Carburetor Section

Darth

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May 10, 2005
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dis thread still alive..............fuyoooo...........:adore:
 

SkYwAlKeR

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Mar 12, 2005
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4g91 carb not many tuners around... coz japan mali carb and it is not popular...

why ur proton using 4g91 carb at the first place??... where ur oem carb??..
 

yewjunyan

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Jun 19, 2006
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for the Saga, my original carburator is still under my bed...i m thinking of changing back to it if there is no solution for the abovementioned problem...
 

proPIPING

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Mar 23, 2006
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one more systoms i notice on this carb is that when i deccelerating, off throttle, i can hear the 'poping' sound from the ekzos paip...sounds like a lean poping to me...but i still not clear how to solve the hessitation....jerk everytime i press the gas padle really makes me to loss confident of driving this car...sifu pls help me to teach this naughty 4g91 carb...thanks...:itsme:
poping may cause from the timing that too advance...check your timing at the workshop using timing light...normally it will be 10 degree at 850-1000rpm....
 

angelic_ryder

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Jan 21, 2006
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hi, i'm having some prob wif toyota se 4af carb. (standard carb)

1. the car doesnt feel rite (b4 this felt really torquey n surprised wif d pwr even 4 stock engine )
2. got strong fuel smell from the muffler
3. Carb leaking
4. spark plug black color (i think 2 rich gua)

Things that ad done
1. carb cleaned using wd40
2. new air filter
3. new spark plug
4. new petrol filter
5. noting wrong wif spark plug cable
6. did tuning ad (many times actually)

Went to a few diff mec (min 4 -5), all saying diff things. These are the probs listed by the mecs
1. Carb kong ad (hav 2 chnge cuz smthing to do wif butterfly not opening)
2. engine compression out (need over haul)
3. change 2 4age
4. old car ad ma, so normal laaa....

im seriously tired wif all this.. can anyone suggest or enlighten me on wats d real prob.. is it the carb or the engine?

any replies will truly b appreciated...
 

fstr

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Apr 19, 2004
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hi, i'm having some prob wif toyota se 4af carb. (standard carb)

1. the car doesnt feel rite (b4 this felt really torquey n surprised wif d pwr even 4 stock engine )
2. got strong fuel smell from the muffler (change your fuel line rubber, change your fuel pump, change your petrol filter)
3. Carb leaking (check all the hose to your carb, from petrol to air)
4. spark plug black color (i think 2 rich gua) (yeah, very rich and advance timing)

Things that ad done
1. carb cleaned using wd40 (waste money and time, use ur hand to pump & tarik d throttle 9 9)
2. new air filter (no difference)
3. new spark plug (use back normal plugs, no.5 or no.6. dont go use high end 100 buck per stick kinda plugs)
4. new petrol filter (then it must be your fuel hose rubber located under/behind your trunk which is the fuel tank)
5. noting wrong wif spark plug cable (check your distributor and ignition coil)
6. did tuning ad (many times actually)

Went to a few diff mec (min 4 -5), all saying diff things. These are the probs listed by the mecs
1. Carb kong ad (hav 2 chnge cuz smthing to do wif butterfly not opening)
(this one big possibility)
2. engine compression out (need over haul)
(no such thing)
3. change 2 4age
(i also can say that, in fact say it to many ppl, many times):biggrin:
4. old car ad ma, so normal laaa....
(mine older then yours, so how??)

im seriously tired wif all this.. can anyone suggest or enlighten me on wats d real prob.. is it the carb or the engine?

any replies will truly b appreciated...
replied in bold :hmmmm:
 

SkYwAlKeR

Over 10,000 RPM!
Senior Member
Mar 12, 2005
10,139
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5,183
ePoh ~ malacca
Visit site
hi, i'm having some prob wif toyota se 4af carb. (standard carb)

1. the car doesnt feel rite (b4 this felt really torquey n surprised wif d pwr even 4 stock engine )
2. got strong fuel smell from the muffler
3. Carb leaking
4. spark plug black color (i think 2 rich gua)

Things that ad done
1. carb cleaned using wd40
2. new air filter
3. new spark plug
4. new petrol filter
5. noting wrong wif spark plug cable
6. did tuning ad (many times actually)

Went to a few diff mec (min 4 -5), all saying diff things. These are the probs listed by the mecs
1. Carb kong ad (hav 2 chnge cuz smthing to do wif butterfly not opening)
2. engine compression out (need over haul)
3. change 2 4age
4. old car ad ma, so normal laaa....

im seriously tired wif all this.. can anyone suggest or enlighten me on wats d real prob.. is it the carb or the engine?

any replies will truly b appreciated...
which part of ur carburetor is leaking??... i suspect bottom of ur carburetor... if so, air will leaks out... less fuel, more air, rich air fuel ratio....

u clean ur carburetor with wd40 regularly??... wd40 could be the cause wearing out ur carburetor gasket...
 

proPIPING

1,000 RPM
Senior Member
Mar 23, 2006
1,077
5
1,638
hi, i'm having some prob wif toyota se 4af carb. (standard carb)

1. the car doesnt feel rite (b4 this felt really torquey n surprised wif d pwr even 4 stock engine )
2. got strong fuel smell from the muffler
3. Carb leaking
4. spark plug black color (i think 2 rich gua)

Things that ad done
1. carb cleaned using wd40
2. new air filter
3. new spark plug
4. new petrol filter
5. noting wrong wif spark plug cable
6. did tuning ad (many times actually)

Went to a few diff mec (min 4 -5), all saying diff things. These are the probs listed by the mecs
1. Carb kong ad (hav 2 chnge cuz smthing to do wif butterfly not opening)
2. engine compression out (need over haul)
3. change 2 4age
4. old car ad ma, so normal laaa....

im seriously tired wif all this.. can anyone suggest or enlighten me on wats d real prob.. is it the carb or the engine?

any replies will truly b appreciated...
is't the car difficult to start in the morning?
 

angelic_ryder

Known Member
Senior Member
Jan 21, 2006
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bro fstrader,
thanks 4 d lengthy advice... first time using carb engine, so really2 noob... bro, bout the compression thingy, this is wat the mec told:

"Since compression out, spark plug cant burnt fuel effectively, hence the petrol smell.. he also say no prob wif carb, spark plug and cables.. so, confirm compression prob "

will check and try each of ur advice to solve the problem.. if cannot, i think hav 2 come to ur place la... which part in kepong? near mitch's place ar??

bro skywalker,
yes, u r rite.. leaking at the bottom... but the mec i go to says its not the gasket.. at first i tot gasket bocor, but he say carb hav 2change.. actually d mec use wd40 to clean d carb..

bro propiping,
nope... touch wood.. until nw, no problem wif morning starts..


ps: thanks for all d advice... hopefully my issues can b solved asap.. Really loving CARBS.. Tats weird especially in this era... HAHAHAHA
 

proPIPING

1,000 RPM
Senior Member
Mar 23, 2006
1,077
5
1,638
carb era will be here always, we never forget our roots :biggrin:
wanna cry ar remembering that time...still study,saving half of the money given by my parent to mods my proton knight...buy webber dcnf40,pnp,bigger clutch and etc...always not enough money that time but the spirit to mods the car finally make me archive what i want...:bawling:
 

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