What could be the problem? (carb engine / high gas consumption)

[batusai_jr]

My car is a Toyota Corolla XE 95. I had it overhauled, tuned up, replaced timing belt, replaced the motor in the radiator, modified the carb with a brand new 4k carb, replaced all stuffs with regards to "kalampag", had done everything i know with regards to fuel consumption to save gas, yet it still consumes alot... city driving is 6.5-8km per liter, long drives 7.5-8.5km at the most...

i really am having problems with it... most cars of the same model consumes atleast 10-14km per liter after having read most forums here and other sites... what could be the problem?

Most friends and mechanics i ask suggested to have the carb's jet adjusted to smaller one... but it will sacrifice something, that is, yung hatak daw... but what i am trying to understand is that, why other cars of the same model, even the taxi is fuel efficient than mine? they haven't adjusted their jets yet.. thats what my friends say, some with 2e carb and others with 4k carb... help!!!

[desert fox]

baka naman sa way of driving mo bro?

[ghosthunter]

How about potential source of "friction" and others?

Dragging brakes?
Wheel alignment?
Wheel bearings?
Does the ac compressor & alternator turn easily?
Are the engine drive belts NOT over tightened?
Is the timing correct and NOT too advanced?

[batusai_jr]

baka naman sa way of driving mo bro?

i short shift most of the time and i dont rush, i leave early cause i drive slower that in my college days cause i want to save more fuel, i dont even reach 80kph on my daily route, i gave up being a road hog along time ago... it can also be my way of driving, can you suggest more so i can try it?

How about potential source of "friction" and others?

Dragging brakes?
Wheel alignment?
Wheel bearings?
Does the ac compressor & alternator turn easily?
Are the engine drive belts NOT over tightened?
Is the timing correct and NOT too advanced?

Brakes - had it checked also
wheel alignment- had it checked too
bearings - had it replaced including the rack and pinion i think thats what it is called and everything that attached to it including the rubber thing, ball joints, and i guess a shock absorber
AC and alternator - i had it adjusted to the very minimal, correct me if i am wrong - the gauge does not reach number 1 when it is idle with and w/o aircon...
timing - (if this is the one concerning timing belts etc) i had it corrected, replaced the belts just before i had it overhauled...

i am really having problems- i had spend that much i can buy another car of the same model (but an ex taxi)

[desert fox]

ganyan talaga bro kapag carb....bago umalis, wag ka na masyadong magpainit ng sasakyan.after 5 seconds, sibat na pero wag naman high acceleration....usual lang ba...iwas sa extra load sa compartment.

check mo air filter mo bro, baka low class,o baka madumi.

baka di ok ang timpla ng air-gas mo....baka more on gas,less air...

sa driving, the higher the number na nagshift ka ng gear,less ang gas na maconsume mo....yan e kung di ka galit sa silinyador....

check your tire pressure too.....

[bambino]

ano ang base idle mo, and is it A/T or M/T ?

[batusai_jr]

ano ang base idle mo, and is it A/T or M/T ?

base idle? you mean yung sa gauge on gas? i think it aroung 0.5-0.7... M/T. saka hindi na rin ako nagpapainit masyado ng makina... usually atleast a minute for oil to cover everything lang.

[sirkosero]

My car is a Toyota Corolla XE 95. I had it overhauled, tuned up, replaced timing belt, replaced the motor in the radiator, modified the carb with a brand new 4k carb, replaced all stuffs with regards to "kalampag", had done everything i know with regards to fuel consumption to save gas, yet it still consumes alot... city driving is 6.5-8km per liter, long drives 7.5-8.5km at the most...

i really am having problems with it... most cars of the same model consumes atleast 10-14km per liter after having read most forums here and other sites... what could be the problem?

Most friends and mechanics i ask suggested to have the carb's jet adjusted to smaller one... but it will sacrifice something, that is, yung hatak daw... but what i am trying to understand is that, why other cars of the same model, even the taxi is fuel efficient than mine? they haven't adjusted their jets yet.. thats what my friends say, some with 2e carb and others with 4k carb... help!!!

