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Bad fuel consumption

Tiny
WYNAND
  • MEMBER
  • 2001 TOYOTA TAZZ
  • 200,000 MILES
Bad fuel consumption tazz 1300 carburetor I am getting about 450km out of a full tank 55 liter full service recently done Please advice if the mileage is bad
Tuesday, March 26th, 2013 AT 12:36 PM

11 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
A few things could cause this.... improper choke adjustment, oxygen sensor, dirty fuel circuits inside the carb. You may want to scan it to see if it has stored any codes that may give us a direction to begin

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please run down this guide and report back
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Tuesday, March 26th, 2013 AT 2:50 PM
Tiny
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I mostly drive 80/100 and mostly shift from 4th to 5th gear because I mostly drive open road
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Tuesday, March 26th, 2013 AT 2:54 PM
Tiny
KHLOW2008
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For such driving conditions, the mileage seems poor, getting less than 10 km per liter.

Do the spark plugs indicate good combustion or engine is running rich?
Is it manual or automatic transmission and do you have performance issues?
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Tuesday, March 26th, 2013 AT 3:00 PM
Tiny
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Manual transmission
the car sometimes hold back/spoking alot
When I go up a hill it will hold back in second gear and shuddenly release when I am on top of the incline
the colour on the spark plugs is more black ten grey.I would say it is dark brown
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Tuesday, March 26th, 2013 AT 3:16 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Light brown is good, Dark brown means slightly rich.

The hesitation seems to be the cause of the problem. Carburettor might require servicing
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Tuesday, March 26th, 2013 AT 3:24 PM
Tiny
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I have clean it because I also thought that was the issue
I forget to mention that the idle is also a bid rough
I was thinking it might be the mixture settings on the carb
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Tuesday, March 26th, 2013 AT 3:28 PM
Tiny
KHLOW2008
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How did you clean the carburettor?
Was it tuned correctly? A CO meter would be required for accurate adjustments.
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Tuesday, March 26th, 2013 AT 3:32 PM
Tiny
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  • 13 POSTS
Turns out it was the MAP sensor. Replaced it and she's running great again, only cost me about $50.00
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Tuesday, March 26th, 2013 AT 3:40 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Were glad you got it figured out. In the future keep in mind Carb cleaner is only for cleaning the throttle barrel and not the internal circuits. You should try adjusting the CO and see if it helps.
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Tuesday, March 26th, 2013 AT 3:58 PM
Tiny
MABASATC
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  • 1 POST
Hi,

Where is the MAP sensor on the Toyota Tazz?
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Wednesday, June 15th, 2022 AT 12:31 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,536 POSTS
Here is the location of the MAP sensor in the diagrams below. Check out the diagrams (below). Please let us know if you need anything else to get the problem fixed.
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Friday, June 17th, 2022 AT 12:09 PM

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