• Advertisement

Fuel Economy?

Getting the best performance from your Isuzu, the in's and out's

Fuel Economy?

Postby codynapper » Mon Nov 13, 2017 5:50 pm

Hi all,

Recently my wizard has started using an absoluteb bucket load of fuel around 350-400 from a tank, ive had the entire thing serviced and im still using a buckket load of fuel, is there anything else i could look at to save just abit of fuel?
codynapper
Isuzu Baby
 
Posts: 4
Joined: Fri Oct 20, 2017 12:09 pm
Age: 20
Country: New Zealand
City: Auckland
Vehicle: 1998 Isuzu Wizard

Re: Fuel Economy?

Postby isuzurob » Mon Nov 13, 2017 6:03 pm

What sort of engine do you have?
isuzurob
Global Moderator
 
Posts: 1775
Joined: Mon Jun 07, 2010 6:12 pm
Age: 25
Country: New Zealand
City: Taupo
Vehicle: 1990 Isuzu Bighorn 2.8t/d, 3" extended shackles, 2" body lift, 33" silverstone extreme tyres, Front+rear bars, winch with 40m dyneex rope, 21/2 inch exhaust, lokka's front+rear, custom turbo, emissions removed, injector pump modified and more

Re: Fuel Economy?

Postby geeves » Mon Nov 13, 2017 6:47 pm

How many litres to that 300km? If the fuel guge sender fails it shows empty very early.
What engine Im guessing 4jx1
what sort of driving?
Is it still performing ok?
Any smell of diesel under the bonnet?
Sanding your knuckles before starting work can help. That way you cant skin them
User avatar
geeves
Site Admin
 
Posts: 8962
Joined: Sun May 10, 2009 1:36 pm
Location: Rangiora
Age: 63
Country: NZ
City: Rangiora
Vehicle: 94 bighorn 4jg2
2013 Subaru XV

Re: Fuel Economy?

Postby rabidrabbit001 » Tue Nov 21, 2017 10:12 am

4jg1t conversion USA 1999 trooper mua5
8.25l/100k. 28.5 mpg respectively
rabidrabbit001
Isuzu Baby
 
Posts: 44
Joined: Fri Sep 12, 2014 10:54 am
Age: 40
Country: United States
City: Monument
Vehicle: 1999 Trooper converted to 4JG1T, 2000 Trooper AR5 and TOD to AR5 conversion.

Re: Fuel Economy?

Postby geeves » Tue Nov 21, 2017 12:46 pm

Did you ever dyno that conversion? It would be interesting to know how it compared to the 4jb1 and 4jg2 engines
Sanding your knuckles before starting work can help. That way you cant skin them
User avatar
geeves
Site Admin
 
Posts: 8962
Joined: Sun May 10, 2009 1:36 pm
Location: Rangiora
Age: 63
Country: NZ
City: Rangiora
Vehicle: 94 bighorn 4jg2
2013 Subaru XV

Re: Fuel Economy?

Postby mudslinger » Tue Nov 21, 2017 5:34 pm

my efi auto 4gj2 is really thirsty too i put 55 litres from fuel light and got 317km back to fuel light. why would it be so thirsty?
mudslinger
Isuzu Master
 
Posts: 297
Joined: Thu May 21, 2009 5:07 pm
Location: chch
Age: 25
Country: NZ
City: CHCH
Vehicle: 91 mu 2.8TD manual

Re: Fuel Economy?

Postby geeves » Tue Nov 21, 2017 6:54 pm

Is that cruising the motorway or negotiating Christchurch rush hour?
Sanding your knuckles before starting work can help. That way you cant skin them
User avatar
geeves
Site Admin
 
Posts: 8962
Joined: Sun May 10, 2009 1:36 pm
Location: Rangiora
Age: 63
Country: NZ
City: Rangiora
Vehicle: 94 bighorn 4jg2
2013 Subaru XV

Re: Fuel Economy?

Postby mudslinger » Wed Nov 22, 2017 5:18 pm

cruising open road,2 hour stint crawling a river bed then open road for the rest of weekend. put $40 diesel in@1.49.9 per litre and so far done 130km and almost back on fuel light
mudslinger
Isuzu Master
 
Posts: 297
Joined: Thu May 21, 2009 5:07 pm
Location: chch
Age: 25
Country: NZ
City: CHCH
Vehicle: 91 mu 2.8TD manual

Re: Fuel Economy?