Woah! 10-14Km per liter? I drive a vios and am only getting about 11km per liter city drivinf.

[pearljam]

Try mo mag modify ng air filter... try mo yung cone types na filter. It give better air flow sa carbs. How about yung menor mo? Baka naman masyadong mataas?

[kikoteng]

Hi.

Also drive a corolla M/T carb type.

Had a similar problem lately with high FC.

Things I did (not in sequence) :
1. Fuel line cleaning
2. Cleaned spark plugs
3. Cleaned carbs
4. Changed air filter (biggest effect)
5. Changed fuel filter

FC went from 8.5 kpl to 10 kpl. Idle improved drastically as well especially when engine is cold.


Kiko

[batusai_jr]

You can Isolate the cause your problems 1 by one, you can start with air conditioning system. Try traveling your normal route with air con off the whole time, if you reach at least 9-10 km per liter then your cooling system's thermostat might be at fault. You may try this then post the results so we cab help you further.

Sir i have tried driving it with aircon off, but no difference it consumption...

Try mo mag modify ng air filter... try mo yung cone types na filter. It give better air flow sa carbs. How about yung menor mo? Baka naman masyadong mataas?

This i got to try, i'll modify the air filter, i changed carb kasi from 2e to 4k. the mechanic told me it would be more efficient than before because 4k is smaller, but from what i have noticed is that some tube has been blocked because 4k has lesser holes for air i think?

Hi.

Also drive a corolla M/T carb type.

Had a similar problem lately with high FC.

Things I did (not in sequence) :
1. Fuel line cleaning
2. Cleaned spark plugs
3. Cleaned carbs
4. Changed air filter (biggest effect)
5. Changed fuel filter

FC went from 8.5 kpl to 10 kpl. Idle improved drastically as well especially when engine is cold.


Kiko

1. Ano yung fuel line cleaning? can i do this on my own o dapat pagawa ko sa mekaniko?
2.newly change - 2-3mos palang spark plugs
3.New carb modified 2e to 4k
4.New air filter 2-3mos
5.New fuel filter

i changed almost everything about 2-3mos ago coz i got it overhauled,

I will try changing air filters to make it take more air...

I have another question...

Spark plugs tell us if fuel / air intake are balanced right?

Can i check it on my own? is it similar to a motorcycle? I own one too and i check the spark plugs color, brown is the good one right? baka kasi pag tinanggal ko hindi ko na maibalik... and should i remove all spark plugs or only one can tell me what i want to know?

[kikoteng]

>> 1. Ano yung fuel line cleaning? can i do this on my own o dapat pagawa ko sa mekaniko?

additive that you place into your gas tank. Basically, it cleans as you drive. In my case, my FC went down by about 0.5 km/l. For me, it is not drastic so it might or might not have an effect in your case.




>> Spark plugs tell us if fuel / air intake are balanced right?

>> Can i check it on my own? is it similar to a motorcycle? I own one too and i check the spark plugs color, brown is the good one right? baka kasi pag tinanggal ko hindi ko na maibalik... and should i remove all spark plugs or only one can tell me what i want to know?[/quote]


Yep. Brown is good. That should also tell you if you have good air/fuel mix. If the air filter is an issue, your spark plugs should be blackish.

Its best to check all spark plugs to be sure. May nabibiling tool naman for spark plug removal.

[Mravhet]

Ganyan din yung sasakyan ko pre 7 to 8 km/liter, gamit ko ung toyota corolla 2door liftback, pero nung naayos nanamin 14 to 16 km/liter na siya.. pakiramdaman mo muna ung hatak ng sasakyan mo pag parang bitin ka ngh konti sa hatak o arangkada, siguradong wala sa timing ung makina mo... believe me pre. ganyan na ganyan din kasi nangyari sa akin...

[1D4LV]

hmmmm. i still have my corolla XE na carb... yung nga lang lovelife ang body.
it consumes around 9-10 kpl lang. masyado atang mataas yung hinahanap mong average sa FC dude.

