1998 Other Toyota Models Decreased fuel mileage

1998 TOYOTA
300,000 MILES • 6 CYL • 4WD • MANUAL
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MITCHELLFARMS
  • MEMBER
  • 1 POST
My '98 toyota Tacoma 4X4 has started consuming twice it's usual gas this summer yet it runs fine. I changed the fuel & air filters, spark plugs, spark plug wires. The garage says my oxygen sensors are fine. Toyota can't analyse it since no warning light comes on. They said that changing the timing belt MIGHT do something but that's a lot of work and $ to do on spec.

Any suggestions as to what I should try next? It's using almost double the amount of fuel it uses in winter.

Thanks
Aug 10, 2008 at 10:19 AM
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KHLOW2008
  • ✓ASE Certified Mechanic
  • 41,814 POSTS
  • ASE Certified Mechanic
Hi mitchellfarms,

I would check
1. iding speed.
2. ignition timing.
3. fuel leakages.
4. binding brakes
5. slipping clutch disc.
Aug 20, 2008 at 7:56 AM
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