NewStats: 3,264,924 , 8,185,101 topics. Date: Thursday, 12 June 2025 at 07:47 PM 6q5b55

6382y

Matrix 2003 Fuel Consumption - Car Talk - Nairaland 3f5f

Matrix 2003 Fuel Consumption (818 Views)

(4)

(1) (Go Down)

theadeola: 9:54am On Nov 01, 2024
Hello house. My 2003 Matrix has P0450 and P0451 codes. I scanned after I noticed that my fuel consumption is 12-13 MPG, when it should be around 21-22MGP. I've checked live data for my car, oxygen sensors are fine, ignition timing is within spec, MAF is fine, basically all the sensors surrounding fuel consumption are fine. My fans are factory setting and my thermostat is present.

I don't know what else to check, as I'm not sure these two codes can be responsible for such a difference in MPG. Please any help will be appreciated.
bacco2000(m): 8:02pm On Nov 01, 2024
I am also facing the same issue with a nigeria used 2005 matrix i just got.

The MPG is around 16mpg against 25MPG
temizeee(m): 10:32pm On Nov 01, 2024
If you have obd 2 scanner you can check the short term and long term fuel trims see the % percentage to see what it looks like, also a leaking fuel injector and very high fuel pressure to the rail may not trigger any code on your scanner all these have to be look into….
temizeee(m): 10:34pm On Nov 01, 2024
You can change the fuel tank cap too see if it clear the code
theadeola: 10:40pm On Nov 01, 2024
temizeee:
If you have obd 2 scanner you can check the short term and long term fuel trims see the % percentage to see what it looks like, also a leaking fuel injector and very high fuel pressure to the rail may not trigger any code on your scanner all these have to be look into….


oh, thank you. I will check the fuel trims, must have skipped my mind to check them. The high fuel pressure, do you have any idea of how to check that?

As for a leaking fuel injector, the pulse width of my injectors at idle is usually 2.4,2.5, which is within spec. Can an injector still be leaking with such a good pulse width?
theadeola: 10:42pm On Nov 01, 2024
bacco2000:
I am also facing the same issue with a nigeria used 2005 matrix i just got.

The MPG is around 16mpg against 25MPG

If you're in Ibadan and not too far from Orita axis, I can scan for you and check the live data, yours might have more info as to what might be the problem.
theadeola: 10:42pm On Nov 01, 2024
temizeee:
You can change the fuel tank cap too see if it clear the code

okay, will do this. Thanks for the suggestion.
sultaan(m): 1:42am On Nov 02, 2024
NNPC fuel evaporates like ethanol

4 Likes

bacco2000(m): 5:29am On Nov 02, 2024
I'm in Lagos, i bought a scanner because of this.

theadeola:


If you're in Ibadan and not too far from Orita axis, I can scan for you and check the live data, yours might have more info as to what might be the problem.

Bola4boy(m): 4:28pm On Nov 02, 2024
bacco2000:
I'm in Lagos, i bought a scanner because of this.

I stay at around akala express boss. Pls drop your number so I can do a comprehensive scan. Although I have this obd scanner.
bacco2000(m): 6:07pm On Nov 02, 2024
08137822156 is my phone number.

I'm in Lagos.

I'm planning to come to Ibadan before month end.


Bola4boy:
I stay at around akala express boss. Pls drop your number so I can do a comprehensive scan. Although I have this obd scanner.
Bola4boy(m): 7:01pm On Nov 02, 2024
theadeola:


If you're in Ibadan and not too far from Orita axis, I can scan for you and check the live data, yours might have more info as to what might be the problem.
I'm around akala express in ibadan, I will visit you for scanning. Pls drop your number
theadeola: 8:09pm On Nov 02, 2024
Bola4boy:
I'm around akala express in ibadan, I will visit you for scanning. Pls drop your number

08154616455.
theadeola: 8:12pm On Nov 02, 2024
Scanned my car today again, my long term fuel trim is -1.594%. I don't think this is the problem, as it is still within recommended limits. My short term fuel trim ranges from 1.something to 5.something, which is also still normal.

Checking fuel pressure at the rail is my next step.

1 Like

Elsueno: 3:24pm On Nov 04, 2024
Have U tried buying fuel at different stations. It seems like current fuel freaking burns like kilode!

I even thought it was my ca, till I tried a few different stations & that's when I figured most of d fuel currently na just to manage till U lucky get a bit of good one

4 Likes

Nomerci: 10:51pm On Nov 04, 2024
..
fineboynl(m): 7:19am On Nov 05, 2024
Old and worn out nigerian used engine cannot get factory recommend MPG. Especially Nigerian badly used engine. Its simple because of loose of compression.

One last thing you can try is to pour 1k tyna on a slightly above half tank.

Your plugs should be dry brown if your engine is burning fuel correctly.

1 Like

fait10(m): 8:07pm On Nov 05, 2024
The fuel in nigeria now burns faster, this country called Nigeria very strange

1 Like

temizeee(m): 4:04am On Nov 06, 2024
fait10:
The fuel in nigeria now burns faster, this country called Nigeria very strange

Dangote fuel

(1) (Reply)

Is D Sign Normal??

(Go Up)

Sections: How To . 17
Disclaimer: Every Nairaland member is solely responsible for anything that he/she posts or s on Nairaland.