[neyzon]

Hi I'm new on cars just got ny 1st car few months ago it's a Mitsubishi Lancer 1997 1.3 Carb type. I have similar problem fc is avering only to 7.2km/l. Light footed naman ako and have followed fuel economy tips. I had my engine tuned up for fuel economy few months ago it seemed to improve but recently it seemed went back to 7km/l. I'm not sure if "pizza pies" have bad fc or if it's just mine.

[kidsharingan]

good day,

mga sirs/experts here.. I need your advise, I have a ae92 corolla with a 4af carburetor engine... gusto ko lang sana malaman kung anong mga mods ang pwede gawin para mas lumakas ang makina ko,, for info meron na itong bagong simota cone filter with adoptor sa carb, at pinapalitan ko na ng custom made 4 into 1 shorty header .... itatanong ko nlang kung ano pa pwede gawin sa mismong engine, may nabibili ba na performance camshaft para sa 4af? parang may nabasa kasi ako dati na pwede daw ikabit yung cam shaft ng 5afe dahil mas high daw ang duration nito.. pwede po ba yun? ayaw ko kasi magpalit ng makina, kasi maganda pa naman ang performance ng 4af ko, malakas pa sya humatak ang gusto ko lang ay mas lumakas pa ito, at isa pa mas gusto ko ang mga carbureted na engine dahil sa simple design ng mga ito ...at ayaw ko na din magka hassle pa sa LTO sa pag change ng engine.... any input po mga sir will be appreciated ... TIA

[Mravhet]

My car is a Toyota Corolla XE 95. I had it overhauled, tuned up, replaced timing belt, replaced the motor in the radiator, modified the carb with a brand new 4k carb, replaced all stuffs with regards to "kalampag", had done everything i know with regards to fuel consumption to save gas, yet it still consumes alot... city driving is 6.5-8km per liter, long drives 7.5-8.5km at the most...

i really am having problems with it... most cars of the same model consumes atleast 10-14km per liter after having read most forums here and other sites... what could be the problem?

Most friends and mechanics i ask suggested to have the carb's jet adjusted to smaller one... but it will sacrifice something, that is, yung hatak daw... but what i am trying to understand is that, why other cars of the same model, even the taxi is fuel efficient than mine? they haven't adjusted their jets yet.. thats what my friends say, some with 2e carb and others with 4k carb... help!!!

Ganyan din yung sasakyan ko pre 7 to 8 km/liter, gamit ko ung toyota corolla 2door liftback, pero nung naayos nanamin 14 to 16 km/liter na siya.. pakiramdaman mo muna ung hatak ng sasakyan mo pag parang bitin ka ngh konti sa hatak o arangkada, siguradong wala sa timing ung makina mo... believe me pre. ganyan na ganyan din kasi nangyari sa akin...

[nptolentino]

Ganyan din yung sasakyan ko pre 7 to 8 km/liter, gamit ko ung toyota corolla 2door liftback, pero nung naayos nanamin 14 to 16 km/liter na siya.. pakiramdaman mo muna ung hatak ng sasakyan mo pag parang bitin ka ngh konti sa hatak o arangkada, siguradong wala sa timing ung makina mo... believe me pre. ganyan na ganyan din kasi nangyari sa akin...

Tama, kung yung RPM mo naman ay stable sa 800-900 at hindi erratic ang idling mo, it means stable ang bigay ng carburetor mo kasi kung malakas ang sirit ng gas dapat maitim at puro carbon ang spark plugs mo (rich mixture), at nagtatapon ka lang ng gas. Ipa check mo maige yung makina mo sa ignition timing at cylinder compression. Para mahabol mo kasi ang pinakamalapit sa ideal gas consumption para sa engine displacement ng makina mo, dapat nasa tama yung timing at di ka loose compression at tsaka hindi ka sliding clutch. pwede rin ignition system mula coil papunta sa high-tension wires hangang spark plugs pero alanganin kasi dapat erratic ang idling mo kung yun ang may problema. Ako naka toyota corona, 2.0 ang makina ko pero 12-13km per liter, long drive at 10-11 km city drive at hindi ko pa masyado na maintain, samantalang sa iyo if I'm not mistaken eh 1.3 liters. Tignan mo rin baka may naiwang kalabaw sa compartment mo peace!!!!