FJ62 Fuel Economy

Submitted: Tuesday, Jun 13, 2006 at 08:56
ThreadID: 34881 Views:7146 Replies:7 FollowUps:4
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Hey Guys.

Im getting horrible fuel economy outta my FJ62, poor old girl!

I also have a split in my air intake pipe/hose, could this be the problem?

I also have been told i need a carbi overhaul :-S (not happy bout hearing that)

Any ideas guys?

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Reply By: 3F62 - Tuesday, Jun 13, 2006 at 12:52

Tuesday, Jun 13, 2006 at 12:52
How horrible ????
AnswerID: 178249

Reply By: Moser - Tuesday, Jun 13, 2006 at 13:19

Tuesday, Jun 13, 2006 at 13:19
Gday

What is your milage you are getting, 62's are well known as fuel guzzlers, I know mine was. glad it was on gas as well,

I did get a carby overhaul done not long before I sold the girl. I can tell you the increased performance I got was unbeleivable, it was a well spent 300 bucks as far as I was concerned,

Moser
AnswerID: 178252

Reply By: cipher - Tuesday, Jun 13, 2006 at 22:20

Tuesday, Jun 13, 2006 at 22:20
hi guys ok basically i just got the standard Petrol tank 50L

I get about 150-180KM out of an entire petrol tank 50L

With Gas i get about 240KM out of a 86L tank

Too me coming from a sedan that does not seem normal

:>>>>?????
AnswerID: 178358

Follow Up By: Muzzgit (WA) - Tuesday, Jun 13, 2006 at 23:42

Tuesday, Jun 13, 2006 at 23:42
Fuel tank on an FJ62 is about 90L, unless the LPG tank is underneath and the main fuel tank has been removed.

At any rate your fuel use is way way way too much. I used to get nearly 400 klm out of 70L of gas and well over 500 klm out a tank of petrol.
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FollowupID: 434540

Reply By: cipher - Wednesday, Jun 14, 2006 at 05:59

Wednesday, Jun 14, 2006 at 05:59
yeah i have an 86L gas tank underneath the car in the spare wheel carrier..

Any ideas how i can restore the fuel economy to its original state? Its getting to the stage where if i go out 4WDing for a day, i have to get outta the bush and fill up and go back in.. costs around 150 for a day, its a joke..
AnswerID: 178376

Reply By: HJ60-2H - Wednesday, Jun 14, 2006 at 12:03

Wednesday, Jun 14, 2006 at 12:03
New plugs & check the gap
New points & set the gap
Check/set the timing on the distributor
Set the mixture & idle on the carbie. May need a jet clean as well.
AnswerID: 178413

Follow Up By: cipher - Wednesday, Jun 14, 2006 at 16:25

Wednesday, Jun 14, 2006 at 16:25
Thanks HJ60

I have myself put in new leads and plugs... Ive put on a new Disy cap and rotor, only thing left is points, timing, mixture, jet clean.

I have adjusted it to idle on gas at 650rpm as that is what is stated on engine plate.
What is a jet clean? isnt that for injectors?
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FollowupID: 434662

Reply By: HJ60-2H - Wednesday, Jun 14, 2006 at 18:36

Wednesday, Jun 14, 2006 at 18:36
A carby has a jet (al least one) that the fuel is squirted out of. If the jet is blocked then the spray pattern and amount of fuel etc is wrong. Same principle as in a fuel injector, he both have a hole that they squirt the required amount of fuel out of. If you start playing wiht the jets then you may as well overhaul the carbie.

I am assuming it is a 3F pertol motor with an origional Toyota carbie? Many of these 3F's had the carbies replaced with Holleys I think. The Holley on my 2F was a mongrel as it would flood and stall the motor on a hill climb etc hence climbing rock steps was a real problem. I woudl get a reliable 420KM from 80 litres of regular unleaded out of my 2F powered FJ40.
AnswerID: 178477

Follow Up By: cipher - Wednesday, Jun 14, 2006 at 22:10

Wednesday, Jun 14, 2006 at 22:10
thanks HJ60, but if there were a problem with the carbi that wouldnt effect both Gas and Fuel??? true?

Even my gas is horrible mileage.. I actually think its getting worse too... At half a tank of gas now and have only done 80KM... so 43L for 80KM

What could/would be causing horrible milleage on both?

I am so tempted to chuck a new engine in this stupid thing. Its a joke
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FollowupID: 434735

Follow Up By: HJ60-2H - Thursday, Jun 15, 2006 at 06:09

Thursday, Jun 15, 2006 at 06:09
If you fit a replacement engine then the poionts, timing and carbie are sure to be tuned/set up etc properly. So I guess this is one way of doing this.

Personally I'd do the tuning on the existing engine and see how it goes. Its anly an hour to do it, maybe less. These are basic engines and will run forever. As they age they start to use a bit of oil and lose some compression but are unlikely to actually fail. (Someone will now tell me of how their 3F blew up last week, this forum is like that).

With such bad fuel consumption the other thing I'd look for is a fuel leak. Had this in a V6 Commodore. You could smell it when the engine was running.

Good luck
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FollowupID: 434760

Reply By: Muzzgit (WA) - Thursday, Jun 15, 2006 at 00:24

Thursday, Jun 15, 2006 at 00:24
Guages on LPG tanks are as accurate as a blind man with a shotgun. When your LPG guage says half, you probably have more than three quarters. My FJ62 would go for more than 80klm with the guage on empty. The only way I could accurately tell was too keep an eye on the odometer and I would average 380klm (metro driving) to one full tank.

I would not recommend fitting a holley carby, stick with the standard one, just get it checked out & make sure the car is tuned properly
AnswerID: 178541

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