i have recently just brought a 96 sierra soft top and i have notice my fuel usage is unbelivable fill up 30 litres and i only get 200 kms ??? is this normal or is this a common problem ???
-changed plugs
- put some carby cleaner in and its still using heaps of juice!!

IDEAS MUCH NEEDED AS I AM AN APPRENTICE WITH VERY LITTLE COIN.

Yeah 2 inch lift
Big tires
Do I test if brakes are dragging ?

Yeah 2 inch lift
Big tires
Do I test if brakes are dragging ?

Looks like choke spring retainer has fucked off any ideas where to get a new one ?

Yeah 2 inch lift
Big tires
Do I test if brakes are dragging ?

Looks like choke spring retainer has fucked off any ideas where to get a new one ?

What size? Have you corrected your odometer due to the increase in tire size? Have you altered your gearing to cope with the tires?

Url mate ?

Odometer correction calculation is simple. It is just (new tire diameter/stock tire diameter) x odometer reading. For example if your tires were 30".

30/26 * 200 = 230 actual km eg

She is a coily how much do leafy tranfers cost ? Would this explain why I cant go into 4 L????

What size tires do you have?

235/75R15, is what is on the tire so 35 s? I really have no clue has they were on the car when I brought it.

No no no.
A 235/75 is 3 sizes larger than a standard 205/70.

It works out to about 29.5" tall, nowhere near 35".

A set of 4.16 or 4.9 reduction gears will be what you need.

Lift increases wind resistance hence higher fuel consumption.
Big tyres ruin gearing and increase fuel consumption.
Jack up one wheel at a time and see if they spin freely.




Good find!
Wire it open until you find a replacement spring.

I have a parts carby listed on Ebay for $25.

A leafy transfer costs anywhere from free to $250 typically. No that wouldn't explain why you can't get into 4L. Maybe the transfer is a little 'tight'.

As for tyres, example if your tyres were 30"

30L in 230km is only 13km/100L. A stock coily uses about 10L/100km and when running well my coily on 31s without gears with a 1.6 would use 12L/100km so 13L/100km isn't too bad depending on how it is driven.

IMO address your lack of gearing if need be and you will see a benefit.

Joshua02, it sounds as if you haven't owned the car very long. IMO also do all the regular maintenance checks. Dead wheel bearings and dragging brake calipers as stated earlier will sap power and cost fuel. Replace all ignition components (leads, dissy cap, rotor), chek timing, change all your oils (including gear oils), run 98 RON fuel etc.

Wire or zip clip the choke so the flap stays open.

There are no adjustments possible for your transfer.
Something is seized or worn out.

Try http://www.lowrangeoffroad.com for gears.
Put a wanted ad on here for a WT transfer with jackshaft and brackets.

Fix the carby first.

Lift increases wind resistance hence higher fuel consumption.
Big tyres ruin gearing and increase fuel consumption.
Jack up one wheel at a time and see if they spin freely.
.

Wont opening the choke fully use more fuel

My fuel consumption was reduced when i fitted bigger tyres, quite considerably.
got home from sydney on abit over half a tank, about 350k

Given the limited info in the above:
Unless you drive a stock Sierra with a G16B I find that economy improved "quite considerably" with larger tyres fitted hard to believe considering the average Sierra is lucky to get more than 350km to a tank and you claim double that.
Best I've EVER gotten out of a Sierra is 8.5litres per 100km or 470km on 40 litres.That car has a G16B and 30" tyres.