No Idle problem when full stop, car runs fine when foot is on gas

[Mile2]

originally, idling ko was set to 700-800. Wala naman nagalaw sa makina, except for the sparkplug replacement last september

NGK ba ang brand na nabili mo na spark plug? pag NGK merong mga fake nito. Erratic idling ang symptom ng fake NGK.

[reym]

Well as per your description of the problem, you might have a clogged idle circuit in your carb. You need to disassemble the carb and clean it.

No amount of carb cleaner spray can clean a clogged idle orifice unless you disassemble the carb and spray the carb cleaner directly into the idle orifice.

[weisshorn]

Well as per your description of the problem, you might have a clogged idle circuit in your carb. You need to disassemble the carb and clean it.

No amount of carb cleaner spray can clean a clogged idle orifice unless you disassemble the carb and spray the carb cleaner directly into the idle orifice.

Sang-ayon ako dito.

Barado siguro ang fuel holes sa idle screw. subukan mo alisin ang screw then bugahan ng compressed air. Nangyari dati sa old toyota corona ko, nabutas ang fuel strainer dyan sa puno ng fuel connector mismo sa carburador, ang maliit ng wire mula sa strainer ay bumara dyan sa drilled hole just below the flap. ayon walang gas na pumapasok kapag naka idle/sarado ang flap ng carb. other source of problem might be open or block vacuum hose connection dyan sa carburador kaya mali ang air-fuel ratio, ito exactly ang nangyari naman sa 89 lancer ko dati. lumambot at nagsara ang hose after engine washing.

[CoolSwitch]

I was advised by a local mechanic to remove the carb and ibabad sa lacquer thinner, barado nga daw yung sa may idle.....tama ba ito? wala ba pedeng madamage yung lacquer thinner? Wala bang rubber o-rings na pwedeng lumutong/matunaw?

TIA

[CoolSwitch]

Ok na po ulit (it seems to be)

Nag swap na lang ako ng carb, may extra kasi ako galing sa dating engine ko.

And before ko swap, binabad ko muna sa lacquer thinner, blew some compressed air on nooks and crannies.

So linisin ko na lang yung may problema, at least verified that problem is with the carb nga, malamang madumi nga yung idle orifice, babad ko tomorrow sa lacquer thinner

Maraming salamat sa lahat ng opinion and ideas... kung wala yun, malamang nangamote ako at nagbayad na lang :D

Now I learned new things about car maintenance

[reym]

Congratulations to you. You have learned fuel system 101.

If you still want to learn, you could clean the offending carb and re-install it, this way you could pinpoint the problem within the carb itself and will save you a lot of money. Carb swap is only done as a last resort because carb is expensive.

[CoolSwitch]

*Reym

How much does a surplus carb usually cost?

at least now I have a few idea on how the carb works, medyo mahirap lang magbaklas, nanakit ang likod ko :D

[reym]

a second hand carb for toyota 4k will cost you 1,500 + labor :because you should open, clean the inside and look for missing parts. A brand new china made carb is worth 3,500 pesos but it is not free from head ache. A brand new original carb is worth 10,000. For 2E models it is much expensive.

Since toyota parts are cheaper than nissan, expect 20 to 40% increase in price.

[CoolSwitch]

Thanks for the heads up/...

I'll keep the extra carb I have in good condition... buti na lang pala di ko na-dispose after mapalitan makina ko

btw... the previous carb (extra) that we removed is currently being cleaned. Dami na nga dumi, may part na parang putik na nag accumulate

[reym]

kindly post results when you have cleaned and tested the carburetor from the original engine.