Postby geeves » Thu Nov 23, 2017 5:05 am

Ive seen the fuel guage on the old bighorn move through a quarter in a 30km in 30 minute drive and that could achieve 8.3l/100k cruising. Off road really eats fuel
Also consider bigger tyres eat fuel plus the bigger diameter means adding distance to the reading.
Sanding your knuckles before starting work can help. That way you cant skin them
User avatar
geeves
Site Admin
 
Posts: 8962
Joined: Sun May 10, 2009 1:36 pm
Location: Rangiora
Age: 63
Country: NZ
City: Rangiora
Vehicle: 94 bighorn 4jg2
2013 Subaru XV

Re: Fuel Economy?

Postby mudslinger » Thu Nov 23, 2017 2:17 pm

only have 265/70/16 a/t's on it so only next size up from factory
mudslinger
Isuzu Master
 
Posts: 297
Joined: Thu May 21, 2009 5:07 pm
Location: chch
Age: 25
Country: NZ
City: CHCH
Vehicle: 91 mu 2.8TD manual

Re: Fuel Economy?

Postby tonkamu » Sun Nov 26, 2017 8:13 am

adding distance to the speedo? isn't it the other way around because its larger wheels. my speedo reads 90kph with 33 inch wheels but im actually doing about 100kph and about 42kph is 50kph. So wouldn't that mean per real kilometre the speedo only clocked up 900 meters etc. or do I have the wrong end of the stick here lol
tonkamu
Isuzu Senior
 
Posts: 156
Joined: Sun Jan 01, 2017 7:23 am
Age: 36
Country: NZ
City: Auckland
Vehicle: 2.8 Mu 1991 All Black. MODS - Rear Lifted 2.5" Lovells Leafs / Rear Auto Locker / LSD in front / 33x12.5x15 MT Achilles / 9500 RUNVA w plug n kills switch inside cab / EGT, Voltage, Turbo timer, Boost gauge / 20 PSI VF10 Turbo with VF10 exhaust housing 2.5" downpipe with merged 2" wastegate pipe to full 2.5" straight pipe / GFB Boost Tap / Maxed fuel with grinded down cable stop / Adjusted Boost Compensator / 3.1 Oil Cooler / Intercooled / 3" Custom intake to sealed K&N airbox & filter to Snorkel / Catch Can / Xtreme Outback HD clutch / 80 amp alt / RockfordFosgate 300rms AMP w 2X Rockford Power 6x9's BT HDeck / all EGR, QWS, AC pump deleted.

Re: Fuel Economy?

Postby isuzurob » Sun Nov 26, 2017 12:12 pm

All depends on engine setups etc and driving styles, best i think my 4jb1t does is 300 to 400km to a tank and thats 75 litres, diesel still cheaper than 1 litre of water at the servo
isuzurob
Global Moderator
 
Posts: 1775
Joined: Mon Jun 07, 2010 6:12 pm
Age: 25
Country: New Zealand
City: Taupo
Vehicle: 1990 Isuzu Bighorn 2.8t/d, 3" extended shackles, 2" body lift, 33" silverstone extreme tyres, Front+rear bars, winch with 40m dyneex rope, 21/2 inch exhaust, lokka's front+rear, custom turbo, emissions removed, injector pump modified and more

Re: Fuel Economy?

Postby geeves » Sun Nov 26, 2017 2:55 pm

Driven nicely I have driven from Wellington to Rotorua then back to Hunterville on a tankful. This was in the 89 LWB Bighorn with 4 in the car 31 inch tyres and weather that dictated a careful drive. Thats a shade over 800km and the refill was 72 litres. I could of got to Bulls maybe even Levin. Play in soft sand for a day though and 200km is optimistic.
Sanding your knuckles before starting work can help. That way you cant skin them
User avatar
geeves
Site Admin
 
Posts: 8962
Joined: Sun May 10, 2009 1:36 pm
Location: Rangiora
Age: 63
Country: NZ
City: Rangiora
Vehicle: 94 bighorn 4jg2
2013 Subaru XV


Return to Engines and Exhaust

Who is online

Users browsing this forum: No registered users and 12 guests