200 article and saw that the 4.5L petrol 80 had the best fuel ecconomy of 13.6L on the test.
I must admit I had my doubts when I read that.

[MONTY42]

I've got a 94 GXL 4.5 Litre with 5" Suspension Kit pushin 315 MTZ's with all the heavy bit's and pieces. I average around 17 litres per hundred. I got mine dyno tuned to check all the sensors but mainly to play around with the timing. If you look through the Toyota Tech folder and ask for the timing advice some one should have the how to do instructions to advance it as this helps, but be careful as you don't want it to ping.
Also I was a big sceptic about the whole Premium versus regular unleaded until I tried it, I get 100+ more km's out of the two tanks.

[cape_ablecruiser]

I've got a 93 GXL 4.5 with OME 2" and 33 BFG MT's and get 13.4l's/100 when driven about 20% round town under light foot) and 80% highway unloaded.
Recently it started performing poorly and the fuel consumption went to 16 to 18 litres / 100. She's got 287 000 kms on the clock now so I figured the motor was on the way out. I took it to Toyota for an engine assessment and mechanically she came back fine with 190 - 200psi per pot. (the money spent on mobile 1 over the years may be paying off!).
Toyota said my air flow metre was stuffed. This may have been caused by oil from my unifilter travelling through the meter.
As mine is the old vein type metre I wasn't convinced. They wanted $1100 for a new one plus fitment.
Sure enough when I went home and pulled it apart they were correct.
I have cleaned it all out with contact cleaner. Cleared the codes from the ECU (I wish I would have checked them before taking it to Toyota!) the ECU codes were showing code 24 - intake air temp sensor and code 32- air flow metre circuit. She's all good again and the fuel consumption back to normal.
I now run the Toyota air filter again. Anyone want to buy a used Unifilter in good nick? :)
CC
PS Monty 42 - these fuel figures run on 98 octane. 14.2 l/100 on 91/92 octane over the same roads to work. This also works out to around 100km extra over the 2 tanks.

[Judgey]

cape_ablecruiser

How were you able to get the codes from the ECU?

I have a 93 GXL 4.5 as well

Thanks

[tallpaul]

I got my mechanic to test the oxygen sensor today, and it would appear that it is stuffed.

Can you clean these????
New One.....$320 from Mr Toyota san
Repco $290
Anyone know where else you can get an aftermarket one....

One from Wreckers?? Might get another one thats stuffed.
Any sugestions.Tall Paul:truck:

[cape_ablecruiser]

cape_ablecruiser

How were you able to get the codes from the ECU?

I have a 93 GXL 4.5 as well

Thanks

Judgey,

I got most of them straight out of my Gregory's Manual.

I have been able to gleen a couple of others from some toyota mechanics over time eg.
The exhaust O2/temp sensor fault for the 80's is code 21 or code 28 if you have a 90 series prado.

Cheers

CC

[cape_ablecruiser]

I got my mechanic to test the oxygen sensor today, and it would appear that it is stuffed.

Can you clean these????
New One.....$320 from Mr Toyota san
Repco $290
Anyone know where else you can get an aftermarket one....

One from Wreckers?? Might get another one thats stuffed.
Any sugestions.Tall Paul:truck:

Tallpaul

3-4 years ago i replaced one which cost $300 fitted by Toyota.
I couldn't find a decent alternative at the time.

Since my previous post on this subject I have managed to find a local company that refurbs some electronis eg the mass air flow meter.
They do a referb for $300 with waranty so you may find something.

Goodluck!
CC

[cape_ablecruiser]

BAd TyPOs CC!

[Oz Cruisin]

I got my mechanic to test the oxygen sensor today, and it would appear that it is stuffed.

Can you clean these????
New One.....$320 from Mr Toyota san
Repco $290
Anyone know where else you can get an aftermarket one....

One from Wreckers?? Might get another one thats stuffed.
Any sugestions.Tall Paul:truck:
I just got a quote today from repco coopers plains brisbane for $127,i've a 93 4.5 myself going threw the same motions 250km/80L towing around town.You can also get a GREGORY'S work shop manual for a 4.5 between 92-98 from drysdale auto books at bowen hills qld.All the other books cover to many models and motors.:crazy:

[tallpaul]

Went to supercheap auto this morning.
Apparently they should be able to get an oxygen sensor from SA for about $110 plus postage.

