High fuel consumption

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
If it is running rich, then you may have a partially clogged CAT.

Remove CAT (most Toyota's are bolt on) and inspect.

Also clean MAF.
Was this
answer
helpful?
Yes
No
Saturday, May 30th, 2020 AT 11:32 AM (Merged)
Tiny
GREG74
  • MEMBER
  • 2 POSTS
Thanks for the info. Being a novice can you explain CAT & MAF.
Was this
answer
helpful?
Yes
No
Saturday, May 30th, 2020 AT 11:32 AM (Merged)
Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
CAT is the convertor in the exhaust. MAF is Mass Air Flow sensor before throttle body. It measures the volume of air entering engine.
Was this
answer
helpful?
Yes
No
Saturday, May 30th, 2020 AT 11:32 AM (Merged)
Tiny
6GUNN
  • MEMBER
  • 44 POSTS
  • 1997 TOYOTA RAV4
  • 2.0L
  • 4 CYL
  • AWD
  • AUTOMATIC
  • 210,000 MILES
This '97 Rav4 gets the worst gas mileage I've ever seen. It's getting around 130-150 miles per tank. That's driving very carefully, no fast stops or starts, keeping speeds 60 and under. At highway speeds you can see the gas gauge move downward.
It has no codes set. And the plugs, distributor cap, rotor, and plug wires are fairly new. All the normal things like tire air pressure has been checked.
This car has had the engine and transmission removed a couple of times because of trans issues. So it's possible that the vacuum lines have been reconnected wrong, if that is a possible cause of the poor mileage.
The engine starts and runs fine, it just drinks gas like a car with a 12 cylinder engine.
A check of the timing shows it's off by a couple degrees, but the timing can not be adjusted on this engine.
Thanks for any help you can give me.
Was this
answer
helpful?
Yes
No
Saturday, May 30th, 2020 AT 11:32 AM (Merged)
Tiny
6GUNN
  • MEMBER
  • 44 POSTS
So would a donation help get this question answered? I could use some help, I'll give what I can.
Was this
answer
helpful?
Yes
No
Saturday, May 30th, 2020 AT 11:32 AM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Have the timing belt checked. Ensure it has not jumped a tooth.
Was this
answer
helpful?
Yes
No
Saturday, May 30th, 2020 AT 11:32 AM (Merged)

Please login or register to post a reply.

Sponsored links