My Isuzu is very heavy on fuel, 7.5km/L. What can the problem be and What can I do about it?
Jun 26, 2008 at 8:33 PM
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KHLOW2008
✓Experienced Mechanic
41,814 POSTS
Hi JOHAN111,
Fuel consumption is very subjective, it varies with driving condition.
Possible causes.
1. Engine out of tune, ie ignition timing, crank and cam out of sync, idling speed too high.
2. Clogged fuel filter, air filter.
3. Faulty sesnors.
4. Thermostat stuck open.
5. Dragging brakes,
6. Slipping clutch.
Jun 28, 2008 at 4:41 AM
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