Thanks for all the advice.
Hopefully a new sensor should rectify the Problem
Tall paul
Newcastle:truck:

[cape_ablecruiser]

Went to supercheap auto this morning.
Apparently they should be able to get an oxygen sensor from SA for about $110 plus postage.

Thanks for all the advice.
Hopefully a new sensor should rectify the Problem
Tall paul
Newcastle:truck:

Great News Tallpaul. I look forward to hearing how it goes.

When I have replaced/repaired anything in the ECU circuit in the past on my 80, I have found it fairly slow to tune in to the replacment/repaired part.
The Gregorys manual will tell you to remove the EFI fuse to reset any fault codes in the ECU. This definatly works but in my experience it's still slow to tune in.

I have found mine tunes in faster by disconnecting the battery, which seems to completely reset the ECU.

I'd be interested to hear what others have found.

Cheers CC.

[tallpaul]

How the hell do you get the oxygen sensor out???
Toyota has conveniently located it under the drivers side , with an angled surround on it, Most likely to suppress spray from the drivers side wheel.
It looks as though the sensor was put on the exhaust first then the exhaust bolted up.
I have side steps mounted as well, so the supporting rail for that is also in the way.
looks like a half a day on the mechanics hoist to remove it.
Could an exhaust shop mount it closer to the manifold for ease of checking or removal, I could just unplug the connector and move the sensor up further into the engine bay...
Where toyota have located the sensor on the 80 series seems really stupid, as thats where you cop all the water, mud and other crud..
Any suggestions.
Tall paul.
Newcastle:truck:

[cape_ablecruiser]

TallPaul,
My next comment is only hearsay so I'm more that happy for someone to clarify/confirm/deny.

I think the o2 sensor also monitors exhaust temp on some models. If that is the case the question I would be concerned about was if you moved the sensor too close or too far from the original (read from the exhaust manifold) spot would the change in temp effect the tuning circuit?

Any one with any thoughts or can clarify?

I have an after market exhaust so I can't help re how to get to it.

CC

[davepom]

na mate the o2 sensor does not monitor engine temp, it does however need to get to a certain temp before it will operate now on the 80 i think it has a three wire o2 which means it has a heater inside it to allow it to warm up quicker .

[pdr]

I have 92 4.5 and was just wondering exactly how to get codes from ecu. Mine is using about 20 liters a hundered on the highway and am thinking i would like it a bit better, I do have front and rear steel bars and a roof rack but fuel consumtion still seems a bit high from what others have been saying.

[No Fn Idea]

Hey TallPaul

How'd you go with the o2 sensor?? Did it improve your economy at all?

I just got myself a 93 GXL with the 4.5 and would like to get the best economy I can. I'm gunna clean the AFM to see if that makes a difference. And then I'll look at the o2 sensor to see if that is stuffed.

I got a code reader in the pile of spare parts I got with my cruiser - I have no idea how to use it or even if it works but it sounds like I'll have fun on the weekend figuring it out.

Cheers
Nick

[Sharky71]

The mileage you guys are getting I would have loved to have gotten I dont have it anymore but I had a 94 mdl 4500 auto on dual fuel A/T's 2 inch lift roofrack bullbar usual stuff and the best I ever got was I think about 28/100k's averaged 30-31/100k's. For 90 litres of fuel I got about 300 k's so there is a comparison for ya. I had everything checked 02 etc etc etc dynoed 4 times.:( :( :( Oh and it had only done about 230 k's.

[tallpaul]

Got the old sensor out replaced it with a newie.
Fuel consumption now down to 16/17 litres around town and some freeway driving to work.
My 80 is an auto so it probably chews a little bit more juice.
I am going to also go through all the electrical side as well to see if I can improve things a bit.
Thanks for all the advice.
Tall paul
Newcastle:truck:

[No Fn Idea]

Well I still haven't done anything to improve consumption yet but here are my pre fiddling consumption numbers

Petrol
450klms on 90L = 20L per 100klms

Gas
220klms on 66L = 30L per 100klms
300klms on 78L = 26L per 100klms

Seems pretty thirsty for me even though it is an 4.5L auto. My gas consumption is more than 120% of my petrol consumption so I think I have a general over consumption issue. And by the smell of it I may have a gas leak to chase down as well.

Ohhhh the joys

Cheers
Nick

[No Fn Idea]

The figures above for petrol are wrong. The more accurate (and reasonable) figures are below after today's fill up

440klms on 78L of 91RON = 17.75L per 100klms.

This is a much better figure and using this as a base it means that with gas I should be getting a figure about 20% more than that for LPG - this means I'm chasing just under 22L per 100klms for LPG. The best I've got so far is 26L per 100klms so I've got some work ahead of me trying to find improvements in gas consumption.

Cheers
Nick

[nate]

ok i know there a big car but also a big engine, are they quick? (not like a rocker) but do they get up and move? compared to a v6 jackaroo?

[No Fn Idea]

For what they are, they are quick. They keep up with the traffic and can get ahead of it but you'll need to not be too far away from a servo as they like a drink.

The figures I quoted above for mine were based on a 3200rpm limit and a 105 kph top speed.

I have overtaken in mine a few times on one lane each way roads and it does it pretty easy, but having said that I wouldn't be doing that on the same road on a decent hill, unless I could see for miles.

Cheers
Nick

[Big--K]

I have 94 1hz deisel "80" & i'm considering selling it to possibly buy a 4.5 petrol "80". My old girl gives me cosistantly 18-20 ltrs per 100. Doesn't seem to make a differance round town or highway. She does carry a lot of weight though [steele f & r & side bars , winch, r/rack, water tank, draws full of recovery & camping equipment, oh & a big bloke.]

If i hook on the camper or tow any extra kind of weight the figures go to approx 21-23 ltrs per 100.

My argument is that my diesel costs more to repair/service , diesel is more expensive to buy than unleaded & a 4.5 petrol goes a dam site quicker than my old oiler. Put the loaded camper on the back of my 80 ,hit the road & we are lucky if we get to 95 k's an hr let alone hit the tonne.

Any opinions or ideas would be much appreciated. I love my reliable old truck but i've got to start thinking about the dollars & cents of it all.
p.s. The whole feul system & vehicle have been looked over buy a qualified local mechanic & the above mentioned feul stats are as the car is now, they used to be worse.:cry:

[mudhog]

Mate i would put a turbo in and extracters that would give you a lot of power.

[Big--K]

Already has extractors & 2.5" custom exhaust. Unfortunately the old 1hz has done 360 000 klms of pretty hard yakka. Most of the information i've researched advises not to do aftermarket turbo kits on engines over 320-330k's.

[daisymabel]

G'day, I've got a 96 diesel with normal aspiration, and I fitted two Hiclones in the air system. I get 12L / 100, rural driving. 2"lift, no roof rack, and 265/75r16 tyres, I'm happy with that, but I've also got a 97 4.5 on dual fuel and I'm sticking the Hiclones in to see if it improves the 20/100 I get on gas.

[Big--K]

G'day, I've got a 96 diesel with normal aspiration, and I fitted two Hiclones in the air system. I get 12L / 100, rural driving. 2"lift, no roof rack, and 265/75r16 tyres, I'm happy with that, but I've also got a 97 4.5 on dual fuel and I'm sticking the Hiclones in to see if it improves the 20/100 I get on gas.


How does your 4.5 go on petrol & is it auto or man.

[slowlux]

G'day, I've got a 96 diesel with normal aspiration, and I fitted two Hiclones in the air system. I get 12L / 100, rural driving. 2"lift, no roof rack, and 265/75r16 tyres, I'm happy with that, but I've also got a 97 4.5 on dual fuel and I'm sticking the Hiclones in to see if it improves the 20/100 I get on gas.

you do realise those hyclone "fuel saver" or whatever they claim to do actually dont do anything at all, right?

in my 4.5 i seem to get around 300ish on petrol from a full tank and 300 from a full gas tank too! i have a feeling my oxygen sensor or whatever is probably screwed cause shou;ldnt i get a little bit more out of that much petrol?

[daisymabel]

You may be right, Mr slowlux, but my son in law fitted them to his 3.0 patrol, and noticed a definite improvement in performance, also a mate put them in his 60 series diesel and he also says they made a difference. As soon as I have worked out the consumption in my 4.5, I'll put them in and keep you posted. By the way I bet a bit over 400ks to a tank of gas, so it sounds like you may have a problem.

[Big--K]

Would be very interested in knowing your petrol consumption when you work it out.

[Oz Cruisin]

Hi all i've got a 4.5 on gas and i average about 250-300 per tank thats towing a 2 ton trailer around town.But personally cost affectivness LPG on these motors can be a real pocket biter.I personaly am taking the LPG off my 80 and throwing it to buggery.Nothing wrong with the system just dont like to continuing paying for damage the LPG does to the motor.Let alone trying to find a LPG tech that knows what they are doing and wont rip you off.
Oz

[slowlux]

You may be right, Mr slowlux, but my son in law fitted them to his 3.0 patrol, and noticed a definite improvement in performance, also a mate put them in his 60 series diesel and he also says they made a difference. As soon as I have worked out the consumption in my 4.5, I'll put them in and keep you posted. By the way I bet a bit over 400ks to a tank of gas, so it sounds like you may have a problem.

i'd be interested to hear the results, but i just dont see how a spinnning fan can inside your air intake or whatever can increase performance.

sounds like i do have a problem, wish i could get 400ks to gas, normally it gets around 250 if i floor it on the odd occasion. 300 is with driving it grandma x2 style

[No Fn Idea]

Howdy.

Just got some new LPG numbers. I got 408k out of 87l of LPG which equates to 21.32l/100k which is pretty good for an auto with 2" lift and standard size ATs. This was 70% hwy driving though

If I could guarantee the ULP would stay under $1.25 per litre I would dump my LPG too as the surging I get on it between 2000 and 3000rpm really sh!ts me

Cheers
Nick

[Novae]

Howdy.

Just got some new LPG numbers. I got 408k out of 87l of LPG which equates to 21.32l/100k which is pretty good for an auto with 2" lift and standard size ATs. This was 70% hwy driving though

If I could guarantee the ULP would stay under $1.25 per litre I would dump my LPG too as the surging I get on it between 2000 and 3000rpm really sh!ts me

Cheers
Nick

Damn it! I did almost 100% hwy driving last tank, and only got 280-something km's. Given that i'm running 35's with a larger rolling diamater that would make it just a touch over 300Kms of actual travel...for ~90L of gas :(

Obviously running the 35's, 4"(2+2) lift and roof-rack(empty) would have an effect on my comsumption but it still seems way high.

Even running my 31's i am lucky to get 300km's around town(country-type town mostly :P).

Although i rarely run petrol i don't think its actually much better than the LPG in terms of consumption. I was thinking wouldn't a dud O2 sensor only effect petrol consumption as it can't control the amount of fuel flow for the old-style systems?

Any idea's lads? After next general service(+a few new seals) this was the next thing to look into, so what's the go with improving consumption.

Would a dyno-tune do much for an 80? What about a larger(2.5") better breathing exhaust and extractors?

[daisymabel]

My missus had an EB falcon on dual fuel. It was converted at 80k, and had 32k when we traded. I only had the head of once to fix a water leak over the water pump, and put the head in to be checked. The valves were ok, and all he did was lap them and skim the head. The difference was she drove about 10klm before switching to gas each trip. We now have a 5L V8 fairlane on dual fuel and hoping to get similar mileage. By the way, Hiclone are just a system to swirl the air, thereby getting a better mix. Apparently, Mercedes are using a similar system in their cars.

[All-star]

I got a 1993 4.5L 80's Cruiser duel fuel with a 110L gas tank and I get 510km's to the tank.

[tallpaul]

It;s good to see that my original thread has got a lot of replies and advice.
We all strive to have good fuel consumtion, and power.
If you look into the thread on hyclones some swear by them, others say that they are a waste of money.
They seem to work on some vehicles but not others.
I was sent the following link on advancing the timing on the petrol cruiser.
http//www.lcool.org/technical/80series/timing.html.
Apparently Toyota does not condone the practice of advancing the timing as the factory settings are pretty conservative.
Have bought a timing light to play with the timing , and will monitor the fuel useage to see if the advice on the link pays off.
Happy 4 wheeling stay rubber side to the dirt.tall paul:truck:

[gtir300]

I did try the timing tweek and found i used a bit more fuel on ULP, when i tried PULP it appeared to make no difference. I have now set mine back to standard timing spec.

Its worth a go though, as it may work well on your engine :thumb:

[grimage]

After fitting extractors and a free flowing muffler on an 80 Series, with 31" AT's, 2" lift, front and rear bar work, I was about to achieve 430kms on 87 litres of gas. That was pretty much all highway, never exceeding 100kph. Normally though, I get about 23 litres per 100kms.

[Lorenz223]

Hi All,

I drive a petrol 80 series auto, I get about 20lt/100km for 50/50 around town/ highway driving. For straight highway driving unloaded about 15-16lt/100km. I have standard tyres and no lift.

I have just had my car fitted with LPG and it is one of the new direct injection systems. I'm really excited to see the results so once I've put a few tanks throught it I let you know how it goes.

[crankycruiser]

my 80 runs 4.8 gears, 38" tyres 9" lift.. im up the coast of tas atm.. which is windy rd and got 23lt to the hundred! stoked!!!!! oh and is 4.5 petty

[BA7500]

My car is running 35 Claws with 5" lift. Around town I get 25litre per 100km. If Idrive hard it can get up to 27. Considering trading to a diesel, its just way to thirsty.

[no eye deer]

I get about 20-25l/100km with 4" lift 33 muds and roofrack. I need to check and replace ignition components to see if I can improve this tho!

I would suggest checking all fuel connections from when you did the engine swap. Also check the oxygen sensor, these things do play havoc with fuel economy when they stuff up. Other things would be ensure the timing is set correctly. Silly but check the brakes arent dragging too.

Dunno if you get it down to the 12.5l/100 (thats an incredible figure, well done!) but the above should help.

I get the same, with the same stuff.
I get about 450KM out of a full tank(s) around town.
If I didnt love the car so much, I'd buy a Corrola.

Mark

Mark

[dales33]

ive got a 94 4.5 injected crusier, bog standard (one owner i just picked up for 8 grand :)
i just came back from mt Gambier to Geelong on one tank, plus some driving around.i did a trip from Nelson to Mt Gambier without the boat on the back to full up, so other than 36k i was towing a 12 foot tinnie with a 25 horse on the back, id hesitate to guess its around 350 to 400 kg with the crap i had in it.
i also had some camping gear and fishing gear (plus the mrs million kilos of to much stuff :P) in the back of the crusier.
so what i can gather from Romsey Australia Car fuel consumption Calculator (http://home.iprimus.com.au/foo7/fuel.html) i used 18.91 liters per k.
i was prolly averaging about 110kph most of the way home, and got a bit right foot happy behind the dingos in billy carts(my favorite peter brock qoute) in over taking lanes, maybe pressing it to 140 in bursts to overtake, so some of it was drinking hardcore juce.
ive also got a hole in the front muffler that the repair didnt last on on the way down.
could i get it any more efficient than this do you think, and what percentage of fuel consumption would the boat have added if you had to guess, Cheers Dale

[dales33]

that fuel consumption was based on 505 k's traveled for what i asume is a 95 liter tank?

[boklux]

I know this is a fuel thread but since a lot of you blokes have gas/ dual fuel you might be able to help. I just put dual batteries in my 80 and had to move the windscreen washer bottle and dont know where to put it. the piranha kit came with a bracket to mount it but the gas doohickey is in the way. Any ideas or did anyone come up with an easy fix? Any ideas appreciated.
Thanks

[bloke76]

4.5 petrol dual fuel 100s (33's roof rack and 2 inch lift plus a couple other things)

unleaded 20-25L/100
LPG 25-30L/100

LPG too expensive in cairns..

solt it and bought a turbo deisel hilux...11-12L/100.. problem solved...

[burbling 60]

mate i was getting sh11ty economy on gas pulling a heavy trailer - struggling to get 200km out of 85l and they pulled the mixer apart at a gas place - reboofed that and a new o2 sensor - straight to 310 pulling a heavy trailer

thats on a 60 with a holden v8 - but i reckon the principle is the same - the mixer was full of oil and crap


on another note - the gas guy suggested that if i go offroad for a long period (where i dont use the gas at all - i keep it for a reserve tank) i should pull the mixer off altogether as it restricts the airflow something shocking - i was thinking of getting a bypass fabbed up so when its on petrol it bypasses the gas mixer so the motor is getting a full 3" of air and not the restricted airflow through the mixer

any thoughts on this



good thread btw